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data-macro="JSRef"><button type="button" class="button action backdrop" aria-label="Collapse sidebar"><span class="button-wrap"></span></button><nav aria-label="Related Topics" class="sidebar-inner"><header 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="#beschreibung">Beschreibung</a></li><li class="document-toc-item "><a class="document-toc-link" href="#konstruktor">Konstruktor</a></li><li class="document-toc-item "><a class="document-toc-link" href="#statische_methoden">Statische Methoden</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instanzvariablen">Instanzvariablen</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instanzmethoden">Instanzmethoden</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/Reference/Global_Objects">Globale Objekte</a></li><li class="section"><em><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt" aria-current="page"><code>BigInt</code></a></em></li><li><details open=""><summary>Konstruktor</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt"><code>BigInt() Konstruktor</code></a></li></ol></details></li><li><details open=""><summary>Statische Methoden</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN"><code>BigInt.asIntN()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN"><code>BigInt.asUintN()</code></a></li></ol></details></li><li><details open=""><summary>Instanzmethoden</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toLocaleString"><code>BigInt.prototype.toLocaleString()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString"><code>BigInt.prototype.toString()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/valueOf"><code>BigInt.prototype.valueOf()</code></a></li></ol></details></li><li class="section no-link">Vererbung</li><li class="section"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object"><code>Object/Function</code></a></li><li><details><summary>Statische Methoden</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/apply"><code>Function.prototype.apply()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/bind"><code>Function.prototype.bind()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/call"><code>Function.prototype.call()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/Symbol.hasInstance"><code>Function.prototype[Symbol.hasInstance]()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/toString"><code>Function.prototype.toString()</code></a></li></ol></details></li><li><details><summary>Statische Eigenschaften</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/arguments"><code>Function.prototype.arguments</code></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><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/Function/caller"><code>Function.prototype.caller</code></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><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/Function/displayName"><code>Function: displayName</code></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/Function/length"><code>Function: length</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/name"><code>Function: name</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/prototype"><code>Function: prototype</code></a></li></ol></details></li><li><details><summary>Instanzmethoden</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__"><code>Object.prototype.__defineGetter__()</code></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/Object/__defineSetter__"><code>Object.prototype.__defineSetter__()</code></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/Object/__lookupGetter__"><code>Object.prototype.__lookupGetter__()</code></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/Object/__lookupSetter__"><code>Object.prototype.__lookupSetter__()</code></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/Object/hasOwnProperty"><code>Object.prototype.hasOwnProperty()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf"><code>Object.prototype.isPrototypeOf()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable"><code>Object.prototype.propertyIsEnumerable()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString"><code>Object.prototype.toLocaleString()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString"><code>Object.prototype.toString()</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf"><code>Object.prototype.valueOf()</code></a></li></ol></details></li><li><details><summary>Instanzeigenschaften</summary><ol><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor"><code>Object.prototype.constructor</code></a></li><li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/proto"><code>Object.prototype.__proto__</code></a><abbr class="icon icon-deprecated" title="Veraltet. Nicht für neue Websites verwenden."> <span class="visually-hidden">Veraltet</span> </abbr></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="#beschreibung">Beschreibung</a></li><li class="document-toc-item "><a class="document-toc-link" href="#konstruktor">Konstruktor</a></li><li class="document-toc-item "><a class="document-toc-link" href="#statische_methoden">Statische Methoden</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instanzvariablen">Instanzvariablen</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instanzmethoden">Instanzmethoden</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>BigInt</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 September 2020.</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%2FGlobal_Objects%2FBigInt&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><strong><code>BigInt</code></strong> Werte repräsentieren numerische Werte, die <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER">zu groß</a> sind, um durch den <code>number</code> <a href="/de/docs/Glossary/Primitive">Primitive</a> dargestellt zu werden.</p></div><section aria-labelledby="beschreibung"><h2 id="beschreibung"><a href="#beschreibung">Beschreibung</a></h2><div class="section-content"><p>Ein <strong>BigInt-Wert</strong>, manchmal einfach nur <strong>BigInt</strong> genannt, ist ein <code>bigint</code> <a href="/de/docs/Glossary/Primitive">Primitive</a>, das durch Anhängen von <code>n</code> an das Ende eines Ganzzahlliterals oder durch Aufrufen der <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt"><code>BigInt()</code></a> Funktion (ohne den <code>new</code> Operator) mit einem Ganzzahl- oder Zeichenkettenwert erstellt wird.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>const previouslyMaxSafeInteger = 9007199254740991n; const alsoHuge = BigInt(9007199254740991); // 9007199254740991n const hugeString = BigInt("9007199254740991"); // 9007199254740991n const hugeHex = BigInt("0x1fffffffffffff"); // 9007199254740991n const hugeOctal = BigInt("0o377777777777777777"); // 9007199254740991n const hugeBin = BigInt( "0b11111111111111111111111111111111111111111111111111111", ); // 9007199254740991n </code></pre></div> <p>BigInt-Werte sind in mancher Hinsicht ähnlich wie Number-Werte, unterscheiden sich jedoch in einigen wesentlichen Punkten: Ein BigInt-Wert kann nicht mit Methoden des eingebauten <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Math"><code>Math</code></a> Objekts verwendet werden und kann nicht mit einem Number-Wert in Operationen gemischt werden; sie müssen in denselben Typ umgewandelt werden. Seien Sie vorsichtig beim Konvertieren der Werte hin und her, da die Präzision eines BigInt-Werts möglicherweise verloren geht, wenn er in einen Number-Wert umgewandelt wird.</p></div></section><section aria-labelledby="typinformationen"><h3 id="typinformationen"><a href="#typinformationen">Typinformationen</a></h3><div class="section-content"><p>Bei einem Test gegen <code>typeof</code> ergibt ein BigInt-Wert (<code>bigint</code> Primitive) <code>"bigint"</code>:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>typeof 1n === "bigint"; // true typeof BigInt("1") === "bigint"; // true </code></pre></div> <p>Ein BigInt-Wert kann auch in einem <code>Object</code> verpackt werden:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>typeof Object(1n) === "object"; // true </code></pre></div></div></section><section aria-labelledby="operatoren"><h3 id="operatoren"><a href="#operatoren">Operatoren</a></h3><div class="section-content"><p>Die meisten Operatoren unterstützen BigInts, die meisten erlauben jedoch keine Operanden gemischten Typs — beide Operanden müssen entweder BigInt sein oder keines:</p> <ul> <li><a href="/de/docs/Web/JavaScript/Reference/Operators#arithmetic_operators">Arithmetische Operatoren</a>: <code>+</code>, <code>-</code>, <code>*</code>, <code>/</code>, <code>%</code>, <code>**</code></li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators#bitwise_shift_operators">Bitweise Operatoren</a>: <code>>></code>, <code><<</code>, <code>&</code>, <code>|</code>, <code>^</code>, <code>~</code></li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unary_negation">Unäres Minus (<code>-</code>)</a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators#increment_and_decrement">Inkrement/Dekrement</a>: <code>++</code>, <code>--</code></li> </ul> <p>Die booleschen Operatoren erlauben das Mischen von Numbers und BigInts als Operanden:</p> <ul> <li><a href="/de/docs/Web/JavaScript/Reference/Operators#relational_operators">Vergleichsoperatoren</a> und <a href="/de/docs/Web/JavaScript/Reference/Operators#equality_operators">Gleichheitsoperatoren</a>: <code>></code>, <code><</code>, <code>>=</code>, <code><=</code>, <code>==</code>, <code>!=</code>, <code>===</code>, <code>!==</code></li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators#binary_logical_operators">Logische Operatoren</a> beruhen nur auf der <a href="/de/docs/Glossary/Truthy">Wahrhaftigkeit</a> der Operanden</li> </ul> <p>Einige Operatoren unterstützen BigInt überhaupt nicht:</p> <ul> <li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unary_plus">Unäres Plus (<code>+</code>)</a> kann aufgrund der Konfliktnutzung in asm.js nicht unterstützt werden, sodass es <a href="https://github.com/tc39/proposal-bigint/blob/master/ADVANCED.md#dont-break-asmjs" class="external" target="_blank">um asm.js nicht zu brechen</a> weggelassen wurde.</li> <li><a href="/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift">Unsigned right shift (<code>>>></code>)</a> ist der einzige bitweise Operator, der nicht unterstützt wird, da jeder BigInt-Wert signiert ist.</li> </ul> <p>Spezialfälle:</p> <ul> <li>Addition (<code>+</code>) unter Beteiligung einer Zeichenkette und eines BigInt gibt eine Zeichenkette zurück.</li> <li>Division (<code>/</code>) kürzt Bruchanteile zu Null hin, da BigInt nicht in der Lage ist, Bruchmengen darzustellen.</li> </ul> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>const previousMaxSafe = BigInt(Number.MAX_SAFE_INTEGER); // 9007199254740991n const maxPlusOne = previousMaxSafe + 1n; // 9007199254740992n const theFuture = previousMaxSafe + 2n; // 9007199254740993n, this works now! const prod = previousMaxSafe * 2n; // 18014398509481982n const diff = prod - 10n; // 18014398509481972n const mod = prod % 10n; // 2n const bigN = 2n ** 54n; // 18014398509481984n bigN * -1n; // -18014398509481984n const expected = 4n / 2n; // 2n const truncated = 5n / 2n; // 2n, not 2.5n </code></pre></div></div></section><section aria-labelledby="vergleiche"><h3 id="vergleiche"><a href="#vergleiche">Vergleiche</a></h3><div class="section-content"><p>Ein BigInt-Wert ist nicht streng gleich einem Number-Wert, aber er ist es <em>locker</em>:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>0n === 0; // false 0n == 0; // true </code></pre></div> <p>Ein Number-Wert und ein BigInt-Wert können wie gewohnt verglichen werden:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>1n < 2; // true 2n > 1; // true 2 > 2; // false 2n > 2; // false 2n >= 2; // true </code></pre></div> <p>BigInt-Werte und Number-Werte können in Arrays gemischt und sortiert werden:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>const mixed = [4n, 6, -12n, 10, 4, 0, 0n]; // [4n, 6, -12n, 10, 4, 0, 0n] mixed.sort(); // default sorting behavior // [ -12n, 0, 0n, 10, 4n, 4, 6 ] mixed.sort((a, b) => a - b); // won't work since subtraction will not work with mixed types // TypeError: can't convert BigInt value to Number value // sort with an appropriate numeric comparator mixed.sort((a, b) => (a < b ? -1 : a > b ? 1 : 0)); // [ -12n, 0, 0n, 4n, 4, 6, 10 ] </code></pre></div> <p>Beachten Sie, dass Vergleiche mit <code>Object</code>-verpackten BigInt-Werten wie bei anderen Objekten nur Gleichheit anzeigen, wenn dieselbe Objektinstanz verglichen wird:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>Object(0n) === 0n; // false Object(0n) === Object(0n); // false const o = Object(0n); o === o; // true </code></pre></div> <p>Da das Konvertieren zwischen Number-Werten und BigInt-Werten zu einem Verlust der Präzision führen kann, wird Folgendes empfohlen:</p> <ul> <li>Verwenden Sie einen BigInt-Wert nur dann, wenn Werte größer als 2<sup>53</sup> vernünftigerweise zu erwarten sind.</li> <li>Konvertieren Sie nicht zwischen BigInt- und Number-Werten.</li> </ul></div></section><section aria-labelledby="bedingte_anweisung"><h3 id="bedingte_anweisung"><a href="#bedingte_anweisung">Bedingte Anweisung</a></h3><div class="section-content"><p>Ein BigInt-Wert folgt denselben Konvertierungsregeln wie Numbers, wenn:</p> <ul> <li>er in ein <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean"><code>Boolean</code></a> umgewandelt wird: über die <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean"><code>Boolean</code></a> Funktion;</li> <li>verwendet mit <a href="/de/docs/Web/JavaScript/Reference/Operators">logischen Operatoren</a> <code>||</code>, <code>&&</code> und <code>!</code>; oder</li> <li>innerhalb eines bedingten Tests wie einer <a href="/de/docs/Web/JavaScript/Reference/Statements/if...else"><code>if</code></a> Anweisung.</li> </ul> <p>Nämlich, nur <code>0n</code> ist <a href="/de/docs/Glossary/Falsy">falsch</a>; alles andere ist <a href="/de/docs/Glossary/Truthy">wahr</a>.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>if (0n) { console.log("Hello from the if!"); } else { console.log("Hello from the else!"); } // "Hello from the else!" 0n || 12n; // 12n 0n && 12n; // 0n Boolean(0n); // false Boolean(12n); // true !12n; // false !0n; // true </code></pre></div></div></section><section aria-labelledby="kryptographie"><h3 id="kryptographie"><a href="#kryptographie">Kryptographie</a></h3><div class="section-content"><p>Die auf BigInt-Werten unterstützten Operationen sind nicht konstant und daher anfällig für <a href="https://en.wikipedia.org/wiki/Timing_attack" class="external" target="_blank">Timing-Angriffe</a>. JavaScript BigInts könnten daher gefährlich für den Einsatz in der Kryptographie sein, ohne mindernde Faktoren. Als ein sehr generisches Beispiel könnte ein Angreifer den Zeitunterschied zwischen <code>101n ** 65537n</code> und <code>17n ** 9999n</code> messen und die Größe der Geheimnisse wie privater Schlüssel aus der verstrichenen Zeit ableiten. Wenn Sie dennoch BigInts verwenden müssen, sehen Sie sich die <a href="https://timing.attacks.cr.yp.to/programming.html" class="external" target="_blank">Timing-Angriff FAQ</a> für allgemeine Ratschläge zu diesem Thema an.</p></div></section><section aria-labelledby="verwendung_innerhalb_von_json"><h3 id="verwendung_innerhalb_von_json"><a href="#verwendung_innerhalb_von_json">Verwendung innerhalb von JSON</a></h3><div class="section-content"><p>Die Verwendung von <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify"><code>JSON.stringify()</code></a> mit einem BigInt-Wert wirft einen <code>TypeError</code>, da BigInt-Werte standardmäßig nicht in JSON serialisiert werden. <code>JSON.stringify()</code> lässt jedoch speziell eine Hintertür für BigInt-Werte offen: Es würde versuchen, die Methode <code>toJSON()</code> des BigInt aufzurufen. (Dies tut sie bei keinem anderen primitiven Wert.) Daher können Sie Ihre eigene <code>toJSON()</code>-Methode implementieren (dies ist einer der wenigen Fälle, in denen das Patchen eingebauter Objekte nicht explizit abgeraten wird):</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>BigInt.prototype.toJSON = function () { return { $bigint: this.toString() }; }; </code></pre></div> <p>Anstelle eines Fehlers erzeugt <code>JSON.stringify()</code> nun eine Zeichenkette wie diese:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>console.log(JSON.stringify({ a: 1n })); // {"a":{"$bigint":"1"}} </code></pre></div> <p>Wenn Sie <code>BigInt.prototype</code> nicht patchen möchten, können Sie den <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#the_replacer_parameter"><code>replacer</code></a> Parameter von <code>JSON.stringify</code> verwenden, um BigInt-Werte zu serialisieren:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>const replacer = (key, value) => typeof value === "bigint" ? { $bigint: value.toString() } : value; const data = { number: 1, big: 18014398509481982n, }; const stringified = JSON.stringify(data, replacer); console.log(stringified); // {"number":1,"big":{"$bigint":"18014398509481982"}} </code></pre></div> <p>Sie können dann den <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#using_the_reviver_parameter"><code>reviver</code></a> Parameter von <code>JSON.parse</code> verwenden, um sie zu verarbeiten:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>const reviver = (key, value) => value !== null && typeof value === "object" && "$bigint" in value && typeof value.$bigint === "string" ? BigInt(value.$bigint) : value; const payload = '{"number":1,"big":{"$bigint":"18014398509481982"}}'; const parsed = JSON.parse(payload, reviver); console.log(parsed); // { number: 1, big: 18014398509481982n } </code></pre></div> <div class="notecard note"> <p><strong>Hinweis:</strong> Während es möglich ist, den Replacer von <code>JSON.stringify()</code> generisch zu gestalten und BigInt-Werte für alle Objekte wie oben gezeigt richtig zu serialisieren, muss der Reviver von <code>JSON.parse()</code> mit Vorsicht verwendet werden, da die Serialisierung <em>unumkehrbar</em> ist: Es ist nicht möglich, zwischen einem Objekt, das zufällig eine Eigenschaft namens <code>$bigint</code> hat, und einem tatsächlichen BigInt zu unterscheiden.</p> <p>Darüber hinaus erstellt das obige Beispiel ein gesamtes Objekt während des Ersetzens und Wiederherstellens, was Leistungs- oder Speicherimplikationen für größere Objekte mit vielen BigInts haben kann. Wenn Sie die Form der Nutzlast kennen, kann es besser sein, sie einfach als Zeichenketten zu serialisieren und sie basierend auf dem Namen des Eigenschaftsschlüssels wiederherzustellen.</p> </div> <p>Tatsächlich erlaubt JSON Zahlenliterale, die beliebig lang sind; sie können nur in JavaScript nicht mit voller Präzision geparst werden. Wenn Sie mit einem anderen Programm in einer Sprache kommunizieren, die längere Ganzzahlen unterstützt (wie 64-Bit-Ganzzahlen), und Sie das BigInt als JSON-Zahl statt als JSON-Zeichenkette übertragen möchten, siehe <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/JSON#using_json_numbers">Verlustfreie Zahlenserialisierung</a>.</p></div></section><section aria-labelledby="bigint-umwandlung"><h3 id="bigint-umwandlung"><a href="#bigint-umwandlung">BigInt-Umwandlung</a></h3><div class="section-content"><p>Viele eingebaute Operationen, die BigInts erwarten, wandeln ihre Argumente zuerst in BigInts um. <a href="https://tc39.es/ecma262/multipage/abstract-operations.html#sec-tobigint" class="external" target="_blank">Die Operation</a> lässt sich wie folgt zusammenfassen:</p> <ul> <li>BigInts werden unverändert zurückgegeben.</li> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/undefined"><code>undefined</code></a> und <a href="/de/docs/Web/JavaScript/Reference/Operators/null"><code>null</code></a> werfen einen <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError"><code>TypeError</code></a>.</li> <li><code>true</code> wird in <code>1n</code> umgewandelt; <code>false</code> wird in <code>0n</code> umgewandelt.</li> <li>Strings werden durch Parsen als ob sie ein Ganzzahlliteral enthalten, konvertiert. Jeder Parsefehler führt zu einem <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError"><code>SyntaxError</code></a>. Die Syntax ist ein Subset von <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number#number_coercion">string numeric literals</a>, bei dem Dezimalpunkte oder Exponent-Indikatoren nicht erlaubt sind.</li> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number">Numbers</a> werfen einen <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError"><code>TypeError</code></a>, um ungewollte implizite Konvertierungen zu verhindern, die zu Präzisionsverlust führen.</li> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol">Symbols</a> werfen einen <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError"><code>TypeError</code></a>.</li> <li>Objekte werden zuerst <a href="/de/docs/Web/JavaScript/Data_structures#primitive_coercion">in einen Primitive umgewandelt</a>, indem ihre <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toPrimitive"><code>[Symbol.toPrimitive]()</code></a> (mit <code>"number"</code> als Hinweis), <code>valueOf()</code>, und <code>toString()</code> Methoden in dieser Reihenfolge aufgerufen werden. Der resultierende Primitive wird dann in ein BigInt umgewandelt.</li> </ul> <p>Der beste Weg, um nahezu denselben Effekt in JavaScript zu erzielen, ist die Verwendung der <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt"><code>BigInt()</code></a> Funktion: <code>BigInt(x)</code> verwendet denselben Algorithmus zur Konvertierung von <code>x</code>, außer dass <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number">Numbers</a> keinen <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError"><code>TypeError</code></a> werfen, sondern in BigInts umgewandelt werden, wenn sie Ganzzahlen sind.</p> <p>Beachten Sie, dass eingebaute Operationen, die BigInts erwarten, das BigInt oft auf eine feste Breite nach der Umwandlung kürzen. Dies umfasst <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN"><code>BigInt.asIntN()</code></a>, <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN"><code>BigInt.asUintN()</code></a>, und Methoden von <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array"><code>BigInt64Array</code></a> und <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigUint64Array"><code>BigUint64Array</code></a>.</p></div></section><section aria-labelledby="konstruktor"><h2 id="konstruktor"><a href="#konstruktor">Konstruktor</a></h2><div class="section-content"><dl> <dt id="bigint"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt"><code>BigInt()</code></a></dt> <dd> <p>Gibt primitive Werte vom Typ BigInt zurück. Wirft einen Fehler, wenn sie mit <code>new</code> aufgerufen wird.</p> </dd> </dl></div></section><section aria-labelledby="statische_methoden"><h2 id="statische_methoden"><a href="#statische_methoden">Statische Methoden</a></h2><div class="section-content"><dl> <dt id="bigint.asintn"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN"><code>BigInt.asIntN()</code></a></dt> <dd> <p>Begrenzt einen BigInt-Wert auf einen vorzeichenbehafteten Ganzzahlwert und gibt diesen Wert zurück.</p> </dd> <dt id="bigint.asuintn"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN"><code>BigInt.asUintN()</code></a></dt> <dd> <p>Begrenzt einen BigInt-Wert auf einen vorzeichenlosen Ganzzahlwert und gibt diesen Wert zurück.</p> </dd> </dl></div></section><section aria-labelledby="instanzvariablen"><h2 id="instanzvariablen"><a href="#instanzvariablen">Instanzvariablen</a></h2><div class="section-content"><p>Diese Eigenschaften sind auf <code>BigInt.prototype</code> definiert und werden von allen <code>BigInt</code>-Instanzen geteilt.</p> <dl> <dt id="bigint.prototype.constructor"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor"><code>BigInt.prototype.constructor</code></a></dt> <dd> <p>Die Konstruktorfunktion, die das Instanzobjekt erstellt hat. Für <code>BigInt</code>-Instanzen ist der anfängliche Wert der <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt"><code>BigInt</code></a> Konstruktor.</p> </dd> <dt id="bigint.prototypesymbol.tostringtag"><a href="#bigint.prototypesymbol.tostringtag"><code>BigInt.prototype[Symbol.toStringTag]</code></a></dt> <dd> <p>Der ursprüngliche Wert der <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toStringTag"><code>[Symbol.toStringTag]</code></a> Eigenschaft ist die Zeichenkette <code>"BigInt"</code>. Diese Eigenschaft wird in <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString"><code>Object.prototype.toString()</code></a> verwendet. Da <code>BigInt</code> jedoch auch seine eigene <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString"><code>toString()</code></a> Methode hat, wird diese Eigenschaft nicht verwendet, es sei denn, Sie rufen <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Function/call"><code>Object.prototype.toString.call()</code></a> mit einem BigInt als <code>thisArg</code> auf.</p> </dd> </dl></div></section><section aria-labelledby="instanzmethoden"><h2 id="instanzmethoden"><a href="#instanzmethoden">Instanzmethoden</a></h2><div class="section-content"><dl> <dt id="bigint.prototype.tolocalestring"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toLocaleString"><code>BigInt.prototype.toLocaleString()</code></a></dt> <dd> <p>Gibt eine zeichenkettenbasierte, sprachensensitive Darstellung dieses BigInt-Werts zurück. Überschreibt die <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString"><code>Object.prototype.toLocaleString()</code></a> Methode.</p> </dd> <dt id="bigint.prototype.tostring"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString"><code>BigInt.prototype.toString()</code></a></dt> <dd> <p>Gibt eine Zeichenkette zurück, die diesen BigInt-Wert in der angegebenen Basis (Radix) darstellt. Überschreibt die <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString"><code>Object.prototype.toString()</code></a> Methode.</p> </dd> <dt id="bigint.prototype.valueof"><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/valueOf"><code>BigInt.prototype.valueOf()</code></a></dt> <dd> <p>Gibt diesen BigInt-Wert zurück. Überschreibt die <a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf"><code>Object.prototype.valueOf()</code></a> Methode.</p> </dd> </dl></div></section><section aria-labelledby="beispiele"><h2 id="beispiele"><a href="#beispiele">Beispiele</a></h2><div class="section-content"></div></section><section aria-labelledby="primzahlen_berechnen"><h3 id="primzahlen_berechnen"><a href="#primzahlen_berechnen">Primzahlen berechnen</a></h3><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>// Returns true if the passed BigInt value is a prime number function isPrime(p) { for (let i = 2n; i * i <= p; i++) { if (p % i === 0n) return false; } return true; } // Takes a BigInt value as an argument, returns nth prime number as a BigInt value function nthPrime(nth) { let maybePrime = 2n; let prime = 0n; while (nth >= 0n) { if (isPrime(maybePrime)) { nth--; prime = maybePrime; } maybePrime++; } return prime; } nthPrime(20n); // 73n </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/numbers-and-dates.html#sec-bigint-objects">ECMAScript Language Specification <br/><small># sec-bigint-objects</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/Number"><code>Number</code></a></li> <li><a href="/de/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER"><code>Number.MAX_SAFE_INTEGER</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 7.359-18.908 12.709-30.034 15.637l-6.17-21.698c7.666-2.017 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Content available under <a href="/de/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"url":"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt","doc":{"isMarkdown":true,"isTranslated":true,"isActive":true,"flaws":{},"title":"BigInt","mdn_url":"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt","locale":"de","native":"Deutsch","browserCompat":["javascript.builtins.BigInt"],"baseline":{"baseline":"high","baseline_high_date":"2023-03-16","baseline_low_date":"2020-09-16","support":{"chrome":"67","chrome_android":"67","edge":"79","firefox":"68","firefox_android":"68","safari":"14","safari_ios":"14"}},"sidebarHTML":"<ol><li class=\"section\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects\">Globale Objekte</a></li><li class=\"section\"><em><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt\" aria-current=\"page\"><code>BigInt</code></a></em></li><li><details open=\"\"><summary>Konstruktor</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt\"><code>BigInt() Konstruktor</code></a></li></ol></details></li><li><details open=\"\"><summary>Statische Methoden</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN\"><code>BigInt.asIntN()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN\"><code>BigInt.asUintN()</code></a></li></ol></details></li><li><details open=\"\"><summary>Instanzmethoden</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toLocaleString\"><code>BigInt.prototype.toLocaleString()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString\"><code>BigInt.prototype.toString()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/valueOf\"><code>BigInt.prototype.valueOf()</code></a></li></ol></details></li><li class=\"section no-link\">Vererbung</li><li class=\"section\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object\"><code>Object/Function</code></a></li><li><details><summary>Statische Methoden</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/apply\"><code>Function.prototype.apply()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/bind\"><code>Function.prototype.bind()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/call\"><code>Function.prototype.call()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/Symbol.hasInstance\"><code>Function.prototype[Symbol.hasInstance]()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/toString\"><code>Function.prototype.toString()</code></a></li></ol></details></li><li><details><summary>Statische Eigenschaften</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/arguments\"><code>Function.prototype.arguments</code></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><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/Function/caller\"><code>Function.prototype.caller</code></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><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/Function/displayName\"><code>Function: displayName</code></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/Function/length\"><code>Function: length</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/name\"><code>Function: name</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/prototype\"><code>Function: prototype</code></a></li></ol></details></li><li><details><summary>Instanzmethoden</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/__defineGetter__\"><code>Object.prototype.__defineGetter__()</code></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/Object/__defineSetter__\"><code>Object.prototype.__defineSetter__()</code></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/Object/__lookupGetter__\"><code>Object.prototype.__lookupGetter__()</code></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/Object/__lookupSetter__\"><code>Object.prototype.__lookupSetter__()</code></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/Object/hasOwnProperty\"><code>Object.prototype.hasOwnProperty()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/isPrototypeOf\"><code>Object.prototype.isPrototypeOf()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/propertyIsEnumerable\"><code>Object.prototype.propertyIsEnumerable()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString\"><code>Object.prototype.toLocaleString()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString\"><code>Object.prototype.toString()</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf\"><code>Object.prototype.valueOf()</code></a></li></ol></details></li><li><details><summary>Instanzeigenschaften</summary><ol><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor\"><code>Object.prototype.constructor</code></a></li><li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/proto\"><code>Object.prototype.__proto__</code></a><abbr class=\"icon icon-deprecated\" title=\"Veraltet. Nicht für neue Websites verwenden.\">\n <span class=\"visually-hidden\">Veraltet</span>\n</abbr></li></ol></details></li></ol>","sidebarMacro":"JSRef","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p><strong><code>BigInt</code></strong> Werte repräsentieren numerische Werte, die <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER\">zu groß</a> sind, um durch den <code>number</code> <a href=\"/de/docs/Glossary/Primitive\">Primitive</a> dargestellt zu werden.</p>"}},{"type":"prose","value":{"id":"beschreibung","title":"Beschreibung","isH3":false,"content":"<p>Ein <strong>BigInt-Wert</strong>, manchmal einfach nur <strong>BigInt</strong> genannt, ist ein <code>bigint</code> <a href=\"/de/docs/Glossary/Primitive\">Primitive</a>, das durch Anhängen von <code>n</code> an das Ende eines Ganzzahlliterals oder durch Aufrufen der <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt\"><code>BigInt()</code></a> Funktion (ohne den <code>new</code> Operator) mit einem Ganzzahl- oder Zeichenkettenwert erstellt wird.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>const previouslyMaxSafeInteger = 9007199254740991n;\n\nconst alsoHuge = BigInt(9007199254740991);\n// 9007199254740991n\n\nconst hugeString = BigInt(\"9007199254740991\");\n// 9007199254740991n\n\nconst hugeHex = BigInt(\"0x1fffffffffffff\");\n// 9007199254740991n\n\nconst hugeOctal = BigInt(\"0o377777777777777777\");\n// 9007199254740991n\n\nconst hugeBin = BigInt(\n \"0b11111111111111111111111111111111111111111111111111111\",\n);\n// 9007199254740991n\n</code></pre></div>\n<p>BigInt-Werte sind in mancher Hinsicht ähnlich wie Number-Werte, unterscheiden sich jedoch in einigen wesentlichen Punkten: Ein BigInt-Wert kann nicht mit Methoden des eingebauten <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Math\"><code>Math</code></a> Objekts verwendet werden und kann nicht mit einem Number-Wert in Operationen gemischt werden; sie müssen in denselben Typ umgewandelt werden. Seien Sie vorsichtig beim Konvertieren der Werte hin und her, da die Präzision eines BigInt-Werts möglicherweise verloren geht, wenn er in einen Number-Wert umgewandelt wird.</p>"}},{"type":"prose","value":{"id":"typinformationen","title":"Typinformationen","isH3":true,"content":"<p>Bei einem Test gegen <code>typeof</code> ergibt ein BigInt-Wert (<code>bigint</code> Primitive) <code>\"bigint\"</code>:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>typeof 1n === \"bigint\"; // true\ntypeof BigInt(\"1\") === \"bigint\"; // true\n</code></pre></div>\n<p>Ein BigInt-Wert kann auch in einem <code>Object</code> verpackt werden:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>typeof Object(1n) === \"object\"; // true\n</code></pre></div>"}},{"type":"prose","value":{"id":"operatoren","title":"Operatoren","isH3":true,"content":"<p>Die meisten Operatoren unterstützen BigInts, die meisten erlauben jedoch keine Operanden gemischten Typs — beide Operanden müssen entweder BigInt sein oder keines:</p>\n<ul>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators#arithmetic_operators\">Arithmetische Operatoren</a>: <code>+</code>, <code>-</code>, <code>*</code>, <code>/</code>, <code>%</code>, <code>**</code></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators#bitwise_shift_operators\">Bitweise Operatoren</a>: <code>>></code>, <code><<</code>, <code>&</code>, <code>|</code>, <code>^</code>, <code>~</code></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unary_negation\">Unäres Minus (<code>-</code>)</a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators#increment_and_decrement\">Inkrement/Dekrement</a>: <code>++</code>, <code>--</code></li>\n</ul>\n<p>Die booleschen Operatoren erlauben das Mischen von Numbers und BigInts als Operanden:</p>\n<ul>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators#relational_operators\">Vergleichsoperatoren</a> und <a href=\"/de/docs/Web/JavaScript/Reference/Operators#equality_operators\">Gleichheitsoperatoren</a>: <code>></code>, <code><</code>, <code>>=</code>, <code><=</code>, <code>==</code>, <code>!=</code>, <code>===</code>, <code>!==</code></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators#binary_logical_operators\">Logische Operatoren</a> beruhen nur auf der <a href=\"/de/docs/Glossary/Truthy\">Wahrhaftigkeit</a> der Operanden</li>\n</ul>\n<p>Einige Operatoren unterstützen BigInt überhaupt nicht:</p>\n<ul>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unary_plus\">Unäres Plus (<code>+</code>)</a> kann aufgrund der Konfliktnutzung in asm.js nicht unterstützt werden, sodass es <a href=\"https://github.com/tc39/proposal-bigint/blob/master/ADVANCED.md#dont-break-asmjs\" class=\"external\" target=\"_blank\">um asm.js nicht zu brechen</a> weggelassen wurde.</li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Operators/Unsigned_right_shift\">Unsigned right shift (<code>>>></code>)</a> ist der einzige bitweise Operator, der nicht unterstützt wird, da jeder BigInt-Wert signiert ist.</li>\n</ul>\n<p>Spezialfälle:</p>\n<ul>\n <li>Addition (<code>+</code>) unter Beteiligung einer Zeichenkette und eines BigInt gibt eine Zeichenkette zurück.</li>\n <li>Division (<code>/</code>) kürzt Bruchanteile zu Null hin, da BigInt nicht in der Lage ist, Bruchmengen darzustellen.</li>\n</ul>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>const previousMaxSafe = BigInt(Number.MAX_SAFE_INTEGER); // 9007199254740991n\nconst maxPlusOne = previousMaxSafe + 1n; // 9007199254740992n\nconst theFuture = previousMaxSafe + 2n; // 9007199254740993n, this works now!\nconst prod = previousMaxSafe * 2n; // 18014398509481982n\nconst diff = prod - 10n; // 18014398509481972n\nconst mod = prod % 10n; // 2n\nconst bigN = 2n ** 54n; // 18014398509481984n\nbigN * -1n; // -18014398509481984n\nconst expected = 4n / 2n; // 2n\nconst truncated = 5n / 2n; // 2n, not 2.5n\n</code></pre></div>"}},{"type":"prose","value":{"id":"vergleiche","title":"Vergleiche","isH3":true,"content":"<p>Ein BigInt-Wert ist nicht streng gleich einem Number-Wert, aber er ist es <em>locker</em>:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>0n === 0; // false\n0n == 0; // true\n</code></pre></div>\n<p>Ein Number-Wert und ein BigInt-Wert können wie gewohnt verglichen werden:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>1n < 2; // true\n2n > 1; // true\n2 > 2; // false\n2n > 2; // false\n2n >= 2; // true\n</code></pre></div>\n<p>BigInt-Werte und Number-Werte können in Arrays gemischt und sortiert werden:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>const mixed = [4n, 6, -12n, 10, 4, 0, 0n];\n// [4n, 6, -12n, 10, 4, 0, 0n]\n\nmixed.sort(); // default sorting behavior\n// [ -12n, 0, 0n, 10, 4n, 4, 6 ]\n\nmixed.sort((a, b) => a - b);\n// won't work since subtraction will not work with mixed types\n// TypeError: can't convert BigInt value to Number value\n\n// sort with an appropriate numeric comparator\nmixed.sort((a, b) => (a < b ? -1 : a > b ? 1 : 0));\n// [ -12n, 0, 0n, 4n, 4, 6, 10 ]\n</code></pre></div>\n<p>Beachten Sie, dass Vergleiche mit <code>Object</code>-verpackten BigInt-Werten wie bei anderen Objekten nur Gleichheit anzeigen, wenn dieselbe Objektinstanz verglichen wird:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>Object(0n) === 0n; // false\nObject(0n) === Object(0n); // false\n\nconst o = Object(0n);\no === o; // true\n</code></pre></div>\n<p>Da das Konvertieren zwischen Number-Werten und BigInt-Werten zu einem Verlust der Präzision führen kann, wird Folgendes empfohlen:</p>\n<ul>\n <li>Verwenden Sie einen BigInt-Wert nur dann, wenn Werte größer als 2<sup>53</sup> vernünftigerweise zu erwarten sind.</li>\n <li>Konvertieren Sie nicht zwischen BigInt- und Number-Werten.</li>\n</ul>"}},{"type":"prose","value":{"id":"bedingte_anweisung","title":"Bedingte Anweisung","isH3":true,"content":"<p>Ein BigInt-Wert folgt denselben Konvertierungsregeln wie Numbers, wenn:</p>\n<ul>\n <li>er in ein <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean\"><code>Boolean</code></a> umgewandelt wird: über die <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Boolean\"><code>Boolean</code></a> Funktion;</li>\n <li>verwendet mit <a href=\"/de/docs/Web/JavaScript/Reference/Operators\">logischen Operatoren</a> <code>||</code>, <code>&&</code> und <code>!</code>; oder</li>\n <li>innerhalb eines bedingten Tests wie einer <a href=\"/de/docs/Web/JavaScript/Reference/Statements/if...else\"><code>if</code></a> Anweisung.</li>\n</ul>\n<p>Nämlich, nur <code>0n</code> ist <a href=\"/de/docs/Glossary/Falsy\">falsch</a>; alles andere ist <a href=\"/de/docs/Glossary/Truthy\">wahr</a>.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>if (0n) {\n console.log(\"Hello from the if!\");\n} else {\n console.log(\"Hello from the else!\");\n}\n// \"Hello from the else!\"\n\n0n || 12n; // 12n\n0n && 12n; // 0n\nBoolean(0n); // false\nBoolean(12n); // true\n!12n; // false\n!0n; // true\n</code></pre></div>"}},{"type":"prose","value":{"id":"kryptographie","title":"Kryptographie","isH3":true,"content":"<p>Die auf BigInt-Werten unterstützten Operationen sind nicht konstant und daher anfällig für <a href=\"https://en.wikipedia.org/wiki/Timing_attack\" class=\"external\" target=\"_blank\">Timing-Angriffe</a>. JavaScript BigInts könnten daher gefährlich für den Einsatz in der Kryptographie sein, ohne mindernde Faktoren. Als ein sehr generisches Beispiel könnte ein Angreifer den Zeitunterschied zwischen <code>101n ** 65537n</code> und <code>17n ** 9999n</code> messen und die Größe der Geheimnisse wie privater Schlüssel aus der verstrichenen Zeit ableiten. Wenn Sie dennoch BigInts verwenden müssen, sehen Sie sich die <a href=\"https://timing.attacks.cr.yp.to/programming.html\" class=\"external\" target=\"_blank\">Timing-Angriff FAQ</a> für allgemeine Ratschläge zu diesem Thema an.</p>"}},{"type":"prose","value":{"id":"verwendung_innerhalb_von_json","title":"Verwendung innerhalb von JSON","isH3":true,"content":"<p>Die Verwendung von <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify\"><code>JSON.stringify()</code></a> mit einem BigInt-Wert wirft einen <code>TypeError</code>, da BigInt-Werte standardmäßig nicht in JSON serialisiert werden. <code>JSON.stringify()</code> lässt jedoch speziell eine Hintertür für BigInt-Werte offen: Es würde versuchen, die Methode <code>toJSON()</code> des BigInt aufzurufen. (Dies tut sie bei keinem anderen primitiven Wert.) Daher können Sie Ihre eigene <code>toJSON()</code>-Methode implementieren (dies ist einer der wenigen Fälle, in denen das Patchen eingebauter Objekte nicht explizit abgeraten wird):</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>BigInt.prototype.toJSON = function () {\n return { $bigint: this.toString() };\n};\n</code></pre></div>\n<p>Anstelle eines Fehlers erzeugt <code>JSON.stringify()</code> nun eine Zeichenkette wie diese:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>console.log(JSON.stringify({ a: 1n }));\n// {\"a\":{\"$bigint\":\"1\"}}\n</code></pre></div>\n<p>Wenn Sie <code>BigInt.prototype</code> nicht patchen möchten, können Sie den <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify#the_replacer_parameter\"><code>replacer</code></a> Parameter von <code>JSON.stringify</code> verwenden, um BigInt-Werte zu serialisieren:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>const replacer = (key, value) =>\n typeof value === \"bigint\" ? { $bigint: value.toString() } : value;\n\nconst data = {\n number: 1,\n big: 18014398509481982n,\n};\nconst stringified = JSON.stringify(data, replacer);\n\nconsole.log(stringified);\n// {\"number\":1,\"big\":{\"$bigint\":\"18014398509481982\"}}\n</code></pre></div>\n<p>Sie können dann den <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#using_the_reviver_parameter\"><code>reviver</code></a> Parameter von <code>JSON.parse</code> verwenden, um sie zu verarbeiten:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>const reviver = (key, value) =>\n value !== null &&\n typeof value === \"object\" &&\n \"$bigint\" in value &&\n typeof value.$bigint === \"string\"\n ? BigInt(value.$bigint)\n : value;\n\nconst payload = '{\"number\":1,\"big\":{\"$bigint\":\"18014398509481982\"}}';\nconst parsed = JSON.parse(payload, reviver);\n\nconsole.log(parsed);\n// { number: 1, big: 18014398509481982n }\n</code></pre></div>\n<div class=\"notecard note\">\n <p><strong>Hinweis:</strong> Während es möglich ist, den Replacer von <code>JSON.stringify()</code> generisch zu gestalten und BigInt-Werte für alle Objekte wie oben gezeigt richtig zu serialisieren, muss der Reviver von <code>JSON.parse()</code> mit Vorsicht verwendet werden, da die Serialisierung <em>unumkehrbar</em> ist: Es ist nicht möglich, zwischen einem Objekt, das zufällig eine Eigenschaft namens <code>$bigint</code> hat, und einem tatsächlichen BigInt zu unterscheiden.</p>\n <p>Darüber hinaus erstellt das obige Beispiel ein gesamtes Objekt während des Ersetzens und Wiederherstellens, was Leistungs- oder Speicherimplikationen für größere Objekte mit vielen BigInts haben kann. Wenn Sie die Form der Nutzlast kennen, kann es besser sein, sie einfach als Zeichenketten zu serialisieren und sie basierend auf dem Namen des Eigenschaftsschlüssels wiederherzustellen.</p>\n</div>\n<p>Tatsächlich erlaubt JSON Zahlenliterale, die beliebig lang sind; sie können nur in JavaScript nicht mit voller Präzision geparst werden. Wenn Sie mit einem anderen Programm in einer Sprache kommunizieren, die längere Ganzzahlen unterstützt (wie 64-Bit-Ganzzahlen), und Sie das BigInt als JSON-Zahl statt als JSON-Zeichenkette übertragen möchten, siehe <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/JSON#using_json_numbers\">Verlustfreie Zahlenserialisierung</a>.</p>"}},{"type":"prose","value":{"id":"bigint-umwandlung","title":"BigInt-Umwandlung","isH3":true,"content":"<p>Viele eingebaute Operationen, die BigInts erwarten, wandeln ihre Argumente zuerst in BigInts um. <a href=\"https://tc39.es/ecma262/multipage/abstract-operations.html#sec-tobigint\" class=\"external\" target=\"_blank\">Die Operation</a> lässt sich wie folgt zusammenfassen:</p>\n<ul>\n <li>BigInts werden unverändert zurückgegeben.</li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/undefined\"><code>undefined</code></a> und <a href=\"/de/docs/Web/JavaScript/Reference/Operators/null\"><code>null</code></a> werfen einen <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError\"><code>TypeError</code></a>.</li>\n <li><code>true</code> wird in <code>1n</code> umgewandelt; <code>false</code> wird in <code>0n</code> umgewandelt.</li>\n <li>Strings werden durch Parsen als ob sie ein Ganzzahlliteral enthalten, konvertiert. Jeder Parsefehler führt zu einem <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/SyntaxError\"><code>SyntaxError</code></a>. Die Syntax ist ein Subset von <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number#number_coercion\">string numeric literals</a>, bei dem Dezimalpunkte oder Exponent-Indikatoren nicht erlaubt sind.</li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number\">Numbers</a> werfen einen <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError\"><code>TypeError</code></a>, um ungewollte implizite Konvertierungen zu verhindern, die zu Präzisionsverlust führen.</li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol\">Symbols</a> werfen einen <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError\"><code>TypeError</code></a>.</li>\n <li>Objekte werden zuerst <a href=\"/de/docs/Web/JavaScript/Data_structures#primitive_coercion\">in einen Primitive umgewandelt</a>, indem ihre <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toPrimitive\"><code>[Symbol.toPrimitive]()</code></a> (mit <code>\"number\"</code> als Hinweis), <code>valueOf()</code>, und <code>toString()</code> Methoden in dieser Reihenfolge aufgerufen werden. Der resultierende Primitive wird dann in ein BigInt umgewandelt.</li>\n</ul>\n<p>Der beste Weg, um nahezu denselben Effekt in JavaScript zu erzielen, ist die Verwendung der <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt\"><code>BigInt()</code></a> Funktion: <code>BigInt(x)</code> verwendet denselben Algorithmus zur Konvertierung von <code>x</code>, außer dass <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number\">Numbers</a> keinen <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/TypeError\"><code>TypeError</code></a> werfen, sondern in BigInts umgewandelt werden, wenn sie Ganzzahlen sind.</p>\n<p>Beachten Sie, dass eingebaute Operationen, die BigInts erwarten, das BigInt oft auf eine feste Breite nach der Umwandlung kürzen. Dies umfasst <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN\"><code>BigInt.asIntN()</code></a>, <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN\"><code>BigInt.asUintN()</code></a>, und Methoden von <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt64Array\"><code>BigInt64Array</code></a> und <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigUint64Array\"><code>BigUint64Array</code></a>.</p>"}},{"type":"prose","value":{"id":"konstruktor","title":"Konstruktor","isH3":false,"content":"<dl>\n <dt id=\"bigint\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt\"><code>BigInt()</code></a></dt>\n <dd>\n <p>Gibt primitive Werte vom Typ BigInt zurück. Wirft einen Fehler, wenn sie mit <code>new</code> aufgerufen wird.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"statische_methoden","title":"Statische Methoden","isH3":false,"content":"<dl>\n <dt id=\"bigint.asintn\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asIntN\"><code>BigInt.asIntN()</code></a></dt>\n <dd>\n <p>Begrenzt einen BigInt-Wert auf einen vorzeichenbehafteten Ganzzahlwert und gibt diesen Wert zurück.</p>\n </dd>\n <dt id=\"bigint.asuintn\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/asUintN\"><code>BigInt.asUintN()</code></a></dt>\n <dd>\n <p>Begrenzt einen BigInt-Wert auf einen vorzeichenlosen Ganzzahlwert und gibt diesen Wert zurück.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"instanzvariablen","title":"Instanzvariablen","isH3":false,"content":"<p>Diese Eigenschaften sind auf <code>BigInt.prototype</code> definiert und werden von allen <code>BigInt</code>-Instanzen geteilt.</p>\n<dl>\n <dt id=\"bigint.prototype.constructor\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor\"><code>BigInt.prototype.constructor</code></a></dt>\n <dd>\n <p>Die Konstruktorfunktion, die das Instanzobjekt erstellt hat. Für <code>BigInt</code>-Instanzen ist der anfängliche Wert der <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/BigInt\"><code>BigInt</code></a> Konstruktor.</p>\n </dd>\n <dt id=\"bigint.prototypesymbol.tostringtag\"><a href=\"#bigint.prototypesymbol.tostringtag\"><code>BigInt.prototype[Symbol.toStringTag]</code></a></dt>\n <dd>\n <p>Der ursprüngliche Wert der <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Symbol/toStringTag\"><code>[Symbol.toStringTag]</code></a> Eigenschaft ist die Zeichenkette <code>\"BigInt\"</code>. Diese Eigenschaft wird in <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString\"><code>Object.prototype.toString()</code></a> verwendet. Da <code>BigInt</code> jedoch auch seine eigene <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString\"><code>toString()</code></a> Methode hat, wird diese Eigenschaft nicht verwendet, es sei denn, Sie rufen <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Function/call\"><code>Object.prototype.toString.call()</code></a> mit einem BigInt als <code>thisArg</code> auf.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"instanzmethoden","title":"Instanzmethoden","isH3":false,"content":"<dl>\n <dt id=\"bigint.prototype.tolocalestring\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toLocaleString\"><code>BigInt.prototype.toLocaleString()</code></a></dt>\n <dd>\n <p>Gibt eine zeichenkettenbasierte, sprachensensitive Darstellung dieses BigInt-Werts zurück. Überschreibt die <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toLocaleString\"><code>Object.prototype.toLocaleString()</code></a> Methode.</p>\n </dd>\n <dt id=\"bigint.prototype.tostring\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/toString\"><code>BigInt.prototype.toString()</code></a></dt>\n <dd>\n <p>Gibt eine Zeichenkette zurück, die diesen BigInt-Wert in der angegebenen Basis (Radix) darstellt. Überschreibt die <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/toString\"><code>Object.prototype.toString()</code></a> Methode.</p>\n </dd>\n <dt id=\"bigint.prototype.valueof\"><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt/valueOf\"><code>BigInt.prototype.valueOf()</code></a></dt>\n <dd>\n <p>Gibt diesen BigInt-Wert zurück. Überschreibt die <a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf\"><code>Object.prototype.valueOf()</code></a> Methode.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"beispiele","title":"Beispiele","isH3":false,"content":""}},{"type":"prose","value":{"id":"primzahlen_berechnen","title":"Primzahlen berechnen","isH3":true,"content":"<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>// Returns true if the passed BigInt value is a prime number\nfunction isPrime(p) {\n for (let i = 2n; i * i <= p; i++) {\n if (p % i === 0n) return false;\n }\n return true;\n}\n\n// Takes a BigInt value as an argument, returns nth prime number as a BigInt value\nfunction nthPrime(nth) {\n let maybePrime = 2n;\n let prime = 0n;\n\n while (nth >= 0n) {\n if (isPrime(maybePrime)) {\n nth--;\n prime = maybePrime;\n }\n maybePrime++;\n }\n\n return prime;\n}\n\nnthPrime(20n);\n// 73n\n</code></pre></div>"}},{"type":"specifications","value":{"title":"Spezifikationen","id":"spezifikationen","isH3":false,"specifications":[{"bcdSpecificationURL":"https://tc39.es/ecma262/multipage/numbers-and-dates.html#sec-bigint-objects","title":"ECMAScript Language Specification"}],"query":"javascript.builtins.BigInt"}},{"type":"browser_compatibility","value":{"title":"Browser-Kompatibilität","id":"browser-kompatibilität","isH3":false,"query":"javascript.builtins.BigInt"}},{"type":"prose","value":{"id":"siehe_auch","title":"Siehe auch","isH3":false,"content":"<ul>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number\"><code>Number</code></a></li>\n <li><a href=\"/de/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER\"><code>Number.MAX_SAFE_INTEGER</code></a></li>\n</ul>"}}],"toc":[{"text":"Beschreibung","id":"beschreibung"},{"text":"Konstruktor","id":"konstruktor"},{"text":"Statische Methoden","id":"statische_methoden"},{"text":"Instanzvariablen","id":"instanzvariablen"},{"text":"Instanzmethoden","id":"instanzmethoden"},{"text":"Beispiele","id":"beispiele"},{"text":"Spezifikationen","id":"spezifikationen"},{"text":"Browser-Kompatibilität","id":"browser-kompatibilität"},{"text":"Siehe auch","id":"siehe_auch"}],"summary":"BigInt Werte repräsentieren numerische Werte, die zu groß sind, um durch den number Primitive dargestellt zu werden.","popularity":0,"modified":null,"other_translations":[{"locale":"en-US","title":"BigInt","native":"English (US)"},{"locale":"es","title":"BigInt","native":"Español"},{"locale":"fr","title":"BigInt","native":"Français"},{"locale":"ja","title":"BigInt","native":"日本語"},{"locale":"ko","title":"BigInt","native":"한국어"},{"locale":"pt-BR","title":"BigInt","native":"Português (do Brasil)"},{"locale":"ru","title":"BigInt","native":"Русский"},{"locale":"zh-CN","title":"BigInt","native":"中文 (简体)"},{"locale":"zh-TW","title":"BigInt","native":"正體中文 (繁體)"}],"pageType":"unknown","source":{"folder":"de/web/javascript/reference/global_objects/bigint","github_url":"https://github.com/mdn/translated-content/blob/main/files/de/web/javascript/reference/global_objects/bigint/index.md","last_commit_url":"https://github.com/mdn/translated-content/commit/null","filename":"index.md"},"short_title":"BigInt","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/Global_Objects","title":"Standard eingebaute Objekte"},{"uri":"/de/docs/Web/JavaScript/Reference/Global_Objects/BigInt","title":"BigInt"}],"pageTitle":"BigInt - JavaScript | MDN","noIndexing":false}}</script></body></html>