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class="sidebar-actions"><section class="sidebar-filter-container"><div class="sidebar-filter "><label id="sidebar-filter-label" class="sidebar-filter-label" for="sidebar-filter-input"><span class="icon icon-filter"></span><span class="visually-hidden">Filter sidebar</span></label><input id="sidebar-filter-input" autoComplete="off" class="sidebar-filter-input-field false" type="text" placeholder="Filter" value=""/><button type="button" class="button action has-icon clear-sidebar-filter-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear filter input</span></span></button></div></section></header><div class="sidebar-inner-nav"><div class="in-nav-toc"><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In diesem Artikel</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#probieren_sie_es_aus">Probieren Sie es aus</a></li><li class="document-toc-item "><a class="document-toc-link" href="#syntax">Syntax</a></li><li class="document-toc-item "><a class="document-toc-link" href="#beschreibung">Beschreibung</a></li><li class="document-toc-item "><a class="document-toc-link" href="#beispiele">Beispiele</a></li><li class="document-toc-item "><a class="document-toc-link" href="#spezifikationen">Spezifikationen</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser-kompatibilität">Browser-Kompatibilität</a></li><li class="document-toc-item "><a class="document-toc-link" href="#siehe_auch">Siehe auch</a></li></ul></section></div></div><div class="sidebar-body"> <ol> <li class="section"><a href="/de/docs/Web/JavaScript">JavaScript</a></li> <li class="section">Tutorials</li> <li class="toggle"> <details> <summary>Komplette Anfänger</summary> <ol> <li><a href="/de/docs/Learn/Getting_started_with_the_web/JavaScript_basics">JavaScript-Grundlagen</a></li> <li><a href="/de/docs/Learn/JavaScript/First_steps">Erste Schritte in JavaScript</a></li> <li><a href="/de/docs/Learn/JavaScript/Building_blocks">JavaScript-Bausteine</a></li> <li><a href="/de/docs/Learn/JavaScript/Objects">Einführung in JavaScript-Objekte</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary>JavaScript-Handbuch</summary> <ol> <li><a href="/de/docs/Web/JavaScript/Guide/Introduction">Einführung</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Grammar_and_types">Grammatik und Typen</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Control_flow_and_error_handling">Steuerfluss und Fehlerbehandlung</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Loops_and_iteration">Schleifen und Iteration</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Functions">Funktionen</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Expressions_and_operators">Ausdrücke und Operatoren</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Numbers_and_dates">Zahlen und Daten</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Text_formatting">Textformatierung</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Regular_expressions">Reguläre Ausdrücke</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Indexed_collections">Indexierte Sammlungen</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Keyed_collections">Gekennzeichnete Sammlungen</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Working_with_objects">Arbeiten mit Objekten</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Using_classes">Verwendung von Klassen</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Using_promises">Verwendung von Promises</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Typed_arrays">Typisierte Arrays in JavaScript</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Iterators_and_generators">Iteratoren und Generatoren</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Meta_programming">Metaprogrammierung</a></li> <li><a href="/de/docs/Web/JavaScript/Guide/Modules">JavaScript-Module</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary>Mittelstufe</summary> <ol> <li><a href="/de/docs/Learn/Tools_and_testing/Client-side_JavaScript_frameworks">Client-seitige JavaScript-Frameworks</a></li> <li><a href="/de/docs/Learn/JavaScript/Client-side_web_APIs">Client-seitige Web-APIs</a></li> <li><a href="/de/docs/Web/JavaScript/Language_overview">Sprachübersicht</a></li> <li><a href="/de/docs/Web/JavaScript/Data_structures">JavaScript-Datenstrukturen</a></li> <li><a href="/de/docs/Web/JavaScript/Equality_comparisons_and_sameness">Gleichheitsvergleiche und Gleichheit</a></li> <li><a href="/de/docs/Web/JavaScript/Enumerability_and_ownership_of_properties">Aufzählbarkeit und Eigentum von Eigenschaften</a></li> <li><a href="/de/docs/Web/JavaScript/Closures">Closures</a></li> </ol> </details> </li> <li class="toggle"> <details> <summary>Fortgeschritten</summary> <ol> <li><a href="/de/docs/Web/JavaScript/Inheritance_and_the_prototype_chain">Vererbung und die Prototypenkette</a></li> <li><a href="/de/docs/Web/JavaScript/Memory_management">Speicherverwaltung</a></li> <li><a href="/de/docs/Web/JavaScript/Event_loop">Konkurrenzmodell und Ereignisschleife</a></li> </ol> </details> </li> <li class="section"><a href="/de/docs/Web/JavaScript/Reference">Referenzen</a></li> <li class="toggle"> <details> <summary>Eingebaute Objekte</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects">Standard eingebaute Objekte</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/AggregateError">AggregateError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Array">Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer">ArrayBuffer</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncFunction">AsyncFunction</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncGenerator">AsyncGenerator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncGeneratorFunction">AsyncGeneratorFunction</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncIterator">AsyncIterator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Atomics">Atomics</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt">BigInt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array">BigInt64Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigUint64Array">BigUint64Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean">Boolean</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/DataView">DataView</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Date">Date</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/decodeURI">decodeURI()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent">decodeURIComponent()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/encodeURI">encodeURI()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent">encodeURIComponent()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Error">Error</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/escape">escape()</a><abbr class="icon icon-deprecated" title="Veraltet. Nicht für neue Websites verwenden."> <span class="visually-hidden">Veraltet</span> </abbr></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/eval">eval()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/EvalError">EvalError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/FinalizationRegistry">FinalizationRegistry</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Float16Array">Float16Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Float32Array">Float32Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Float64Array">Float64Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function">Function</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Generator">Generator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/GeneratorFunction">GeneratorFunction</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/globalThis">globalThis</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Infinity">Infinity</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Int16Array">Int16Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Int32Array">Int32Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Int8Array">Int8Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/InternalError">InternalError</a><abbr class="icon icon-nonstandard" title="Nicht standardisiert. Überprüfen Sie die Unterstützung in verschiedenen Browsern, bevor Sie es verwenden."> <span class="visually-hidden">Nicht standardisiert</span> </abbr></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Intl">Intl</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/isFinite">isFinite()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/isNaN">isNaN()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Iterator">Iterator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/JSON">JSON</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Map">Map</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Math">Math</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/NaN">NaN</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number">Number</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object">Object</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/parseFloat">parseFloat()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/parseInt">parseInt()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Promise">Promise</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Proxy">Proxy</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/RangeError">RangeError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError">ReferenceError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Reflect">Reflect</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/RegExp">RegExp</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Set">Set</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer">SharedArrayBuffer</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/String">String</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol">Symbol</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError">SyntaxError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypedArray">TypedArray</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError">TypeError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array">Uint16Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array">Uint32Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array">Uint8Array</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray">Uint8ClampedArray</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/undefined">undefined</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/unescape">unescape()</a><abbr class="icon icon-deprecated" title="Veraltet. Nicht für neue Websites verwenden."> <span class="visually-hidden">Veraltet</span> </abbr></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/URIError">URIError</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/WeakMap">WeakMap</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/WeakRef">WeakRef</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/WeakSet">WeakSet</a></li></ol> </details> </li> <li class="toggle"> <details open=""> <summary>Ausdrücke und Operatoren</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Operators">Ausdrücke und Operatoren</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Addition">Addition (+)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Addition_assignment">Addition Assignment (+=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Assignment">Zuweisung (=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/async_function">async function expression</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/async_function*">async function* Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/await">await</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_AND">Bitweises UND (&)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_AND_assignment">Bitweise UND-Zuweisung (&=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_NOT">Bitweise NOT (~)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_OR">Bitweises Oder (|)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_OR_assignment">Bitweises OR-Zuweisung (|=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR">Bitweises XOR (^)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR_assignment">Bitweises XOR-Zuweisung (^=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/class">Klassenausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Comma_operator">Komma-Operator (,)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Conditional_operator">Bedingungsoperator (ternärer Operator)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Decrement">Decrement (--)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/delete">delete</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment">Destructuring-Zuweisung</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Division">Division (/)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Division_assignment">Division assignment (/=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Equality">Gleichheit (==)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Exponentiation">Potenzierung (**)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Exponentiation_assignment">Exponentiation-Zuweisung (**=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/function">function expression</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/function*">function* Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Greater_than">Greater than (>)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Greater_than_or_equal">Greater than or equal (>=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Grouping">Gruppierungsoperator ( )</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/import.meta">import.meta</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/import">import()</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/in">in</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Increment">Increment (++)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Inequality">Inequality (!=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/instanceof">instanceof</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Left_shift">Left shift (<<)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Left_shift_assignment">Left shift assignment (<<=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Less_than">Less than (<)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Less_than_or_equal">Less than or equal (<=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Logical_AND">Logisches UND (&&)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Logical_AND_assignment">Logical AND assignment (&&=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Logical_NOT">Logisches NICHT (!)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Logical_OR">Logical OR (||)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Logical_OR_assignment">Logische ODER-Zuweisung (||=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Multiplication">Multiplication (*)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Multiplication_assignment">Multiplikationszuweisung (*=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/new">new</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/new.target">new.target</a></li><li><em><a href="/de/docs/Web/JavaScript/Reference/Operators/null" aria-current="page">null</a></em></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_assignment">Nullish coalescing assignment (??=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing">Nullish coalescing-Operator (??)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Object_initializer">Object initializer</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Operator_precedence">Operatorpriorität</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Optional_chaining">Optional Chaining (?.)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Property_accessors">Property accessors</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Remainder">Remainder (%)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Remainder_assignment">Remainder-Zuweisung (%=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Right_shift">Rechtsschiebung (>>)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Right_shift_assignment">Right shift assignment (>>=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Spread_syntax">Spread-Syntax (...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Strict_equality">Strikte Gleichheit (===)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Strict_inequality">Strikte Ungleichheit (!==)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Subtraction">Subtraction (-)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Subtraction_assignment">Subtraction assignment (-=)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/super">super</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/this">this</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/typeof">typeof</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unary_negation">Unäre Negation (-)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unary_plus">Unary plus (+)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift">Unsigned right shift (>>>)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift_assignment">Unsigned right shift assignment (`>>>=`)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/void">void operator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/yield">yield</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Operators/yield*">yield*</a></li></ol> </details> </li> <li class="toggle"> <details> <summary>Anweisungen und Deklarationen</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Statements">Statements und Deklarationen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/async_function">async function</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/async_function*">async function*</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/block">Block Statement</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/break">break</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/class">class</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/const">const</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/continue">continue</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/debugger">debugger</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/do...while">do...while</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/Empty">Empty Statement</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/export">export</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/Expression_statement">Expression statement</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/for">for</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/for-await...of">for await...of</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/for...in">for...in</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/for...of">for...of</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/function">function</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/function*">function*</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/if...else">if...else</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/import">import</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/label">Labelierte Anweisung</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/let">let</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/return">return</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/switch">switch</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/throw">throw</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/try...catch">try...catch</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/var">var</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/while">while</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Statements/with">with</a><abbr class="icon icon-deprecated" title="Veraltet. Nicht für neue Websites verwenden."> <span class="visually-hidden">Veraltet</span> </abbr></li></ol> </details> </li> <li class="toggle"> <details> <summary>Funktionen</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Functions">Functions</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/Arrow_functions">Pfeilfunktionen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/Default_parameters">Default parameters</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/get">get</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/Method_definitions">Methodendefinitionen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/rest_parameters">Rest-Parameter</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/set">set</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Functions/arguments">Das arguments Objekt</a></li></ol> </details> </li> <li class="toggle"> <details> <summary>Klassen</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Classes">Klassen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/constructor">constructor</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/extends">extends</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/Private_properties">Private properties</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/Public_class_fields">Public class fields</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/static">static</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks">Statische Initialisierungsblöcke</a></li></ol> </details> </li> <li class="toggle"> <details> <summary>Reguläre Ausdrücke</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions">Regular expressions</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Backreference">Backreference: \1, \2</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Capturing_group">Capturing group: (...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape">Zeichenklassen-Escape: \d, \D, \w, \W, \s, \S</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_class">Zeichenklasse: [...], [^...]</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape">Zeichen-Escape: \n, \u{...}</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Disjunction">Disjunktion: |</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion">Input-Bereichs-Assertion: ^, $</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character">Literalzeichen: a, b</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Lookahead_assertion">Lookahead-Assertion: (?=...), (?!...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Lookbehind_assertion">Lookbehind Assertion: (?<=...), (?<!...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Modifier">Modifikator: (?ims-ims:...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Named_backreference">Benannte Rückreferenz: \k<name></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Named_capturing_group">Named capturing group: (?<name>...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Non-capturing_group">Nicht erfassende Gruppe: (?:...)</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Quantifier">Quantifier: *, +, ?, {n}, {n,}, {n,m}</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Unicode_character_class_escape">Unicode-Zeichenklassenescapes: \p{...}, \P{...}</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Wildcard">Wildcard: .</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Regular_expressions/Word_boundary_assertion">Wortgrenzen-Assertion: \b, \B</a></li></ol> </details> </li> <li class="toggle"> <details> <summary>Fehler</summary> <ol><li><a href="/de/docs/Web/JavaScript/Reference/Errors">JavaScript-Fehlerreferenz</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Promise_any_all_rejected">AggregateError: Kein Promise in Promise.any wurde aufgelöst</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Property_access_denied">Fehler: Zugriff verweigert auf Eigenschaft "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Too_much_recursion">InternalError: zu viel Rekursion</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Not_a_valid_code_point">RangeError: argument ist kein gültiger Codepunkt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/BigInt_division_by_zero">RangeError: BigInt-Division durch Null</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/BigInt_negative_exponent">RangeError: BigInt negative exponent</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Form_must_be_one_of">RangeError: form muss einer von 'NFC', 'NFD', 'NFKC' oder 'NFKD' sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_array_length">RangeError: invalid array length</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_date">RangeError: invalid date</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Precision_range">RangeError: precision liegt außerhalb des zulässigen Bereichs</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_radix">RangeError: radix muss eine ganze Zahl sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Resulting_string_too_large">RangeError: repeat count muss kleiner als unendlich sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Negative_repetition_count">RangeError: repeat count must be non-negative</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_be_converted_to_BigInt_because_it_isnt_an_integer">RangeError: x kann nicht in BigInt konvertiert werden, da es keine ganze Zahl ist</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Not_defined">ReferenceError: "x" ist nicht definiert</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Undeclared_var">ReferenceError: Zuordnung zu einer nicht deklarierten Variable "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_access_lexical_declaration_before_init">ReferenceError: kann auf lexikalische Deklaration 'X' vor der Initialisierung nicht zugreifen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Deprecated_caller_or_arguments_usage">ReferenceError: veraltete Verwendung von caller oder arguments</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Super_not_called">ReferenceError: 'super' Konstruktor muss vor der Verwendung von 'this' im Konstruktor der abgeleiteten Klasse aufgerufen werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Super_called_twice">ReferenceError: super() zweimal im abgeleiteten Klassenkonstruktor aufgerufen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_strict_arguments_eval">SyntaxError: 'arguments'/'eval' können im Strict-Mode-Code nicht definiert oder zugewiesen werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_literal">SyntaxError: "0"-präfixierte Oktalliterale sind veraltet</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Strict_non_simple_params">SyntaxError: "use strict" nicht erlaubt in Funktion mit nicht einfachen Parametern</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Reserved_identifier">SyntaxError: "x" ist ein reservierter Bezeichner</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_backslash_at_end_of_pattern">SyntaxError: \ am Ende des Musters</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_for-of_initializer">SyntaxError: Eine Deklaration im Kopf einer for-of-Schleife darf keinen Initialisierer haben</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Delete_in_strict_mode">SyntaxError: Die Anwendung des 'delete'-Operators auf einen unqualifizierten Namen ist veraltet</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Arguments_not_allowed">SyntaxError: arguments ist in Feldern nicht gültig</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_await">SyntaxError: await ist nur in async Funktionen, async Generatoren und Modulen gültig</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/await_yield_in_parameter">SyntaxError: await/yield expression kann nicht im Parameter verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_use_nullish_coalescing_unparenthesized">SyntaxError: `??` kann nicht ohne Klammern innerhalb von `||` und `&&`-Ausdrücken verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_character_class_escape_in_class_range">SyntaxError: Zeichenklassen-Escape kann nicht im Klassenbereich im regulären Ausdruck verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_continue">SyntaxError: continue muss innerhalb einer Schleife sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_duplicate_capture_group_name">SyntaxError: doppelter Name der Erfassungsgruppe im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Duplicate_parameter">SyntaxError: doppeltes formales Argument x</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_for-in_initializer">SyntaxError: Deklarationen im Kopf einer for-in-Schleife dürfen keine Initialisierer enthalten</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Unnamed_function_statement">SyntaxError: Funktionsanweisung erfordert einen Namen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Function_label">SyntaxError: Funktionen können nicht beschriftet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Either_be_both_static_or_non-static">SyntaxError: Getter und Setter für privaten Namen #x sollten entweder beide statisch oder nicht statisch sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Getter_no_arguments">SyntaxError: Getter-Funktionen dürfen keine Argumente haben</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Identifier_after_number">SyntaxError: identifier startet direkt nach einer numerischen Literal</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Illegal_character">SyntaxError: illegales Zeichen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/import_decl_module_top_level">SyntaxError: import-Deklarationen dürfen nur auf der obersten Ebene eines Moduls erscheinen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_incomplete_quantifier">SyntaxError: unvollständiger Quantifizierer im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_assignment_left-hand_side">SyntaxError: invalid assignment left-hand side</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_BigInt_syntax">SyntaxError: Ungültige BigInt-Syntax</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_capture_group_name">SyntaxError: ungültiger Name der Erfassungsgruppe im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_char_in_class">SyntaxError: ungültiges Zeichen in Klasse in regulärem Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_class_set_operation">SyntaxError: Ungültige Klassenmengenoperation im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_decimal_escape">SyntaxError: ungültiger Dezimal-Escape in regulärem Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_identity_escape">SyntaxError: ungültige Identitätsflucht in regulärem Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_named_capture_reference">SyntaxError: ungültige benannte Referenz in regulärem Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_property_name">SyntaxError: ungültiger Eigenschaftsname im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_range_in_character_class">SyntaxError: invalid range in character class</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_group">SyntaxError: invalid regexp group</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_regexp_flag">SyntaxError: invalid regular expression flag "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_unicode_escape">SyntaxError: ungültiger Unicode-Escape in regulärem Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse">SyntaxError: JSON.parse: Fehlerhaftes Parsing</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Label_not_found">SyntaxError: label not found</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_colon_after_property_id">SyntaxError: missing : after property id</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_argument_list">SyntaxError: missing ) after argument list</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_condition">SyntaxError: missing ) after condition</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_bracket_after_list">SyntaxError: missing ] after element list</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_function_body">SyntaxError: fehlende } nach Funktionskörper</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_property_list">SyntaxError: missing } after property list</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_initializer_in_const">SyntaxError: missing = in const declaration</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_formal_parameter">SyntaxError: missing formal parameter</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Missing_name_after_dot_operator">SyntaxError: missing name after . operator</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/No_variable_name">SyntaxError: missing variable name</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_negated_char_class_with_strings">SyntaxError: Negierte Zeichenklasse mit Strings im regulären Ausdruck</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_new_optional">SyntaxError: new-Schlüsselwort kann nicht mit einer Optionalen Kette verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_nothing_to_repeat">SyntaxError: nothing to repeat</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_numbers_out_of_order_in_quantifier">SyntaxError: numbers out of order in {} quantifier.</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_escape_sequence">SyntaxError: Oktale Escape-Sequenzen können nicht in nicht-getaggten Vorlagenliteralen oder im Strict Mode-Code verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Parameter_after_rest_parameter">SyntaxError: parameter nach Rest-Parameter</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_delete_private_fields">SyntaxError: private fields können nicht gelöscht werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Duplicate_proto">SyntaxError: Eigenschaftenname __proto__ erscheint mehr als einmal im Objektliteral</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Regex_raw_bracket">SyntaxError: Raw-Klammern sind im regulären Ausdruck mit Unicode-Flag nicht erlaubt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Redeclared_parameter">SyntaxError: redeclaration of formal parameter "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Undeclared_private_field_or_method">SyntaxError: Verweis auf nicht deklariertes privates Feld oder Methode #x</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Rest_with_default">SyntaxError: Restparameter darf keinen Standardwert haben</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_return">SyntaxError: return not in function</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Setter_one_argument">SyntaxError: Setter-Funktionen müssen ein Argument haben</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/String_literal_EOL">SyntaxError: string literal enthält einen nicht-escaped Zeilenumbruch</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_super_call">SyntaxError: super() ist nur in Konstruktoren abgeleiteter Klassen gültig</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_optional_template">SyntaxError: getaggtes Template kann nicht mit optionaler Verkettung verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Hash_outside_class">SyntaxError: Unerwartetes '#' außerhalb des Klassenkörpers verwendet</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Unexpected_token">SyntaxError: Unerwartetes Token</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_break">SyntaxError: unlabeled break muss innerhalb einer Schleife oder eines Switch sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Unparenthesized_unary_expr_lhs_exponentiation">SyntaxError: unverklammerter unärer Ausdruck kann nicht auf der linken Seite von '**' erscheinen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Bad_super_prop">SyntaxError: Verwendung von Super-Eigenschaften/-mitgliedern ist nur innerhalb von Methoden oder eval-Code innerhalb von Methoden gültig</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Deprecated_source_map_pragma">SyntaxError: Die Verwendung von //@ zur Angabe von sourceURL-Pragmas ist veraltet. Verwenden Sie stattdessen //#</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/is_not_iterable">TypeError: 'x' ist nicht iterierbar</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Unexpected_type">TypeError: "x" ist (nicht) "y"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Not_a_constructor">TypeError: "x" ist kein Konstruktor</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Not_a_function">TypeError: "x" ist keine Funktion</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/No_non-null_object">TypeError: "x" ist kein nicht-null-Objekt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Read-only">TypeError: "x" ist schreibgeschützt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/BigInt_not_serializable">TypeError: BigInt-Wert kann nicht in JSON serialisiert werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Builtin_ctor_no_new">TypeError: Der Aufruf eines eingebauten X-Konstruktors ohne new ist verboten</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Get_set_missing_private">TypeError: kann nicht auf privates Feld oder Methode zugreifen/setzen: Objekt ist nicht die richtige Klasse</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_assign_to_property">TypeError: kann Eigenschaft „x“ auf „y“ nicht zuweisen: kein Objekt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_convert_BigInt_to_number">TypeError: can't convert BigInt to number</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_convert_x_to_BigInt">TypeError: kann x nicht in BigInt konvertieren</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_define_property_object_not_extensible">TypeError: kann Eigenschaft "x" nicht definieren: "obj" ist nicht erweiterbar</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Non_configurable_array_element">TypeError: can't delete non-configurable array element</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_redefine_property">TypeError: kann nicht konfigurierbare Eigenschaft "x" neu definieren</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_set_prototype">TypeError: kann das Prototyp dieses Objekts nicht festlegen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cyclic_prototype">TypeError: can't set prototype: it would cause a prototype chain cycle</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/in_operator_no_object">TypeError: kann den 'in'-Operator nicht verwenden, um nach 'x' in 'y' zu suchen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Class_ctor_no_new">TypeError: Klassenkonstruktoren müssen mit 'new' aufgerufen werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value">TypeError: cyclic object value</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_derived_return">TypeError: abgeleiteter Klassenkonstruktor hat einen ungültigen Wert x zurückgegeben</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Private_setter_only">TypeError: getting private setter-only property</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Private_double_initialization">TypeError: Initialisierung eines Objekts zweimal ist ein Fehler bei privaten Feldern/Methoden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/invalid_right_hand_side_instanceof_operand">TypeError: ungültiger 'instanceof'-Operand 'x'</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Array_sort_argument">TypeError: invalides Array.prototype.sort Argument</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Invalid_const_assignment">TypeError: ungültige Zuweisung zu const "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Constructor_cant_be_used_directly">TypeError: Iterator/AsyncIterator-Konstruktor kann nicht direkt verwendet werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Requires_global_RegExp">TypeError: matchAll/replaceAll muss mit einem globalen RegExp aufgerufen werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/More_arguments_needed">TypeError: Mehr Argumente benötigt</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/No_properties">TypeError: null/undefined hat keine Eigenschaften</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Cant_delete">TypeError: Eigenschaft "x" ist nicht konfigurierbar und kann nicht gelöscht werden</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Reduce_of_empty_array_with_no_initial_value">TypeError: Reduce eines leeren Arrays ohne initialen Wert</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Getter_only">TypeError: Einstellung der nur-Getter-Eigenschaft "x"</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Key_not_weakly_held">TypeError: WeakSet-Schlüssel/WeakMap-Wert 'x' muss ein Objekt oder ein nicht registriertes Symbol sein</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Called_on_incompatible_type">TypeError: X.prototype.y auf inkompatiblen Typ aufgerufen</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Malformed_URI">URIError: malformed URI sequence</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Already_has_pragma">Warnung: -file- wird ein //# sourceMappingURL zugewiesen, hat aber bereits eines</a></li><li><a href="/de/docs/Web/JavaScript/Reference/Errors/Stmt_after_return">Warnung: unerreichbarer Code nach return-Anweisung</a></li></ol> </details> </li> <li class="toggle"> <details> <summary>Sonstiges</summary> <ol> <li><a href="/de/docs/Web/JavaScript/JavaScript_technologies_overview">JavaScript-Technologie (Übersicht)</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Lexical_grammar">Lexikalische Grammatik</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Iteration_protocols">Iterationsprotokolle</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Strict_mode">Strenger Modus</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Template_literals">Vorlagenliterale</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Trailing_commas">Abschließende Kommas</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features">Veraltete Funktionen</a></li> </ol> </details> </li> </ol> </div></div><section class="place side"></section></nav></aside><div class="toc-container"><aside class="toc"><nav><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In diesem Artikel</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#probieren_sie_es_aus">Probieren Sie es aus</a></li><li class="document-toc-item "><a class="document-toc-link" href="#syntax">Syntax</a></li><li class="document-toc-item "><a class="document-toc-link" href="#beschreibung">Beschreibung</a></li><li class="document-toc-item "><a class="document-toc-link" href="#beispiele">Beispiele</a></li><li class="document-toc-item "><a class="document-toc-link" href="#spezifikationen">Spezifikationen</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser-kompatibilität">Browser-Kompatibilität</a></li><li class="document-toc-item "><a class="document-toc-link" href="#siehe_auch">Siehe auch</a></li></ul></section></div></nav></aside><section class="place side"></section></div></div><main id="content" class="main-content "><article class="main-page-content" lang="de"><header><h1>null</h1><details class="baseline-indicator high"><summary><span class="indicator" role="img" aria-label="Baseline Check"></span><h2>Baseline <span class="not-bold">Widely available</span></h2><div class="browsers"><span class="engine" title="Supported in Chrome and Edge"><span class="browser chrome supported" role="img" aria-label="Chrome check"></span><span class="browser edge supported" role="img" aria-label="Edge check"></span></span><span class="engine" title="Supported in Firefox"><span class="browser firefox supported" role="img" aria-label="Firefox check"></span></span><span class="engine" title="Supported in Safari"><span class="browser safari supported" role="img" aria-label="Safari check"></span></span></div><span class="icon icon-chevron "></span></summary><div class="extra"><p>This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.</p><ul><li><a href="/de/docs/Glossary/Baseline/Compatibility" data-glean="baseline_link_learn_more" target="_blank" class="learn-more">Learn more</a></li><li><a href="#browser-kompatibilität" data-glean="baseline_link_bcd_table">See full compatibility</a></li><li><a href="https://survey.alchemer.com/s3/7634825/MDN-baseline-feedback?page=%2Fde%2Fdocs%2FWeb%2FJavaScript%2FReference%2FOperators%2Fnull&level=high" data-glean="baseline_link_feedback" class="feedback-link" target="_blank" rel="noreferrer">Report feedback</a></li></ul></div></details></header><div class="section-content"><p>Der Wert <strong><code>null</code></strong> repräsentiert das absichtliche Fehlen eines Objektwertes. Er ist einer der <a href="/de/docs/Glossary/Primitive">primitiven Werte</a> von JavaScript und wird in booleschen Operationen als <a href="/de/docs/Glossary/Falsy">falsch</a> behandelt.</p></div><section aria-labelledby="probieren_sie_es_aus"><h2 id="probieren_sie_es_aus"><a href="#probieren_sie_es_aus">Probieren Sie es aus</a></h2><div class="section-content"><iframe class="interactive is-js-height" height="200" src="https://interactive-examples.mdn.mozilla.net/pages/js/globalprops-null.html" title="MDN Web Docs Interactive Example" allow="clipboard-write" loading="lazy"></iframe></div></section><section aria-labelledby="syntax"><h2 id="syntax"><a href="#syntax">Syntax</a></h2><div class="section-content"><div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>null </code></pre></div></div></section><section aria-labelledby="beschreibung"><h2 id="beschreibung"><a href="#beschreibung">Beschreibung</a></h2><div class="section-content"><p>Der Wert <code>null</code> wird mit einem Literal geschrieben: <code>null</code>. <code>null</code> ist kein Bezeichner für eine Eigenschaft des globalen Objekts, wie es <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/undefined"><code>undefined</code></a> sein kann. Stattdessen drückt <code>null</code> einen Mangel an Identifizierung aus, was darauf hinweist, dass eine Variable auf kein Objekt zeigt. In APIs wird <code>null</code> oft an einer Stelle zurückgegeben, an der ein Objekt erwartet werden kann, aber kein Objekt relevant ist.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>// foo does not exist. It is not defined and has never been initialized: foo; //ReferenceError: foo is not defined </code></pre></div> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>// foo is known to exist now but it has no type or value: const foo = null; foo; //null </code></pre></div></div></section><section aria-labelledby="beispiele"><h2 id="beispiele"><a href="#beispiele">Beispiele</a></h2><div class="section-content"></div></section><section aria-labelledby="unterschied_zwischen_null_und_undefined"><h3 id="unterschied_zwischen_null_und_undefined"><a href="#unterschied_zwischen_null_und_undefined">Unterschied zwischen <code>null</code> und <code>undefined</code></a></h3><div class="section-content"><p>Beim Überprüfen von <code>null</code> oder <code>undefined</code> sollten Sie die <a href="/de/docs/Web/JavaScript/Reference/Operators">Unterschiede zwischen Gleichheits- (==) und Identitätsoperatoren (===)</a> beachten, da ersteres eine Typumwandlung durchführt.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>typeof null; // "object" (not "null" for legacy reasons) typeof undefined; // "undefined" null === undefined; // false null == undefined; // true null === null; // true null == null; // true !null; // true Number.isNaN(1 + null); // false Number.isNaN(1 + undefined); // true </code></pre></div></div></section><h2 id="spezifikationen"><a href="#spezifikationen">Spezifikationen</a></h2><table class="standard-table"><thead><tr><th scope="col">Specification</th></tr></thead><tbody><tr><td><a href="https://tc39.es/ecma262/multipage/overview.html#sec-null-value">ECMAScript Language Specification <br/><small># sec-null-value</small></a></td></tr></tbody></table><h2 id="browser-kompatibilität"><a href="#browser-kompatibilität">Browser-Kompatibilität</a></h2><p>BCD tables only load in the browser<noscript> with JavaScript enabled. Enable JavaScript to view data.</noscript></p><section aria-labelledby="siehe_auch"><h2 id="siehe_auch"><a href="#siehe_auch">Siehe auch</a></h2><div class="section-content"><ul> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/undefined"><code>undefined</code></a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/NaN"><code>NaN</code></a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators/void"><code>void</code></a></li> </ul></div></section></article><aside class="article-footer"><div class="article-footer-inner"><div class="svg-container"><svg xmlns="http://www.w3.org/2000/svg" width="162" height="162" viewBox="0 0 162 162" fill="none" role="none"><mask id="b" fill="#fff"><path d="M97.203 47.04c8.113-7.886 18.004-13.871 28.906-17.492a78 78 0 0 1 33.969-3.39c11.443 1.39 22.401 5.295 32.024 11.411s17.656 14.28 23.476 23.86c5.819 9.579 9.269 20.318 10.083 31.385a69.85 69.85 0 0 1-5.387 32.44c-4.358 10.272-11.115 19.443-19.747 26.801-8.632 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href=\"/de/docs/Learn/Getting_started_with_the_web/JavaScript_basics\">JavaScript-Grundlagen</a></li>\n <li><a href=\"/de/docs/Learn/JavaScript/First_steps\">Erste Schritte in JavaScript</a></li>\n <li><a href=\"/de/docs/Learn/JavaScript/Building_blocks\">JavaScript-Bausteine</a></li>\n <li><a href=\"/de/docs/Learn/JavaScript/Objects\">Einführung in JavaScript-Objekte</a></li>\n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>JavaScript-Handbuch</summary>\n <ol>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Introduction\">Einführung</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Grammar_and_types\">Grammatik und Typen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Control_flow_and_error_handling\">Steuerfluss und Fehlerbehandlung</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Loops_and_iteration\">Schleifen und Iteration</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Functions\">Funktionen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Expressions_and_operators\">Ausdrücke und Operatoren</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Numbers_and_dates\">Zahlen und Daten</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Text_formatting\">Textformatierung</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Regular_expressions\">Reguläre Ausdrücke</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Indexed_collections\">Indexierte Sammlungen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Keyed_collections\">Gekennzeichnete Sammlungen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Working_with_objects\">Arbeiten mit Objekten</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Using_classes\">Verwendung von Klassen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Using_promises\">Verwendung von Promises</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Typed_arrays\">Typisierte Arrays in JavaScript</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Iterators_and_generators\">Iteratoren und Generatoren</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Meta_programming\">Metaprogrammierung</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Guide/Modules\">JavaScript-Module</a></li>\n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Mittelstufe</summary>\n <ol>\n <li><a href=\"/de/docs/Learn/Tools_and_testing/Client-side_JavaScript_frameworks\">Client-seitige JavaScript-Frameworks</a></li>\n <li><a href=\"/de/docs/Learn/JavaScript/Client-side_web_APIs\">Client-seitige Web-APIs</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Language_overview\">Sprachübersicht</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Data_structures\">JavaScript-Datenstrukturen</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Equality_comparisons_and_sameness\">Gleichheitsvergleiche und Gleichheit</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Enumerability_and_ownership_of_properties\">Aufzählbarkeit und Eigentum von Eigenschaften</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Closures\">Closures</a></li>\n </ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Fortgeschritten</summary>\n <ol>\n <li><a href=\"/de/docs/Web/JavaScript/Inheritance_and_the_prototype_chain\">Vererbung und die Prototypenkette</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Memory_management\">Speicherverwaltung</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Event_loop\">Konkurrenzmodell und Ereignisschleife</a></li>\n </ol>\n </details>\n </li>\n <li class=\"section\"><a href=\"/de/docs/Web/JavaScript/Reference\">Referenzen</a></li>\n <li class=\"toggle\">\n <details>\n <summary>Eingebaute Objekte</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects\">Standard eingebaute Objekte</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/AggregateError\">AggregateError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Array\">Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer\">ArrayBuffer</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncFunction\">AsyncFunction</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncGenerator\">AsyncGenerator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncGeneratorFunction\">AsyncGeneratorFunction</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/AsyncIterator\">AsyncIterator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Atomics\">Atomics</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt\">BigInt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array\">BigInt64Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigUint64Array\">BigUint64Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean\">Boolean</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/DataView\">DataView</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Date\">Date</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/decodeURI\">decodeURI()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent\">decodeURIComponent()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/encodeURI\">encodeURI()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/encodeURIComponent\">encodeURIComponent()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Error\">Error</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/escape\">escape()</a><abbr class=\"icon icon-deprecated\" title=\"Veraltet. Nicht für neue Websites verwenden.\">\n <span class=\"visually-hidden\">Veraltet</span>\n</abbr></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/eval\">eval()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/EvalError\">EvalError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/FinalizationRegistry\">FinalizationRegistry</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Float16Array\">Float16Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Float32Array\">Float32Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Float64Array\">Float64Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function\">Function</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Generator\">Generator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/GeneratorFunction\">GeneratorFunction</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/globalThis\">globalThis</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Infinity\">Infinity</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Int16Array\">Int16Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Int32Array\">Int32Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Int8Array\">Int8Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/InternalError\">InternalError</a><abbr class=\"icon icon-nonstandard\" title=\"Nicht standardisiert. Überprüfen Sie die Unterstützung in verschiedenen Browsern, bevor Sie es verwenden.\">\n <span class=\"visually-hidden\">Nicht standardisiert</span>\n</abbr></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Intl\">Intl</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/isFinite\">isFinite()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/isNaN\">isNaN()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Iterator\">Iterator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/JSON\">JSON</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Map\">Map</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Math\">Math</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/NaN\">NaN</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number\">Number</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object\">Object</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/parseFloat\">parseFloat()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/parseInt\">parseInt()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Promise\">Promise</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Proxy\">Proxy</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/RangeError\">RangeError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/ReferenceError\">ReferenceError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Reflect\">Reflect</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/RegExp\">RegExp</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Set\">Set</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer\">SharedArrayBuffer</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/String\">String</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol\">Symbol</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError\">SyntaxError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypedArray\">TypedArray</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError\">TypeError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array\">Uint16Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array\">Uint32Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array\">Uint8Array</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray\">Uint8ClampedArray</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/undefined\">undefined</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/unescape\">unescape()</a><abbr class=\"icon icon-deprecated\" title=\"Veraltet. Nicht für neue Websites verwenden.\">\n <span class=\"visually-hidden\">Veraltet</span>\n</abbr></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/URIError\">URIError</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/WeakMap\">WeakMap</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/WeakRef\">WeakRef</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/WeakSet\">WeakSet</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details open=\"\">\n <summary>Ausdrücke und Operatoren</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators\">Ausdrücke und Operatoren</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Addition\">Addition (+)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Addition_assignment\">Addition Assignment (+=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Assignment\">Zuweisung (=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/async_function\">async function expression</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/async_function*\">async function* Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/await\">await</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_AND\">Bitweises UND (&)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_AND_assignment\">Bitweise UND-Zuweisung (&=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_NOT\">Bitweise NOT (~)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_OR\">Bitweises Oder (|)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_OR_assignment\">Bitweises OR-Zuweisung (|=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR\">Bitweises XOR (^)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Bitwise_XOR_assignment\">Bitweises XOR-Zuweisung (^=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/class\">Klassenausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Comma_operator\">Komma-Operator (,)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Conditional_operator\">Bedingungsoperator (ternärer Operator)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Decrement\">Decrement (--)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/delete\">delete</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment\">Destructuring-Zuweisung</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Division\">Division (/)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Division_assignment\">Division assignment (/=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Equality\">Gleichheit (==)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Exponentiation\">Potenzierung (**)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Exponentiation_assignment\">Exponentiation-Zuweisung (**=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/function\">function expression</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/function*\">function* Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Greater_than\">Greater than (>)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Greater_than_or_equal\">Greater than or equal (>=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Grouping\">Gruppierungsoperator ( )</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/import.meta\">import.meta</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/import\">import()</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/in\">in</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Increment\">Increment (++)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Inequality\">Inequality (!=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/instanceof\">instanceof</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Left_shift\">Left shift (<<)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Left_shift_assignment\">Left shift assignment (<<=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Less_than\">Less than (<)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Less_than_or_equal\">Less than or equal (<=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Logical_AND\">Logisches UND (&&)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Logical_AND_assignment\">Logical AND assignment (&&=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Logical_NOT\">Logisches NICHT (!)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Logical_OR\">Logical OR (||)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Logical_OR_assignment\">Logische ODER-Zuweisung (||=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Multiplication\">Multiplication (*)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Multiplication_assignment\">Multiplikationszuweisung (*=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/new\">new</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/new.target\">new.target</a></li><li><em><a href=\"/de/docs/Web/JavaScript/Reference/Operators/null\" aria-current=\"page\">null</a></em></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_assignment\">Nullish coalescing assignment (??=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing\">Nullish coalescing-Operator (??)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Object_initializer\">Object initializer</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Operator_precedence\">Operatorpriorität</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Optional_chaining\">Optional Chaining (?.)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Property_accessors\">Property accessors</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Remainder\">Remainder (%)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Remainder_assignment\">Remainder-Zuweisung (%=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Right_shift\">Rechtsschiebung (>>)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Right_shift_assignment\">Right shift assignment (>>=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Spread_syntax\">Spread-Syntax (...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Strict_equality\">Strikte Gleichheit (===)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Strict_inequality\">Strikte Ungleichheit (!==)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Subtraction\">Subtraction (-)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Subtraction_assignment\">Subtraction assignment (-=)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/super\">super</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/this\">this</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/typeof\">typeof</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unary_negation\">Unäre Negation (-)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unary_plus\">Unary plus (+)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift\">Unsigned right shift (>>>)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift_assignment\">Unsigned right shift assignment (`>>>=`)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/void\">void operator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/yield\">yield</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/yield*\">yield*</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Anweisungen und Deklarationen</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements\">Statements und Deklarationen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/async_function\">async function</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/async_function*\">async function*</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/block\">Block Statement</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/break\">break</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/class\">class</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/const\">const</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/continue\">continue</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/debugger\">debugger</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/do...while\">do...while</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/Empty\">Empty Statement</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/export\">export</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/Expression_statement\">Expression statement</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/for\">for</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/for-await...of\">for await...of</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/for...in\">for...in</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/for...of\">for...of</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/function\">function</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/function*\">function*</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/if...else\">if...else</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/import\">import</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/label\">Labelierte Anweisung</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/let\">let</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/return\">return</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/switch\">switch</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/throw\">throw</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/try...catch\">try...catch</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/var\">var</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/while\">while</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Statements/with\">with</a><abbr class=\"icon icon-deprecated\" title=\"Veraltet. Nicht für neue Websites verwenden.\">\n <span class=\"visually-hidden\">Veraltet</span>\n</abbr></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Funktionen</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions\">Functions</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/Arrow_functions\">Pfeilfunktionen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/Default_parameters\">Default parameters</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/get\">get</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/Method_definitions\">Methodendefinitionen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/rest_parameters\">Rest-Parameter</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/set\">set</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Functions/arguments\">Das arguments Objekt</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Klassen</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes\">Klassen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/constructor\">constructor</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/extends\">extends</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/Private_properties\">Private properties</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/Public_class_fields\">Public class fields</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/static\">static</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Classes/Static_initialization_blocks\">Statische Initialisierungsblöcke</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Reguläre Ausdrücke</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions\">Regular expressions</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Backreference\">Backreference: \\1, \\2</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Capturing_group\">Capturing group: (...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape\">Zeichenklassen-Escape: \\d, \\D, \\w, \\W, \\s, \\S</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_class\">Zeichenklasse: [...], [^...]</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Character_escape\">Zeichen-Escape: \\n, \\u{...}</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Disjunction\">Disjunktion: |</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Input_boundary_assertion\">Input-Bereichs-Assertion: ^, $</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character\">Literalzeichen: a, b</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Lookahead_assertion\">Lookahead-Assertion: (?=...), (?!...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Lookbehind_assertion\">Lookbehind Assertion: (?<=...), (?<!...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Modifier\">Modifikator: (?ims-ims:...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Named_backreference\">Benannte Rückreferenz: \\k<name></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Named_capturing_group\">Named capturing group: (?<name>...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Non-capturing_group\">Nicht erfassende Gruppe: (?:...)</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Quantifier\">Quantifier: *, +, ?, {n}, {n,}, {n,m}</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Unicode_character_class_escape\">Unicode-Zeichenklassenescapes: \\p{...}, \\P{...}</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Wildcard\">Wildcard: .</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Regular_expressions/Word_boundary_assertion\">Wortgrenzen-Assertion: \\b, \\B</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Fehler</summary>\n <ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors\">JavaScript-Fehlerreferenz</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Promise_any_all_rejected\">AggregateError: Kein Promise in Promise.any wurde aufgelöst</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Property_access_denied\">Fehler: Zugriff verweigert auf Eigenschaft \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Too_much_recursion\">InternalError: zu viel Rekursion</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Not_a_valid_code_point\">RangeError: argument ist kein gültiger Codepunkt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/BigInt_division_by_zero\">RangeError: BigInt-Division durch Null</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/BigInt_negative_exponent\">RangeError: BigInt negative exponent</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Form_must_be_one_of\">RangeError: form muss einer von 'NFC', 'NFD', 'NFKC' oder 'NFKD' sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_array_length\">RangeError: invalid array length</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_date\">RangeError: invalid date</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Precision_range\">RangeError: precision liegt außerhalb des zulässigen Bereichs</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_radix\">RangeError: radix muss eine ganze Zahl sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Resulting_string_too_large\">RangeError: repeat count muss kleiner als unendlich sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Negative_repetition_count\">RangeError: repeat count must be non-negative</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_be_converted_to_BigInt_because_it_isnt_an_integer\">RangeError: x kann nicht in BigInt konvertiert werden, da es keine ganze Zahl ist</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Not_defined\">ReferenceError: \"x\" ist nicht definiert</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Undeclared_var\">ReferenceError: Zuordnung zu einer nicht deklarierten Variable \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_access_lexical_declaration_before_init\">ReferenceError: kann auf lexikalische Deklaration 'X' vor der Initialisierung nicht zugreifen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Deprecated_caller_or_arguments_usage\">ReferenceError: veraltete Verwendung von caller oder arguments</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Super_not_called\">ReferenceError: 'super' Konstruktor muss vor der Verwendung von 'this' im Konstruktor der abgeleiteten Klasse aufgerufen werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Super_called_twice\">ReferenceError: super() zweimal im abgeleiteten Klassenkonstruktor aufgerufen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_strict_arguments_eval\">SyntaxError: 'arguments'/'eval' können im Strict-Mode-Code nicht definiert oder zugewiesen werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_literal\">SyntaxError: \"0\"-präfixierte Oktalliterale sind veraltet</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Strict_non_simple_params\">SyntaxError: \"use strict\" nicht erlaubt in Funktion mit nicht einfachen Parametern</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Reserved_identifier\">SyntaxError: \"x\" ist ein reservierter Bezeichner</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_backslash_at_end_of_pattern\">SyntaxError: \\ am Ende des Musters</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_for-of_initializer\">SyntaxError: Eine Deklaration im Kopf einer for-of-Schleife darf keinen Initialisierer haben</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Delete_in_strict_mode\">SyntaxError: Die Anwendung des 'delete'-Operators auf einen unqualifizierten Namen ist veraltet</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Arguments_not_allowed\">SyntaxError: arguments ist in Feldern nicht gültig</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_await\">SyntaxError: await ist nur in async Funktionen, async Generatoren und Modulen gültig</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/await_yield_in_parameter\">SyntaxError: await/yield expression kann nicht im Parameter verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_use_nullish_coalescing_unparenthesized\">SyntaxError: `??` kann nicht ohne Klammern innerhalb von `||` und `&&`-Ausdrücken verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_character_class_escape_in_class_range\">SyntaxError: Zeichenklassen-Escape kann nicht im Klassenbereich im regulären Ausdruck verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_continue\">SyntaxError: continue muss innerhalb einer Schleife sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_duplicate_capture_group_name\">SyntaxError: doppelter Name der Erfassungsgruppe im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Duplicate_parameter\">SyntaxError: doppeltes formales Argument x</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_for-in_initializer\">SyntaxError: Deklarationen im Kopf einer for-in-Schleife dürfen keine Initialisierer enthalten</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Unnamed_function_statement\">SyntaxError: Funktionsanweisung erfordert einen Namen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Function_label\">SyntaxError: Funktionen können nicht beschriftet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Either_be_both_static_or_non-static\">SyntaxError: Getter und Setter für privaten Namen #x sollten entweder beide statisch oder nicht statisch sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Getter_no_arguments\">SyntaxError: Getter-Funktionen dürfen keine Argumente haben</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Identifier_after_number\">SyntaxError: identifier startet direkt nach einer numerischen Literal</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Illegal_character\">SyntaxError: illegales Zeichen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/import_decl_module_top_level\">SyntaxError: import-Deklarationen dürfen nur auf der obersten Ebene eines Moduls erscheinen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_incomplete_quantifier\">SyntaxError: unvollständiger Quantifizierer im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_assignment_left-hand_side\">SyntaxError: invalid assignment left-hand side</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_BigInt_syntax\">SyntaxError: Ungültige BigInt-Syntax</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_capture_group_name\">SyntaxError: ungültiger Name der Erfassungsgruppe im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_char_in_class\">SyntaxError: ungültiges Zeichen in Klasse in regulärem Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_class_set_operation\">SyntaxError: Ungültige Klassenmengenoperation im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_decimal_escape\">SyntaxError: ungültiger Dezimal-Escape in regulärem Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_identity_escape\">SyntaxError: ungültige Identitätsflucht in regulärem Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_named_capture_reference\">SyntaxError: ungültige benannte Referenz in regulärem Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_property_name\">SyntaxError: ungültiger Eigenschaftsname im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_range_in_character_class\">SyntaxError: invalid range in character class</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_group\">SyntaxError: invalid regexp group</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_regexp_flag\">SyntaxError: invalid regular expression flag \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_invalid_unicode_escape\">SyntaxError: ungültiger Unicode-Escape in regulärem Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse\">SyntaxError: JSON.parse: Fehlerhaftes Parsing</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Label_not_found\">SyntaxError: label not found</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_colon_after_property_id\">SyntaxError: missing : after property id</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_argument_list\">SyntaxError: missing ) after argument list</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_parenthesis_after_condition\">SyntaxError: missing ) after condition</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_bracket_after_list\">SyntaxError: missing ] after element list</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_function_body\">SyntaxError: fehlende } nach Funktionskörper</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_curly_after_property_list\">SyntaxError: missing } after property list</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_initializer_in_const\">SyntaxError: missing = in const declaration</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_formal_parameter\">SyntaxError: missing formal parameter</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Missing_name_after_dot_operator\">SyntaxError: missing name after . operator</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/No_variable_name\">SyntaxError: missing variable name</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_negated_char_class_with_strings\">SyntaxError: Negierte Zeichenklasse mit Strings im regulären Ausdruck</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_new_optional\">SyntaxError: new-Schlüsselwort kann nicht mit einer Optionalen Kette verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_nothing_to_repeat\">SyntaxError: nothing to repeat</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_numbers_out_of_order_in_quantifier\">SyntaxError: numbers out of order in {} quantifier.</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Deprecated_octal_escape_sequence\">SyntaxError: Oktale Escape-Sequenzen können nicht in nicht-getaggten Vorlagenliteralen oder im Strict Mode-Code verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Parameter_after_rest_parameter\">SyntaxError: parameter nach Rest-Parameter</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_delete_private_fields\">SyntaxError: private fields können nicht gelöscht werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Duplicate_proto\">SyntaxError: Eigenschaftenname __proto__ erscheint mehr als einmal im Objektliteral</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Regex_raw_bracket\">SyntaxError: Raw-Klammern sind im regulären Ausdruck mit Unicode-Flag nicht erlaubt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Redeclared_parameter\">SyntaxError: redeclaration of formal parameter \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Undeclared_private_field_or_method\">SyntaxError: Verweis auf nicht deklariertes privates Feld oder Methode #x</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Rest_with_default\">SyntaxError: Restparameter darf keinen Standardwert haben</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_return\">SyntaxError: return not in function</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Setter_one_argument\">SyntaxError: Setter-Funktionen müssen ein Argument haben</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/String_literal_EOL\">SyntaxError: string literal enthält einen nicht-escaped Zeilenumbruch</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_super_call\">SyntaxError: super() ist nur in Konstruktoren abgeleiteter Klassen gültig</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_optional_template\">SyntaxError: getaggtes Template kann nicht mit optionaler Verkettung verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Hash_outside_class\">SyntaxError: Unerwartetes '#' außerhalb des Klassenkörpers verwendet</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Unexpected_token\">SyntaxError: Unerwartetes Token</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_break\">SyntaxError: unlabeled break muss innerhalb einer Schleife oder eines Switch sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Unparenthesized_unary_expr_lhs_exponentiation\">SyntaxError: unverklammerter unärer Ausdruck kann nicht auf der linken Seite von '**' erscheinen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Bad_super_prop\">SyntaxError: Verwendung von Super-Eigenschaften/-mitgliedern ist nur innerhalb von Methoden oder eval-Code innerhalb von Methoden gültig</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Deprecated_source_map_pragma\">SyntaxError: Die Verwendung von //@ zur Angabe von sourceURL-Pragmas ist veraltet. Verwenden Sie stattdessen //#</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/is_not_iterable\">TypeError: 'x' ist nicht iterierbar</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Unexpected_type\">TypeError: \"x\" ist (nicht) \"y\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Not_a_constructor\">TypeError: \"x\" ist kein Konstruktor</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Not_a_function\">TypeError: \"x\" ist keine Funktion</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/No_non-null_object\">TypeError: \"x\" ist kein nicht-null-Objekt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Read-only\">TypeError: \"x\" ist schreibgeschützt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/BigInt_not_serializable\">TypeError: BigInt-Wert kann nicht in JSON serialisiert werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Builtin_ctor_no_new\">TypeError: Der Aufruf eines eingebauten X-Konstruktors ohne new ist verboten</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Get_set_missing_private\">TypeError: kann nicht auf privates Feld oder Methode zugreifen/setzen: Objekt ist nicht die richtige Klasse</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_assign_to_property\">TypeError: kann Eigenschaft „x“ auf „y“ nicht zuweisen: kein Objekt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_convert_BigInt_to_number\">TypeError: can't convert BigInt to number</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_convert_x_to_BigInt\">TypeError: kann x nicht in BigInt konvertieren</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_define_property_object_not_extensible\">TypeError: kann Eigenschaft \"x\" nicht definieren: \"obj\" ist nicht erweiterbar</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Non_configurable_array_element\">TypeError: can't delete non-configurable array element</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_redefine_property\">TypeError: kann nicht konfigurierbare Eigenschaft \"x\" neu definieren</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_set_prototype\">TypeError: kann das Prototyp dieses Objekts nicht festlegen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cyclic_prototype\">TypeError: can't set prototype: it would cause a prototype chain cycle</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/in_operator_no_object\">TypeError: kann den 'in'-Operator nicht verwenden, um nach 'x' in 'y' zu suchen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Class_ctor_no_new\">TypeError: Klassenkonstruktoren müssen mit 'new' aufgerufen werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value\">TypeError: cyclic object value</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_derived_return\">TypeError: abgeleiteter Klassenkonstruktor hat einen ungültigen Wert x zurückgegeben</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Private_setter_only\">TypeError: getting private setter-only property</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Private_double_initialization\">TypeError: Initialisierung eines Objekts zweimal ist ein Fehler bei privaten Feldern/Methoden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/invalid_right_hand_side_instanceof_operand\">TypeError: ungültiger 'instanceof'-Operand 'x'</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Array_sort_argument\">TypeError: invalides Array.prototype.sort Argument</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Invalid_const_assignment\">TypeError: ungültige Zuweisung zu const \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Constructor_cant_be_used_directly\">TypeError: Iterator/AsyncIterator-Konstruktor kann nicht direkt verwendet werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Requires_global_RegExp\">TypeError: matchAll/replaceAll muss mit einem globalen RegExp aufgerufen werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/More_arguments_needed\">TypeError: Mehr Argumente benötigt</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/No_properties\">TypeError: null/undefined hat keine Eigenschaften</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Cant_delete\">TypeError: Eigenschaft \"x\" ist nicht konfigurierbar und kann nicht gelöscht werden</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Reduce_of_empty_array_with_no_initial_value\">TypeError: Reduce eines leeren Arrays ohne initialen Wert</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Getter_only\">TypeError: Einstellung der nur-Getter-Eigenschaft \"x\"</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Key_not_weakly_held\">TypeError: WeakSet-Schlüssel/WeakMap-Wert 'x' muss ein Objekt oder ein nicht registriertes Symbol sein</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Called_on_incompatible_type\">TypeError: X.prototype.y auf inkompatiblen Typ aufgerufen</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Malformed_URI\">URIError: malformed URI sequence</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Already_has_pragma\">Warnung: -file- wird ein //# sourceMappingURL zugewiesen, hat aber bereits eines</a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Errors/Stmt_after_return\">Warnung: unerreichbarer Code nach return-Anweisung</a></li></ol>\n </details>\n </li>\n <li class=\"toggle\">\n <details>\n <summary>Sonstiges</summary>\n <ol>\n <li><a href=\"/de/docs/Web/JavaScript/JavaScript_technologies_overview\">JavaScript-Technologie (Übersicht)</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Lexical_grammar\">Lexikalische Grammatik</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Iteration_protocols\">Iterationsprotokolle</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Strict_mode\">Strenger Modus</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Template_literals\">Vorlagenliterale</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Trailing_commas\">Abschließende Kommas</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Deprecated_and_obsolete_features\">Veraltete Funktionen</a></li>\n </ol>\n </details>\n </li>\n </ol>\n","sidebarMacro":"JsSidebar","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p>Der Wert <strong><code>null</code></strong> repräsentiert das absichtliche Fehlen eines Objektwertes. Er ist einer der <a href=\"/de/docs/Glossary/Primitive\">primitiven Werte</a> von JavaScript und wird in booleschen Operationen als <a href=\"/de/docs/Glossary/Falsy\">falsch</a> behandelt.</p>"}},{"type":"prose","value":{"id":"probieren_sie_es_aus","title":"Probieren Sie es aus","isH3":false,"content":"<iframe class=\"interactive is-js-height\" height=\"200\" src=\"https://interactive-examples.mdn.mozilla.net/pages/js/globalprops-null.html\" title=\"MDN Web Docs Interactive Example\" allow=\"clipboard-write\" loading=\"lazy\"></iframe>"}},{"type":"prose","value":{"id":"syntax","title":"Syntax","isH3":false,"content":"<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>null\n</code></pre></div>"}},{"type":"prose","value":{"id":"beschreibung","title":"Beschreibung","isH3":false,"content":"<p>Der Wert <code>null</code> wird mit einem Literal geschrieben: <code>null</code>. <code>null</code> ist kein Bezeichner für eine Eigenschaft des globalen Objekts, wie es <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/undefined\"><code>undefined</code></a> sein kann. Stattdessen drückt <code>null</code> einen Mangel an Identifizierung aus, was darauf hinweist, dass eine Variable auf kein Objekt zeigt. In APIs wird <code>null</code> oft an einer Stelle zurückgegeben, an der ein Objekt erwartet werden kann, aber kein Objekt relevant ist.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>// foo does not exist. It is not defined and has never been initialized:\nfoo; //ReferenceError: foo is not defined\n</code></pre></div>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>// foo is known to exist now but it has no type or value:\nconst foo = null;\nfoo; //null\n</code></pre></div>"}},{"type":"prose","value":{"id":"beispiele","title":"Beispiele","isH3":false,"content":""}},{"type":"prose","value":{"id":"unterschied_zwischen_null_und_undefined","title":"Unterschied zwischen <code>null</code> und <code>undefined</code>","isH3":true,"content":"<p>Beim Überprüfen von <code>null</code> oder <code>undefined</code> sollten Sie die <a href=\"/de/docs/Web/JavaScript/Reference/Operators\">Unterschiede zwischen Gleichheits- (==) und Identitätsoperatoren (===)</a> beachten, da ersteres eine Typumwandlung durchführt.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>typeof null; // \"object\" (not \"null\" for legacy reasons)\ntypeof undefined; // \"undefined\"\nnull === undefined; // false\nnull == undefined; // true\nnull === null; // true\nnull == null; // true\n!null; // true\nNumber.isNaN(1 + null); // false\nNumber.isNaN(1 + undefined); // true\n</code></pre></div>"}},{"type":"specifications","value":{"title":"Spezifikationen","id":"spezifikationen","isH3":false,"specifications":[{"bcdSpecificationURL":"https://tc39.es/ecma262/multipage/overview.html#sec-null-value","title":"ECMAScript Language Specification"}],"query":"javascript.operators.null"}},{"type":"browser_compatibility","value":{"title":"Browser-Kompatibilität","id":"browser-kompatibilität","isH3":false,"query":"javascript.operators.null"}},{"type":"prose","value":{"id":"siehe_auch","title":"Siehe auch","isH3":false,"content":"<ul>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/undefined\"><code>undefined</code></a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/NaN\"><code>NaN</code></a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/void\"><code>void</code></a></li>\n</ul>"}}],"toc":[{"text":"Probieren Sie es aus","id":"probieren_sie_es_aus"},{"text":"Syntax","id":"syntax"},{"text":"Beschreibung","id":"beschreibung"},{"text":"Beispiele","id":"beispiele"},{"text":"Spezifikationen","id":"spezifikationen"},{"text":"Browser-Kompatibilität","id":"browser-kompatibilität"},{"text":"Siehe auch","id":"siehe_auch"}],"summary":"Der Wert null repräsentiert das absichtliche Fehlen eines Objektwertes. Er ist einer der primitiven Werte von JavaScript und wird in booleschen Operationen als falsch behandelt.","popularity":0,"modified":"2022-08-14T03:39:57.000Z","other_translations":[{"locale":"en-US","title":"null","native":"English (US)"},{"locale":"es","title":"null","native":"Español"},{"locale":"fr","title":"null","native":"Français"},{"locale":"ja","title":"null","native":"日本語"},{"locale":"ko","title":"null","native":"한국어"},{"locale":"pt-BR","title":"null","native":"Português (do Brasil)"},{"locale":"ru","title":"null","native":"Русский"},{"locale":"zh-CN","title":"null","native":"中文 (简体)"}],"pageType":"unknown","source":{"folder":"de/web/javascript/reference/operators/null","github_url":"https://github.com/mdn/translated-content/blob/main/files/de/web/javascript/reference/operators/null/index.md","last_commit_url":"https://github.com/mdn/translated-content/commit/aebcbfc2355fccddc193e6b25ba720935bf90172","filename":"index.md"},"short_title":"null","parents":[{"uri":"/de/docs/Web","title":"Web-Technologien für Entwickler"},{"uri":"/de/docs/Web/JavaScript","title":"JavaScript"},{"uri":"/de/docs/Web/JavaScript/Reference","title":"JavaScript-Referenz"},{"uri":"/de/docs/Web/JavaScript/Reference/Operators","title":"Ausdrücke und Operatoren"},{"uri":"/de/docs/Web/JavaScript/Reference/Operators/null","title":"null"}],"pageTitle":"null - JavaScript | MDN","noIndexing":false}}</script></body></html>