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<!doctype html><html lang="en-US" prefix="og: https://ogp.me/ns#"><head><meta charSet="utf-8"/><meta name="viewport" content="width=device-width,initial-scale=1"/><link rel="icon" href="https://developer.mozilla.org/favicon-48x48.bc390275e955dacb2e65.png"/><link rel="apple-touch-icon" href="https://developer.mozilla.org/apple-touch-icon.528534bba673c38049c2.png"/><meta name="theme-color" content="#ffffff"/><link rel="manifest" href="https://developer.mozilla.org/manifest.f42880861b394dd4dc9b.json"/><link rel="search" type="application/opensearchdescription+xml" href="/opensearch.xml" title="MDN Web Docs"/><title>Unicode - MDN Web Docs 用語集: ウェブ関連用語の定義 | MDN</title><link rel="alternate" title="Unicode" href="https://developer.mozilla.org/de/docs/Glossary/Unicode" hrefLang="de"/><link rel="alternate" title="Unicode" href="https://developer.mozilla.org/en-US/docs/Glossary/Unicode" hrefLang="en"/><link rel="alternate" title="Unicode" 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href="/ja/docs/Glossary/Accessibility_tree">Accessibility tree (アクセシビリティツリー)</a></li><li><a href="/ja/docs/Glossary/Accessible_description">Accessible description (アクセシブル説明)</a></li><li><a href="/ja/docs/Glossary/Accessible_name">Accessible name (アクセシブル名)</a></li><li><a href="/ja/docs/Glossary/Adobe_Flash">Adobe Flash</a></li><li><a href="/ja/docs/Glossary/Advance_measure">Advance measure (送り幅)</a></li><li><a href="/ja/docs/Glossary/AJAX">AJAX</a></li><li><a href="/ja/docs/Glossary/Algorithm">Algorithm (アルゴリズム)</a></li><li><a href="/ja/docs/Glossary/Alignment_Container">Alignment container (配置コンテナー)</a></li><li><a href="/ja/docs/Glossary/Alignment_Subject">Alignment subject (配置対象物)</a></li><li><a href="/ja/docs/Glossary/Alpha">Alpha (アルファチャンネル)</a></li><li><a href="/ja/docs/Glossary/ALPN">ALPN</a></li><li><a href="/ja/docs/Glossary/API">API</a></li><li><a href="/ja/docs/Glossary/Apple_Safari">Apple Safari</a></li><li><a href="/ja/docs/Glossary/Application_context">Application Context (アプリケーションコンテキスト)</a></li><li><a href="/ja/docs/Glossary/Argument">Argument (実引数)</a></li><li><a href="/ja/docs/Glossary/ARIA">ARIA</a></li><li><a href="/ja/docs/Glossary/ARPA">ARPA</a></li><li><a href="/ja/docs/Glossary/Arpanet">ARPANET</a></li><li><a href="/ja/docs/Glossary/Array">Array (配列)</a></li><li><a href="/ja/docs/Glossary/ASCII">ASCII</a></li><li><a href="/ja/docs/Glossary/Aspect_ratio">Aspect ratio (アスペクト比)</a></li><li><a href="/ja/docs/Glossary/Asynchronous">Asynchronous （非同期）</a></li><li><a href="/ja/docs/Glossary/ATAG">ATAG</a></li><li><a href="/ja/docs/Glossary/Attribute">Attribute (属性)</a></li><li><a href="/ja/docs/Glossary/Authentication">Authentication</a></li><li><a href="/ja/docs/Glossary/Authenticator">Authenticator</a></li><li><a href="/ja/docs/Glossary/Bandwidth">Bandwidth (帯域幅)</a></li><li><a href="/ja/docs/Glossary/Base64">Base64</a></li><li><a href="/ja/docs/Glossary/Baseline">Baseline</a></li><li><a href="/ja/docs/Glossary/Beacon">Beacon (ビーコン)</a></li><li><a href="/ja/docs/Glossary/Bezier_curve">Bézier curve (ベジェ曲線)</a></li><li><a href="/ja/docs/Glossary/bfcache">bfcache</a></li><li><a href="/ja/docs/Glossary/BiDi">BiDi (双方向)</a></li><li><a href="/ja/docs/Glossary/BigInt">BigInt</a></li><li><a href="/ja/docs/Glossary/Binding">Binding （バインド）</a></li><li><a href="/ja/docs/Glossary/Bitwise_flags">Bitwise flags (ビットフラグ)</a></li><li><a href="/ja/docs/Glossary/Blink">Blink</a></li><li><a href="/ja/docs/Glossary/blink_element"><blink>: 点滅要素</a></li><li><a href="/ja/docs/Glossary/Block">Block (ブロック)</a></li><li><a href="/ja/docs/Glossary/Block_cipher_mode_of_operation">Block cipher mode of operation (暗号利用モード)</a></li><li><a href="/ja/docs/Glossary/Block-level_content">Block-level content (ブロックレベルコンテンツ)</a></li><li><a href="/ja/docs/Glossary/Boolean">Boolean</a></li><li><a href="/ja/docs/Glossary/Bounding_box">Bounding Box (バウンディングボックス)</a></li><li><a href="/ja/docs/Glossary/Breadcrumb">Breadcrumb (パンくずリスト)</a></li><li><a href="/ja/docs/Glossary/Brotli_compression">Brotli</a></li><li><a href="/ja/docs/Glossary/Browser">Browser (ブラウザー)</a></li><li><a href="/ja/docs/Glossary/Browsing_context">Browsing context (閲覧コンテキスト)</a></li><li><a href="/ja/docs/Glossary/Buffer">buffer (バッファー)</a></li><li><a href="/ja/docs/Glossary/Cache">Cache(キャッシュ)</a></li><li><a href="/ja/docs/Glossary/Cacheable">Cacheable (キャッシュ可能)</a></li><li><a href="/ja/docs/Glossary/CalDAV">CalDAV</a></li><li><a href="/ja/docs/Glossary/Call_stack">Call stack (コールスタック)</a></li><li><a href="/ja/docs/Glossary/Callback_function">Callback function (コールバック関数)</a></li><li><a href="/ja/docs/Glossary/Camel_case">Camel case (キャメルケース)</a></li><li><a href="/ja/docs/Glossary/Canonical_order">Canonical order (正規順序)</a></li><li><a href="/ja/docs/Glossary/Canvas">Canvas</a></li><li><a href="/ja/docs/Glossary/Card_sorting">Card sorting (カードソート)</a></li><li><a href="/ja/docs/Glossary/CardDAV">CardDAV</a></li><li><a href="/ja/docs/Glossary/Caret">caret (キャレット)</a></li><li><a href="/ja/docs/Glossary/CDN">CDN</a></li><li><a href="/ja/docs/Glossary/Certificate_authority">Certificate authority (認証局)</a></li><li><a href="/ja/docs/Glossary/Certified">Certified</a></li><li><a href="/ja/docs/Glossary/Challenge">Challenge-response authentication (チャレンジレスポンス認証)</a></li><li><a href="/ja/docs/Glossary/Character">Character (文字)</a></li><li><a href="/ja/docs/Glossary/Character_encoding">Character encoding (文字エンコーディング)</a></li><li><a href="/ja/docs/Glossary/Character_reference">Character reference</a></li><li><a href="/ja/docs/Glossary/Character_set">Character set (文字コード)</a></li><li><a href="/ja/docs/Glossary/Chrome">Chrome (クローム)</a></li><li><a href="/ja/docs/Glossary/CIA">CIA（Confidentiality, Integrity, Availability）</a></li><li><a href="/ja/docs/Glossary/Cipher">Cipher (サイファー)</a></li><li><a href="/ja/docs/Glossary/Cipher_suite">Cipher suite (暗号スイート)</a></li><li><a href="/ja/docs/Glossary/Ciphertext">Ciphertext (暗号文)</a></li><li><a href="/ja/docs/Glossary/Class">Class (クラス)</a></li><li><a href="/ja/docs/Glossary/Clickjacking">Clickjacking</a></li><li><a href="/ja/docs/Glossary/Closure">Closure (クロージャ)</a></li><li><a href="/ja/docs/Glossary/Cloud">Cloud</a></li><li><a href="/ja/docs/Glossary/Cloud_computing">Cloud computing</a></li><li><a href="/ja/docs/Glossary/CMS">CMS</a></li><li><a href="/ja/docs/Glossary/Code_point">Code point (コードポイント)</a></li><li><a href="/ja/docs/Glossary/Code_splitting">Code splitting (コード分割)</a></li><li><a href="/ja/docs/Glossary/Code_unit">Code unit (コード単位)</a></li><li><a href="/ja/docs/Glossary/Codec">Codec (コーデック)</a></li><li><a href="/ja/docs/Glossary/Color_space">Color space (色空間)</a></li><li><a href="/ja/docs/Glossary/Color_wheel">Color wheel (色相環)</a></li><li><a href="/ja/docs/Glossary/Compile">Compile (コンパイル)</a></li><li><a href="/ja/docs/Glossary/Compile_time">Compile time (コンパイル時間)</a></li><li><a href="/ja/docs/Glossary/Composite_operation">Composite operation (合成演算)</a></li><li><a href="/ja/docs/Glossary/Computer_Programming">Computer Programming (コンピュータープログラミング)</a></li><li><a href="/ja/docs/Glossary/Conditional">Conditional (条件式)</a></li><li><a href="/ja/docs/Glossary/Constant">Constant (定数)</a></li><li><a href="/ja/docs/Glossary/Constructor">Constructor (コンストラクター)</a></li><li><a href="/ja/docs/Glossary/Content_header">Content header (コンテンツヘッダー)</a></li><li><a href="/ja/docs/Glossary/Continuous_Media">Continuous Media (連続的メディア)</a></li><li><a href="/ja/docs/Glossary/Control_flow">Control flow (制御フロー)</a></li><li><a href="/ja/docs/Glossary/Cookie">Cookie</a></li><li><a href="/ja/docs/Glossary/Copyleft">Copyleft (コピーレフト)</a></li><li><a href="/ja/docs/Glossary/CORS">CORS</a></li><li><a href="/ja/docs/Glossary/CORS-safelisted_request_header">CORS-safelisted request header (CORS セーフリストリクエストヘッダー)</a></li><li><a href="/ja/docs/Glossary/CORS-safelisted_response_header">CORS-safelisted response header (CORS セーフリストレスポンスヘッダー)</a></li><li><a href="/ja/docs/Glossary/Crawler">Crawler (クローラー)</a></li><li><a href="/ja/docs/Glossary/Credential">Credential</a></li><li><a href="/ja/docs/Glossary/CRLF">CRLF</a></li><li><a href="/ja/docs/Glossary/Cross_Axis">Cross Axis (交差軸)</a></li><li><a href="/ja/docs/Glossary/Cross-site_scripting">Cross-site scripting (クロスサイトスクリプティング)</a></li><li><a href="/ja/docs/Glossary/CRUD">CRUD</a></li><li><a href="/ja/docs/Glossary/Cryptanalysis">Cryptanalysis (暗号解読)</a></li><li><a href="/ja/docs/Glossary/Cryptographic_hash_function">Cryptographic hash function (暗号学的ハッシュ関数)</a></li><li><a href="/ja/docs/Glossary/Cryptography">Cryptography (暗号学)</a></li><li><a href="/ja/docs/Glossary/CSP">CSP</a></li><li><a href="/ja/docs/Glossary/CSRF">CSRF</a></li><li><a href="/ja/docs/Glossary/CSS">CSS</a></li><li><a href="/ja/docs/Glossary/CSSOM">CSS Object Model (CSSOM)</a></li><li><a href="/ja/docs/Glossary/CSS_pixel">CSS pixel</a></li><li><a href="/ja/docs/Glossary/CSS_preprocessor">CSS preprocessor (CSS プリプロセッサー)</a></li><li><a href="/ja/docs/Glossary/CLS">Cumulative Layout Shift (CLS)</a></li><li><a href="/ja/docs/Glossary/Data_structure">Data structure (データ構造)</a></li><li><a href="/ja/docs/Glossary/Database">Database</a></li><li><a href="/ja/docs/Glossary/Debounce">Debounce (デバウンス)</a></li><li><a href="/ja/docs/Glossary/Decryption">Decryption (復号)</a></li><li><a href="/ja/docs/Glossary/Deep_copy">Deep copy (ディープコピー)</a></li><li><a href="/ja/docs/Glossary/Delta">Delta (デルタ)</a></li><li><a href="/ja/docs/Glossary/Denial_of_Service">Denial of Service (サービス拒否)</a></li><li><a href="/ja/docs/Glossary/Deno">Deno</a></li><li><a href="/ja/docs/Glossary/CSS_Descriptor">Descriptor (CSS) (記述子)</a></li><li><a href="/ja/docs/Glossary/Deserialization">Deserialization (デシリアライズ)</a></li><li><a href="/ja/docs/Glossary/Developer_Tools">Developer Tools (開発者ツール)</a></li><li><a href="/ja/docs/Glossary/Digest">Digest</a></li><li><a href="/ja/docs/Glossary/Digital_certificate">Digital certificate (デジタル証明書)</a></li><li><a href="/ja/docs/Glossary/Digital_signature">Digital signature</a></li><li><a href="/ja/docs/Glossary/Distributed_Denial_of_Service">Distributed Denial of Service</a></li><li><a href="/ja/docs/Glossary/DMZ">DMZ</a></li><li><a href="/ja/docs/Glossary/DNS">DNS</a></li><li><a href="/ja/docs/Glossary/Doctype">Doctype</a></li><li><a href="/ja/docs/Glossary/Document_directive">Document directive (文書ディレクティブ)</a></li><li><a href="/ja/docs/Glossary/Document_environment">Document environment (文書環境)</a></li><li><a href="/ja/docs/Glossary/DOM">DOM (Document Object Model)</a></li><li><a href="/ja/docs/Glossary/Domain">Domain (ドメイン)</a></li><li><a href="/ja/docs/Glossary/Domain_name">Domain name (ドメイン名)</a></li><li><a href="/ja/docs/Glossary/Domain_sharding">Domain sharding (ドメインシャーディング)</a></li><li><a href="/ja/docs/Glossary/Dominator">Dominator (ドミネーター)</a></li><li><a href="/ja/docs/Glossary/DOS_attack">DoS attack (DoS 攻撃)</a></li><li><a href="/ja/docs/Glossary/DSL">DSL</a></li><li><a href="/ja/docs/Glossary/DTLS">DTLS (Datagram Transport Layer Security)</a></li><li><a href="/ja/docs/Glossary/DTMF">DTMF (Dual-Tone Multi-Frequency signaling)</a></li><li><a href="/ja/docs/Glossary/Dynamic_typing">Dynamic typing (動的型付け)</a></li><li><a href="/ja/docs/Glossary/ECMA">ECMA</a></li><li><a href="/ja/docs/Glossary/ECMAScript">ECMAScript</a></li><li><a href="/ja/docs/Glossary/Effective_connection_type">Effective connection type (有効接続種別)</a></li><li><a href="/ja/docs/Glossary/Element">Element (要素)</a></li><li><a href="/ja/docs/Glossary/Encapsulation">Encapsulation (カプセル化)</a></li><li><a href="/ja/docs/Glossary/Encryption">Encryption (暗号化)</a></li><li><a href="/ja/docs/Glossary/Endianness">Endianness (エンディアン)</a></li><li><a href="/ja/docs/Glossary/Engine">Engine</a></li><li><a href="/ja/docs/Glossary/Entity">Entity (エンティティ)</a></li><li><a href="/ja/docs/Glossary/Entity_header">Entity header (エンティティヘッダー)</a></li><li><a href="/ja/docs/Glossary/Enumerated">Enumerated (列挙型)</a></li><li><a href="/ja/docs/Glossary/eTLD">eTLD</a></li><li><a href="/ja/docs/Glossary/Event">Event (イベント)</a></li><li><a href="/ja/docs/Glossary/Exception">Exception (例外)</a></li><li><a href="/ja/docs/Glossary/EXIF">EXIF</a></li><li><a href="/ja/docs/Glossary/Expando">Expando</a></li><li><a href="/ja/docs/Glossary/Fallback_Alignment">Fallback alignment (代替配置)</a></li><li><a href="/ja/docs/Glossary/Falsy">Falsy (偽値)</a></li><li><a href="/ja/docs/Glossary/Favicon">Favicon (ファビコン)</a></li><li><a href="/ja/docs/Glossary/Federated_identity">Federated identity</a></li><li><a href="/ja/docs/Glossary/Fetch_directive">Fetch directive (フェッチディレクティブ)</a></li><li><a href="/ja/docs/Glossary/Fetch_metadata_request_header">Fetch metadata request header (フェッチメタデータリクエストヘッダー)</a></li><li><a href="/ja/docs/Glossary/Fingerprinting">Fingerprinting (フィンガープリンティング)</a></li><li><a href="/ja/docs/Glossary/Firefox_OS">Firefox OS</a></li><li><a href="/ja/docs/Glossary/Firewall">firewall (ファイアウォール)</a></li><li><a href="/ja/docs/Glossary/First_contentful_paint">First contentful paint</a></li><li><a href="/ja/docs/Glossary/First_CPU_idle">First CPU idle (最初の CPU アイドル)</a></li><li><a href="/ja/docs/Glossary/First_input_delay">First Input Delay (FID)</a><abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">非推奨</span> </abbr></li><li><a href="/ja/docs/Glossary/First_meaningful_paint">First Meaningful Paint</a></li><li><a href="/ja/docs/Glossary/First_paint">First paint</a></li><li><a href="/ja/docs/Glossary/First-class_Function">First-class Function (第一級関数)</a></li><li><a href="/ja/docs/Glossary/Flex">Flex</a></li><li><a href="/ja/docs/Glossary/Flex_Container">Flex Container (フレックスコンテナー)</a></li><li><a href="/ja/docs/Glossary/Flex_Item">Flex Item (フレックスアイテム)</a></li><li><a href="/ja/docs/Glossary/Flexbox">Flexbox (フレックスボックス)</a></li><li><a href="/ja/docs/Glossary/Flow_relative_values">Flow relative values (フロー関連値)</a></li><li><a href="/ja/docs/Glossary/Forbidden_header_name">Forbidden header name (禁止ヘッダー名)</a></li><li><a href="/ja/docs/Glossary/Forbidden_response_header_name">Forbidden response header name (禁止レスンポンスヘッダー名)</a></li><li><a href="/ja/docs/Glossary/Fork">Fork (フォーク)</a></li><li><a href="/ja/docs/Glossary/Fragmentainer">Fragmentainer</a></li><li><a href="/ja/docs/Glossary/FPS">frame rate (フレームレート, FPS)</a></li><li><a href="/ja/docs/Glossary/FTP">FTP</a></li><li><a href="/ja/docs/Glossary/FTU">FTU</a></li><li><a href="/ja/docs/Glossary/Function">Function (関数)</a></li><li><a href="/ja/docs/Glossary/Fuzzing">Fuzz testing (ファズテスティング)</a></li><li><a href="/ja/docs/Glossary/Gamut">Gamut (色域)</a></li><li><a href="/ja/docs/Glossary/Garbage_collection">Garbage collection (ガベージコレクション)</a></li><li><a href="/ja/docs/Glossary/Gecko">Gecko</a></li><li><a href="/ja/docs/Glossary/General_header">General header (一般ヘッダー)</a></li><li><a href="/ja/docs/Glossary/GIF">GIF</a></li><li><a href="/ja/docs/Glossary/Git">Git</a></li><li><a href="/ja/docs/Glossary/Global_object">Global object (グローバルオブジェクト)</a></li><li><a href="/ja/docs/Glossary/Global_scope">Global scope (グローバルスコープ)</a></li><li><a href="/ja/docs/Glossary/Global_variable">Global variable (グローバル変数)</a></li><li><a href="/ja/docs/Glossary/Glyph">Glyph (字体)</a></li><li><a href="/ja/docs/Glossary/Google_Chrome">Google Chrome</a></li><li><a href="/ja/docs/Glossary/GPL">GPL</a></li><li><a href="/ja/docs/Glossary/GPU">GPU</a></li><li><a href="/ja/docs/Glossary/Graceful_degradation">Graceful degradation (グレースフルデグラデーション)</a></li><li><a href="/ja/docs/Glossary/Grid">Grid (グリッド)</a></li><li><a href="/ja/docs/Glossary/Grid_Areas">Grid Areas (グリッド領域)</a></li><li><a href="/ja/docs/Glossary/Grid_Axis">Grid Axis (グリッド軸)</a></li><li><a href="/ja/docs/Glossary/Grid_Cell">Grid Cell (グリッドセル)</a></li><li><a href="/ja/docs/Glossary/Grid_Column">Grid Column (グリッド列)</a></li><li><a href="/ja/docs/Glossary/Grid_Container">Grid container</a></li><li><a href="/ja/docs/Glossary/Grid_Lines">Grid Line (グリッド線)</a></li><li><a href="/ja/docs/Glossary/Grid_Row">Grid Row (グリッド行)</a></li><li><a href="/ja/docs/Glossary/Grid_Tracks">Grid Track (グリッドトラック)</a></li><li><a href="/ja/docs/Glossary/Gutters">Gutter (溝)</a></li><li><a href="/ja/docs/Glossary/gzip_compression">gzip compression (gzip 圧縮)</a></li><li><a href="/ja/docs/Glossary/Hash">Hash (ハッシュ)</a></li><li><a href="/ja/docs/Glossary/Head">Head</a></li><li><a href="/ja/docs/Glossary/High-level_programming_language">High-level programming language (高水準言語)</a></li><li><a href="/ja/docs/Glossary/HMAC">HMAC</a></li><li><a href="/ja/docs/Glossary/Hoisting">Hoisting (巻き上げ、ホイスティング)</a></li><li><a href="/ja/docs/Glossary/Host">Host (ホスト)</a></li><li><a href="/ja/docs/Glossary/Hotlink">Hotlink (直リンク)</a></li><li><a href="/ja/docs/Glossary/Houdini">Houdini</a></li><li><a href="/ja/docs/Glossary/HPKP">HPKP</a></li><li><a href="/ja/docs/Glossary/HSTS">HSTS</a></li><li><a href="/ja/docs/Glossary/HTML">HTML</a></li><li><a href="/ja/docs/Glossary/html_color_codes">HTML color codes</a></li><li><a href="/ja/docs/Glossary/HTML5">HTML5</a></li><li><a href="/ja/docs/Glossary/HTTP">HTTP</a></li><li><a href="/ja/docs/Glossary/HTTP_Content">HTTP Content (HTTP コンテンツ)</a></li><li><a href="/ja/docs/Glossary/HTTP_header">HTTP header (HTTP ヘッダー)</a></li><li><a href="/ja/docs/Glossary/HTTP_2">HTTP/2</a></li><li><a href="/ja/docs/Glossary/HTTP_3">HTTP/3</a></li><li><a href="/ja/docs/Glossary/HTTPS">HTTPS</a></li><li><a href="/ja/docs/Glossary/HTTPS_RR">HTTPS RR</a></li><li><a href="/ja/docs/Glossary/Hyperlink">Hyperlink (ハイパーリンク)</a></li><li><a href="/ja/docs/Glossary/Hypertext">Hypertext (ハイパーテキスト)</a></li><li><a href="/ja/docs/Glossary/IANA">IANA</a></li><li><a href="/ja/docs/Glossary/ICANN">ICANN</a></li><li><a href="/ja/docs/Glossary/ICE">ICE</a></li><li><a href="/ja/docs/Glossary/IDE">IDE (統合開発環境)</a></li><li><a href="/ja/docs/Glossary/Idempotent">Idempotent (べき等)</a></li><li><a href="/ja/docs/Glossary/Identifier">Identifier (識別子)</a></li><li><a href="/ja/docs/Glossary/Identity_provider">Identity provider (IdP)</a></li><li><a href="/ja/docs/Glossary/IDL">IDL (インターフェイス記述言語)</a></li><li><a href="/ja/docs/Glossary/IETF">IETF</a></li><li><a href="/ja/docs/Glossary/IIFE">IIFE (即時実行関数式)</a></li><li><a href="/ja/docs/Glossary/IMAP">IMAP</a></li><li><a href="/ja/docs/Glossary/Immutable">Immutable (不変)</a></li><li><a href="/ja/docs/Glossary/IndexedDB">IndexedDB</a></li><li><a href="/ja/docs/Glossary/Information_architecture">Information architecture (情報アーキテクチャ)</a></li><li><a href="/ja/docs/Glossary/Inheritance">Inheritance (継承)</a></li><li><a href="/ja/docs/Glossary/Ink_overflow">Ink overflow (インクオーバーフロー)</a></li><li><a href="/ja/docs/Glossary/Inline-level_content">Inline-level content (インラインレベルコンテンツ)</a></li><li><a href="/ja/docs/Glossary/Input_method_editor">Input method editor (インプットメソッドエディター)</a></li><li><a href="/ja/docs/Glossary/Inset_properties">Inset properties (インセットプロパティ)</a></li><li><a href="/ja/docs/Glossary/Instance">Instance (インスタンス)</a></li><li><a href="/ja/docs/Glossary/Interaction_to_next_paint">Interaction to Next Paint (INP)</a></li><li><a href="/ja/docs/Glossary/Internationalization">Internationalization (i18n) （国際化対応）</a></li><li><a href="/ja/docs/Glossary/Internet">Internet (インターネット)</a></li><li><a href="/ja/docs/Glossary/Interpolation">Interpolation (補間)</a></li><li><a href="/ja/docs/Glossary/Intrinsic_Size">Intrinsic size (内在サイズ)</a></li><li><a href="/ja/docs/Glossary/IP_Address">IP Address (IPアドレス)</a></li><li><a href="/ja/docs/Glossary/IPv4">IPv4</a></li><li><a href="/ja/docs/Glossary/IPv6">IPv6</a></li><li><a href="/ja/docs/Glossary/IRC">IRC</a></li><li><a href="/ja/docs/Glossary/ISO">ISO (国際標準化機構)</a></li><li><a href="/ja/docs/Glossary/ISP">ISP</a></li><li><a href="/ja/docs/Glossary/ITU">ITU (国際電気通信連合)</a></li><li><a href="/ja/docs/Glossary/Jank">Jank (ジャンク)</a></li><li><a href="/ja/docs/Glossary/Java">Java</a></li><li><a href="/ja/docs/Glossary/JavaScript">JavaScript</a></li><li><a href="/ja/docs/Glossary/Jitter">Jitter</a></li><li><a href="/ja/docs/Glossary/JPEG">JPEG</a></li><li><a href="/ja/docs/Glossary/JSON">JSON</a></li><li><a href="/ja/docs/Glossary/JSON_type_representation">JSON type representation</a></li><li><a href="/ja/docs/Glossary/Kebab_case">Kebab case (ケバブケース)</a></li><li><a href="/ja/docs/Glossary/Key">Key (暗号鍵)</a></li><li><a href="/ja/docs/Glossary/Keyword">Keyword (キーワード)</a></li><li><a href="/ja/docs/Glossary/Largest_contentful_paint">Largest contentful paint</a></li><li><a href="/ja/docs/Glossary/Latency">Latency(レイテンシー)</a></li><li><a href="/ja/docs/Glossary/Layout_viewport">Layout viewport</a></li><li><a href="/ja/docs/Glossary/Lazy_load">Lazy load (遅延読み込み)</a></li><li><a href="/ja/docs/Glossary/LGPL">LGPL</a></li><li><a href="/ja/docs/Glossary/Ligature">Ligature (合字)</a></li><li><a href="/ja/docs/Glossary/Literal">Literal (リテラル)</a></li><li><a href="/ja/docs/Glossary/Local_scope">Local scope (ローカルスコープ)</a></li><li><a href="/ja/docs/Glossary/Local_variable">Local variable (ローカル変数)</a></li><li><a href="/ja/docs/Glossary/Locale">Locale (ロケール)</a></li><li><a href="/ja/docs/Glossary/Localization">Localization (ローカライゼーション)</a></li><li><a href="/ja/docs/Glossary/Logical_properties">Logical properties</a></li><li><a href="/ja/docs/Glossary/Long_task">Long task (ロングタスク)</a></li><li><a href="/ja/docs/Glossary/Loop">Loop (ループ)</a></li><li><a href="/ja/docs/Glossary/Lossless_compression">Lossless compression (可逆圧縮)</a></li><li><a href="/ja/docs/Glossary/Lossy_compression">Lossy compression (非可逆圧縮)</a></li><li><a href="/ja/docs/Glossary/LTR">LTR (左書き)</a></li><li><a href="/ja/docs/Glossary/Main_Axis">Main Axis (主軸)</a></li><li><a href="/ja/docs/Glossary/Main_thread">Main thread (メインスレッド)</a></li><li><a href="/ja/docs/Glossary/Markup">markup (マークアップ)</a></li><li><a href="/ja/docs/Glossary/MathML">MathML</a></li><li><a href="/ja/docs/Glossary/Media">Media (メディア)</a></li><li><a href="/ja/docs/Glossary/Media_query">Media query (メディアクエリー)</a></li><li><a href="/ja/docs/Glossary/Metadata">Metadata (メタデータ)</a></li><li><a href="/ja/docs/Glossary/Method">Method (メソッド)</a></li><li><a href="/ja/docs/Glossary/Microsoft_Edge">Microsoft Edge</a></li><li><a href="/ja/docs/Glossary/Microsoft_Internet_Explorer">Microsoft Internet Explorer</a></li><li><a href="/ja/docs/Glossary/Middleware">Middleware (ミドルウェア)</a></li><li><a href="/ja/docs/Glossary/MIME">mime</a></li><li><a href="/ja/docs/Glossary/MIME_type">MIME type (MIMEタイプ)</a></li><li><a href="/ja/docs/Glossary/Minification">minification</a></li><li><a href="/ja/docs/Glossary/MitM">MitM (中間者攻撃)</a></li><li><a href="/ja/docs/Glossary/Mixin">Mixin (ミックスイン)</a></li><li><a href="/ja/docs/Glossary/Mobile_First">Mobile First (モバイルファースト)</a></li><li><a href="/ja/docs/Glossary/Modem">Modem (モデム)</a></li><li><a href="/ja/docs/Glossary/Modularity">Modularity (モジュール性)</a></li><li><a href="/ja/docs/Glossary/Mozilla_Firefox">Mozilla Firefox</a></li><li><a href="/ja/docs/Glossary/Mutable">Mutable (ミュータブル)</a></li><li><a href="/ja/docs/Glossary/MVC">MVC</a></li><li><a href="/ja/docs/Glossary/Namespace">Namespace (名前空間)</a></li><li><a href="/ja/docs/Glossary/NaN">NaN (非数)</a></li><li><a href="/ja/docs/Glossary/NAT">NAT</a></li><li><a href="/ja/docs/Glossary/Native">Native (ネイティブ)</a></li><li><a href="/ja/docs/Glossary/Navigation_directive">Navigation directive (ナビゲーションディレクティブ)</a></li><li><a href="/ja/docs/Glossary/Netscape_Navigator">Netscape Navigator</a></li><li><a href="/ja/docs/Glossary/Network_throttling">Network throttling (ネットワークスロットリング)</a></li><li><a href="/ja/docs/Glossary/NNTP">NNTP</a></li><li><a href="/ja/docs/Glossary/Node">Node</a></li><li><a href="/ja/docs/Glossary/Node.js">Node.js</a></li><li><a href="/ja/docs/Glossary/Non-normative">non-normative</a></li><li><a href="/ja/docs/Glossary/Normative">Normative</a></li><li><a href="/ja/docs/Glossary/Null">Null</a></li><li><a href="/ja/docs/Glossary/Nullish">Nullish value</a></li><li><a href="/ja/docs/Glossary/Number">Number</a></li><li><a href="/ja/docs/Glossary/Object">Object (オブジェクト)</a></li><li><a href="/ja/docs/Glossary/Object_reference">Object reference (オブジェクト参照)</a></li><li><a href="/ja/docs/Glossary/OOP">OOP (オブジェクト指向プログラミング)</a></li><li><a href="/ja/docs/Glossary/OpenGL">OpenGL</a></li><li><a href="/ja/docs/Glossary/OpenSSL">OpenSSL</a></li><li><a href="/ja/docs/Glossary/Opera_Browser">Opera Browser</a></li><li><a href="/ja/docs/Glossary/Operand">Operand (オペランド)</a></li><li><a href="/ja/docs/Glossary/Operator">Operator (演算子)</a></li><li><a href="/ja/docs/Glossary/Origin">Origin (オリジン)</a></li><li><a href="/ja/docs/Glossary/OTA">OTA</a></li><li><a href="/ja/docs/Glossary/OWASP">OWASP</a></li><li><a href="/ja/docs/Glossary/P2P">P2P (ピアーツーピアー)</a></li><li><a href="/ja/docs/Glossary/PAC">PAC</a></li><li><a href="/ja/docs/Glossary/Packet">Packet (パケット)</a></li><li><a href="/ja/docs/Glossary/Page_load_time">Page load time (ページ読み込み時間)</a></li><li><a href="/ja/docs/Glossary/Page_prediction">Page prediction</a></li><li><a href="/ja/docs/Glossary/Parameter">Parameter (仮引数)</a></li><li><a href="/ja/docs/Glossary/Parent_object">Parent object (親オブジェクト)</a></li><li><a href="/ja/docs/Glossary/Parse">Parse (構文解析)</a></li><li><a href="/ja/docs/Glossary/Parser">Parser (パーサー)</a></li><li><a href="/ja/docs/Glossary/Payload_body">Payload body</a></li><li><a href="/ja/docs/Glossary/Payload_header">Payload header (ペイロードヘッダー)</a></li><li><a href="/ja/docs/Glossary/PDF">PDF</a></li><li><a href="/ja/docs/Glossary/Perceived_performance">Perceived performance (知覚的パフォーマンス)</a></li><li><a href="/ja/docs/Glossary/Percent-encoding">Percent-encoding (パーセントエンコーディング)</a></li><li><a href="/ja/docs/Glossary/PHP">PHP</a></li><li><a href="/ja/docs/Glossary/Physical_properties">Physical properties (物理プロパティ)</a></li><li><a href="/ja/docs/Glossary/Pixel">Pixel (ピクセル)</a></li><li><a href="/ja/docs/Glossary/Placeholder_names">Placeholder names</a></li><li><a href="/ja/docs/Glossary/Plaintext">Plaintext (平文)</a></li><li><a href="/ja/docs/Glossary/Plugin">Plugin (プラグイン)</a></li><li><a href="/ja/docs/Glossary/PNG">PNG</a></li><li><a href="/ja/docs/Glossary/Polyfill">Polyfill (ポリフィル)</a></li><li><a href="/ja/docs/Glossary/Polymorphism">Polymorphism (多態性)</a></li><li><a href="/ja/docs/Glossary/POP">POP3</a></li><li><a href="/ja/docs/Glossary/Port">Port (ポート)</a></li><li><a href="/ja/docs/Glossary/Prefetch">Prefetch (先読み)</a></li><li><a href="/ja/docs/Glossary/Preflight_request">Preflight request (プリフライトリクエスト)</a></li><li><a href="/ja/docs/Glossary/Prerender">Prerender</a></li><li><a href="/ja/docs/Glossary/Presto">Presto</a></li><li><a href="/ja/docs/Glossary/Primitive">Primitive (プリミティブ)</a></li><li><a href="/ja/docs/Glossary/Privileged">Privileged</a></li><li><a href="/ja/docs/Glossary/Privileged_code">Privileged code (特権コード)</a></li><li><a href="/ja/docs/Glossary/Progressive_Enhancement">Progressive Enhancement (プログレッシブエンハンスメント)</a></li><li><a href="/ja/docs/Glossary/Progressive_web_apps">Progressive web apps (プログレッシブウェブアプリ)</a></li><li><a href="/ja/docs/Glossary/Promise">Promise (プロミス)</a></li><li><a href="/ja/docs/Glossary/Property">Property (プロパティ)</a></li><li><a href="/ja/docs/Glossary/Protocol">Protocol (プロトコル)</a></li><li><a href="/ja/docs/Glossary/Prototype">Prototype</a></li><li><a href="/ja/docs/Glossary/Prototype-based_programming">Prototype-based programming (プロトタイプベースプログラミング)</a></li><li><a href="/ja/docs/Glossary/Proxy_server">Proxy server (プロキシーサーバー)</a></li><li><a href="/ja/docs/Glossary/Pseudo-class">Pseudo-class</a></li><li><a href="/ja/docs/Glossary/Pseudo-element">Pseudo-element (擬似要素)</a></li><li><a href="/ja/docs/Glossary/Pseudocode">Pseudocode (擬似コード)</a></li><li><a href="/ja/docs/Glossary/Public-key_cryptography">Public-key cryptography (公開鍵暗号)</a></li><li><a href="/ja/docs/Glossary/Python">Python</a></li><li><a href="/ja/docs/Glossary/Quality_values">Quality values (品質値)</a></li><li><a href="/ja/docs/Glossary/Quaternion">Quaternion (四元数)</a></li><li><a href="/ja/docs/Glossary/QUIC">QUIC</a></li><li><a href="/ja/docs/Glossary/RAIL">RAIL</a></li><li><a href="/ja/docs/Glossary/RNG">Random Number Generator (乱数発生器)</a></li><li><a href="/ja/docs/Glossary/Raster_image">ラスターイメージ (Raster Image)</a></li><li><a href="/ja/docs/Glossary/Rate_limit">Rate limit (レート制限)</a></li><li><a href="/ja/docs/Glossary/RDF">RDF</a></li><li><a href="/ja/docs/Glossary/Real_User_Monitoring">Real User Monitoring（RUM）</a></li><li><a href="/ja/docs/Glossary/Recursion">Recursion (再帰)</a></li><li><a href="/ja/docs/Glossary/Reflow">Reflow (再フロー)</a></li><li><a href="/ja/docs/Glossary/Regular_expression">Regular expression (正規表現)</a></li><li><a href="/ja/docs/Glossary/Relying_party">Relying party</a></li><li><a href="/ja/docs/Glossary/Render_blocking">Render-blocking (レンダーブロッキング)</a></li><li><a href="/ja/docs/Glossary/Repaint">Repaint (再描画)</a></li><li><a href="/ja/docs/Glossary/Replay_attack">Replay attack</a></li><li><a href="/ja/docs/Glossary/Repo">Repo (リポジトリー)</a></li><li><a href="/ja/docs/Glossary/Reporting_directive">Reporting directive (報告ディレクティブ)</a></li><li><a href="/ja/docs/Glossary/Representation_header">Representation header (表現ヘッダー)</a></li><li><a href="/ja/docs/Glossary/Request_header">Request header (リクエストヘッダー)</a></li><li><a href="/ja/docs/Glossary/Resource_Timing">Resource Timing</a></li><li><a href="/ja/docs/Glossary/Response_header">Response header (レスポンスヘッダー)</a></li><li><a href="/ja/docs/Glossary/Responsive_web_design">Responsive web design (レスポンシブウェブデザイン)</a></li><li><a href="/ja/docs/Glossary/REST">REST</a></li><li><a href="/ja/docs/Glossary/RGB">RGB</a></li><li><a href="/ja/docs/Glossary/RIL">RIL</a></li><li><a href="/ja/docs/Glossary/Robots.txt">Robots.txt</a></li><li><a href="/ja/docs/Glossary/Round_Trip_Time">Round Trip Time (ラウンドトリップタイム)</a></li><li><a href="/ja/docs/Glossary/Router">Router (ルーター)</a></li><li><a href="/ja/docs/Glossary/RSS">RSS</a></li><li><a href="/ja/docs/Glossary/Rsync">Rsync</a></li><li><a href="/ja/docs/Glossary/RTCP">RTCP (RTP Control Protocol)</a></li><li><a href="/ja/docs/Glossary/RTF">RTF</a></li><li><a href="/ja/docs/Glossary/RTL">RTL (右書き)</a></li><li><a href="/ja/docs/Glossary/RTP">RTP (Real-time Transport Protocol) and SRTP (Secure RTP)</a></li><li><a href="/ja/docs/Glossary/RTSP">RTSP: Real-time streaming protocol</a></li><li><a href="/ja/docs/Glossary/Ruby">Ruby</a></li><li><a href="/ja/docs/Glossary/Safe">Safe (安全)</a></li><li><a href="/ja/docs/Glossary/Salt">Salt</a></li><li><a href="/ja/docs/Glossary/Same-origin_policy">Same-origin policy (同一オリジンポリシー)</a></li><li><a href="/ja/docs/Glossary/SCM">SCM</a></li><li><a href="/ja/docs/Glossary/Scope">Scope (スコープ)</a></li><li><a href="/ja/docs/Glossary/Screen_reader">Screen reader (スクリーンリーダー)</a></li><li><a href="/ja/docs/Glossary/Script-supporting_element">Script-supporting element (スクリプト対応要素)</a></li><li><a href="/ja/docs/Glossary/Scroll_boundary">Scroll boundary （スクロール境界）</a></li><li><a href="/ja/docs/Glossary/Scroll_chaining">Scroll chaining （スクロール連鎖）</a></li><li><a href="/ja/docs/Glossary/Scroll_container">Scroll container (スクロールコンテナー)</a></li><li><a href="/ja/docs/Glossary/Scroll_snap">Scroll snap</a></li><li><a href="/ja/docs/Glossary/SCTP">SCTP</a></li><li><a href="/ja/docs/Glossary/SDK">SDK (Software Development Kit)</a></li><li><a href="/ja/docs/Glossary/SDP">SDP</a></li><li><a href="/ja/docs/Glossary/Search_engine">Search engine (検索エンジン)</a></li><li><a href="/ja/docs/Glossary/Secure_Context">Secure Context (安全なコンテキスト)</a></li><li><a href="/ja/docs/Glossary/SSL">SSL</a></li><li><a href="/ja/docs/Glossary/CSS_Selector">Selector (セレクター) (CSS)</a></li><li><a href="/ja/docs/Glossary/Self-Executing_Anonymous_Function">Self-Executing Anonymous Function (自己実行無名関数)</a></li><li><a href="/ja/docs/Glossary/Semantics">Semantics (セマンティクス)</a></li><li><a href="/ja/docs/Glossary/SEO">SEO</a></li><li><a href="/ja/docs/Glossary/Serializable_object">Serializable object （シリアライズ可能オブジェクト）</a></li><li><a href="/ja/docs/Glossary/Serialization">Serialization (シリアライズ)</a></li><li><a href="/ja/docs/Glossary/Server">Server (サーバー)</a></li><li><a href="/ja/docs/Glossary/Server_Timing">Server Timing</a></li><li><a href="/ja/docs/Glossary/Session_Hijacking">Session Hijacking</a></li><li><a href="/ja/docs/Glossary/SGML">SGML</a></li><li><a href="/ja/docs/Glossary/Shadow_tree">Shadow tree (シャドウツリー)</a></li><li><a href="/ja/docs/Glossary/Shallow_copy">Shallow copy (シャローコピー)</a></li><li><a href="/ja/docs/Glossary/Shim">Shim (シム)</a></li><li><a href="/ja/docs/Glossary/Signature">Signature (シグネチャ)</a></li><li><a href="/ja/docs/Glossary/SIMD">SIMD</a></li><li><a href="/ja/docs/Glossary/SISD">SISD</a></li><li><a href="/ja/docs/Glossary/Site">Site (サイト)</a></li><li><a href="/ja/docs/Glossary/Site_map">Site map (サイトマップ)</a></li><li><a href="/ja/docs/Glossary/SLD">SLD</a></li><li><a href="/ja/docs/Glossary/Sloppy_mode">Sloppy モード</a></li><li><a href="/ja/docs/Glossary/Slug">Slug (スラグ)</a></li><li><a href="/ja/docs/Glossary/Smoke_Test">Smoke Test (スモークテスト)</a></li><li><a href="/ja/docs/Glossary/SMPTE">SMPTE (Society of Motion Picture and Television Engineers)</a></li><li><a href="/ja/docs/Glossary/SMTP">SMTP</a></li><li><a href="/ja/docs/Glossary/Snake_case">Snake case (スネークケース)</a></li><li><a href="/ja/docs/Glossary/Snap_positions">Snap positions</a></li><li><a href="/ja/docs/Glossary/SOAP">SOAP</a></li><li><a href="/ja/docs/Glossary/SPA">SPA (単一ページアプリケーション)</a></li><li><a href="/ja/docs/Glossary/Specification">Specification</a></li><li><a href="/ja/docs/Glossary/Speculative_parsing">Speculative parsing (投機的解析)</a></li><li><a href="/ja/docs/Glossary/Speed_index">Speed index (スピードインデックス)</a></li><li><a href="/ja/docs/Glossary/SQL">SQL</a></li><li><a href="/ja/docs/Glossary/SQL_Injection">SQL Injection (SQL インジェクション)</a></li><li><a href="/ja/docs/Glossary/SRI">SRI</a></li><li><a href="/ja/docs/Glossary/Stacking_context">Stacking context (重ね合わせコンテキスト)</a></li><li><a href="/ja/docs/Glossary/State_machine">State machine</a></li><li><a href="/ja/docs/Glossary/Statement">Statement (文)</a></li><li><a href="/ja/docs/Glossary/Static_method">Static method (静的メソッド)</a></li><li><a href="/ja/docs/Glossary/SSG">Static site generator (SSG)</a></li><li><a href="/ja/docs/Glossary/Static_typing">Static typing (静的型付け)</a></li><li><a href="/ja/docs/Glossary/Sticky_activation">Sticky activation (粘着的な有効化)</a></li><li><a href="/ja/docs/Glossary/Strict_mode">Strict mode (厳格モード)</a></li><li><a href="/ja/docs/Glossary/String">String (文字列)</a></li><li><a href="/ja/docs/Glossary/Stringifier">Stringifier (文字列化子)</a></li><li><a href="/ja/docs/Glossary/STUN">STUN</a></li><li><a href="/ja/docs/Glossary/Style_origin">Style origin (スタイルオリジン)</a></li><li><a href="/ja/docs/Glossary/Stylesheet">Stylesheet (スタイルシート)</a></li><li><a href="/ja/docs/Glossary/Submit_button">Submit button (送信ボタン)</a></li><li><a href="/ja/docs/Glossary/SVG">SVG</a></li><li><a href="/ja/docs/Glossary/SVN">SVN</a></li><li><a href="/ja/docs/Glossary/Symbol">Symbol</a></li><li><a href="/ja/docs/Glossary/Symmetric-key_cryptography">Symmetric-key cryptography (共通鍵暗号)</a></li><li><a href="/ja/docs/Glossary/Synchronous">Synchronous (同期通信方式)</a></li><li><a href="/ja/docs/Glossary/Syntax">Syntax (構文)</a></li><li><a href="/ja/docs/Glossary/Syntax_error">Syntax error (構文エラー)</a></li><li><a href="/ja/docs/Glossary/Synthetic_monitoring">Synthetic monitoring (合成モニタリング)</a></li><li><a href="/ja/docs/Glossary/Table_Grid_Box">Table Grid Box (表グリッドボックス)</a></li><li><a href="/ja/docs/Glossary/Table_Wrapper_Box">Table Wrapper Box (表ラッパーボックス)</a></li><li><a href="/ja/docs/Glossary/Tag">Tag (タグ)</a></li><li><a href="/ja/docs/Glossary/TCP">TCP</a></li><li><a href="/ja/docs/Glossary/TCP_handshake">TCP handshake (TCP ハンドシェイク)</a></li><li><a href="/ja/docs/Glossary/TCP_slow_start">TCP slow start</a></li><li><a href="/ja/docs/Glossary/Telnet">Telnet</a></li><li><a href="/ja/docs/Glossary/Texel">Texel (テクセル)</a></li><li><a href="/ja/docs/Glossary/Khronos">The Khronos Group (クロノス・グループ)</a></li><li><a href="/ja/docs/Glossary/Thread">Thread (スレッド)</a></li><li><a href="/ja/docs/Glossary/Three_js">Three js</a></li><li><a href="/ja/docs/Glossary/Throttle">Throttle (スロットル)</a></li><li><a href="/ja/docs/Glossary/Time_to_first_byte">Time to first byte （最初のバイトまでの時間）</a></li><li><a href="/ja/docs/Glossary/Time_to_interactive">Time to interactive (対話までの時間)</a></li><li><a href="/ja/docs/Glossary/TLD">TLD (トップレベルドメイン)</a></li><li><a href="/ja/docs/Glossary/TOFU">TOFU</a></li><li><a href="/ja/docs/Glossary/Top_layer">Top layer (最上位レイヤー)</a></li><li><a href="/ja/docs/Glossary/Transient_activation">Transient activation (一時的な有効化)</a></li><li><a href="/ja/docs/Glossary/TLS">Transport Layer Security (TLS)</a></li><li><a href="/ja/docs/Glossary/Tree_shaking">Tree shaking</a></li><li><a href="/ja/docs/Glossary/Trident">Trident</a></li><li><a href="/ja/docs/Glossary/Truthy">Truthy (真値)</a></li><li><a href="/ja/docs/Glossary/TTL">TTL</a></li><li><a href="/ja/docs/Glossary/TURN">TURN</a></li><li><a href="/ja/docs/Glossary/Type">Type (型)</a></li><li><a href="/ja/docs/Glossary/Type_coercion">Type coercion (型強制)</a></li><li><a href="/ja/docs/Glossary/Type_Conversion">Type conversion (型変換)</a></li><li><a href="/ja/docs/Glossary/TypeScript">TypeScript</a></li><li><a href="/ja/docs/Glossary/UAAG">UAAG</a></li><li><a href="/ja/docs/Glossary/UDP">UDP (User Datagram Protocol)</a></li><li><a href="/ja/docs/Glossary/UI">UI</a></li><li><a href="/ja/docs/Glossary/Undefined">undefined</a></li><li><em><a href="/ja/docs/Glossary/Unicode" aria-current="page">Unicode</a></em></li><li><a href="/ja/docs/Glossary/Unix_time">Unix time (UNIX 時間)</a></li><li><a href="/ja/docs/Glossary/URI">URI</a></li><li><a href="/ja/docs/Glossary/URL">URL</a></li><li><a href="/ja/docs/Glossary/URN">URN</a></li><li><a href="/ja/docs/Glossary/Usenet">Usenet</a></li><li><a href="/ja/docs/Glossary/User_agent">User agent (ユーザーエージェント)</a></li><li><a href="/ja/docs/Glossary/UTF-8">UTF-8</a></li><li><a href="/ja/docs/Glossary/UUID">UUID</a></li><li><a href="/ja/docs/Glossary/UX">UX</a></li><li><a href="/ja/docs/Glossary/Validator">Validator (バリデーター)</a></li><li><a href="/ja/docs/Glossary/Value">Value (値)</a></li><li><a href="/ja/docs/Glossary/Variable">Variable (変数)</a></li><li><a href="/ja/docs/Glossary/Vendor_Prefix">Vendor Prefix (ベンダー接頭辞)</a></li><li><a href="/ja/docs/Glossary/Viewport">Viewport (ビューポート)</a></li><li><a href="/ja/docs/Glossary/Visual_Viewport">Visual Viewport (視覚的ビューポート)</a></li><li><a href="/ja/docs/Glossary/Void_element">Void element （空要素）</a></li><li><a href="/ja/docs/Glossary/VoIP">VoIP</a></li><li><a href="/ja/docs/Glossary/W3C">W3C</a></li><li><a href="/ja/docs/Glossary/WAI">WAI</a></li><li><a href="/ja/docs/Glossary/WCAG">WCAG</a></li><li><a href="/ja/docs/Glossary/Web_performance">Web performance (ウェブの性能)</a></li><li><a href="/ja/docs/Glossary/Web_server">Web server (ウェブサーバー)</a></li><li><a href="/ja/docs/Glossary/Web_standards">Web standards (ウェブ標準)</a></li><li><a href="/ja/docs/Glossary/WebAssembly">WebAssembly</a></li><li><a href="/ja/docs/Glossary/WebDAV">WebDAV</a></li><li><a href="/ja/docs/Glossary/WebExtensions">WebExtensions</a></li><li><a href="/ja/docs/Glossary/WebGL">WebGL</a></li><li><a href="/ja/docs/Glossary/WebIDL">WebIDL</a></li><li><a href="/ja/docs/Glossary/WebKit">WebKit</a></li><li><a href="/ja/docs/Glossary/WebM">WebM</a></li><li><a href="/ja/docs/Glossary/WebP">WebP</a></li><li><a href="/ja/docs/Glossary/WebRTC">WebRTC</a></li><li><a href="/ja/docs/Glossary/WebSockets">WebSockets</a></li><li><a href="/ja/docs/Glossary/WebVTT">WebVTT</a></li><li><a href="/ja/docs/Glossary/WHATWG">WHATWG</a></li><li><a href="/ja/docs/Glossary/Whitespace">Whitespace (ホワイトスペース)</a></li><li><a href="/ja/docs/Glossary/WindowProxy">WindowProxy</a></li><li><a href="/ja/docs/Glossary/World_Wide_Web">World Wide Web</a></li><li><a href="/ja/docs/Glossary/Wrapper">Wrapper (ラッパー)</a></li><li><a href="/ja/docs/Glossary/XForms">XForms</a><abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">非推奨</span> </abbr></li><li><a href="/ja/docs/Glossary/XHTML">XHTML</a></li><li><a href="/ja/docs/Glossary/XInclude">XInclude</a></li><li><a href="/ja/docs/Glossary/XLink">XLink</a></li><li><a href="/ja/docs/Glossary/XML">XML</a></li><li><a href="/ja/docs/Glossary/XMLHttpRequest">XHR (XMLHttpRequest)</a></li><li><a href="/ja/docs/Glossary/XPath">XPath</a></li><li><a href="/ja/docs/Glossary/XQuery">XQuery</a></li><li><a href="/ja/docs/Glossary/XSLT">XSLT</a></li><li><a href="/ja/docs/Glossary/Zstandard_compression">Zstandard compression</a></li></ol> </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">この記事では</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#関連項目">関連項目</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="ja"><header><h1>Unicode</h1></header><div class="section-content"><p>Unicode とは、世界の様々な言語、書式、記号に、番号を割り当てて定義した標準の<a href="/ja/docs/Glossary/Character_set">文字コード</a> です。一つ一つの<a href="/ja/docs/Glossary/Character">文字</a> に番号を割り当てることで、プログラマーは、どの言語が混ざっていても、コンピューターに保存、処理、伝送させるような<a href="/ja/docs/Glossary/Character_encoding">文字エンコーディング</a>を同じファイルやプログラムの中に作ることができます。</p> <p>Unicode ができる以前は、同じデータのなかに異なる言語を入れることは難しく、誤りが起こりがちでした。例えば、ある文字コードは日本語の文字を格納するためのもので、別のある文字コードはアラビア文字を格納するためのものだとします。もしデータのどの部分がどの文字コードであるか明確に示していない場合、他のプログラムやコンピューターは、文章を誤って表示してしまったり、処理中にデータを破損してしまったりしていました。二重引用符 (<code>“”</code>)のような文字が <code>Ã‚Â£</code> のようなわけのわからないものに置き換わっているのを見たことがあるかもしれません。それがこの問題です。<a href="https://ja.wikipedia.org/wiki/%E6%96%87%E5%AD%97%E5%8C%96%E3%81%91" class="external" target="_blank">文字化け</a>として知られています。</p> <p>ウェブ上でもっとも一般的な文字エンコーディングは <a href="/ja/docs/Glossary/UTF-8">UTF-8</a> です。UTF-16 や廃止された UCS-2 といったエンコーディングも存在しますが、UTF-8 が推奨されています。</p></div><section aria-labelledby="関連項目"><h2 id="関連項目"><a href="#関連項目">関連項目</a></h2><div class="section-content"><ul> <li>Wikipedia の <a href="https://ja.wikipedia.org/wiki/Unicode" class="external" target="_blank">Unicode</a></li> <li><a href="https://www.unicode.org/standard/principles.html" class="external" target="_blank">The Unicode Standard: A Technical Introduction</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 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(アクセシブル名)</a></li><li><a href=\"/ja/docs/Glossary/Adobe_Flash\">Adobe Flash</a></li><li><a href=\"/ja/docs/Glossary/Advance_measure\">Advance measure (送り幅)</a></li><li><a href=\"/ja/docs/Glossary/AJAX\">AJAX</a></li><li><a href=\"/ja/docs/Glossary/Algorithm\">Algorithm (アルゴリズム)</a></li><li><a href=\"/ja/docs/Glossary/Alignment_Container\">Alignment container (配置コンテナー)</a></li><li><a href=\"/ja/docs/Glossary/Alignment_Subject\">Alignment subject (配置対象物)</a></li><li><a href=\"/ja/docs/Glossary/Alpha\">Alpha (アルファチャンネル)</a></li><li><a href=\"/ja/docs/Glossary/ALPN\">ALPN</a></li><li><a href=\"/ja/docs/Glossary/API\">API</a></li><li><a href=\"/ja/docs/Glossary/Apple_Safari\">Apple Safari</a></li><li><a href=\"/ja/docs/Glossary/Application_context\">Application Context (アプリケーションコンテキスト)</a></li><li><a href=\"/ja/docs/Glossary/Argument\">Argument (実引数)</a></li><li><a href=\"/ja/docs/Glossary/ARIA\">ARIA</a></li><li><a href=\"/ja/docs/Glossary/ARPA\">ARPA</a></li><li><a href=\"/ja/docs/Glossary/Arpanet\">ARPANET</a></li><li><a href=\"/ja/docs/Glossary/Array\">Array (配列)</a></li><li><a href=\"/ja/docs/Glossary/ASCII\">ASCII</a></li><li><a href=\"/ja/docs/Glossary/Aspect_ratio\">Aspect ratio (アスペクト比)</a></li><li><a href=\"/ja/docs/Glossary/Asynchronous\">Asynchronous （非同期）</a></li><li><a href=\"/ja/docs/Glossary/ATAG\">ATAG</a></li><li><a href=\"/ja/docs/Glossary/Attribute\">Attribute (属性)</a></li><li><a href=\"/ja/docs/Glossary/Authentication\">Authentication</a></li><li><a href=\"/ja/docs/Glossary/Authenticator\">Authenticator</a></li><li><a href=\"/ja/docs/Glossary/Bandwidth\">Bandwidth (帯域幅)</a></li><li><a href=\"/ja/docs/Glossary/Base64\">Base64</a></li><li><a href=\"/ja/docs/Glossary/Baseline\">Baseline</a></li><li><a href=\"/ja/docs/Glossary/Beacon\">Beacon (ビーコン)</a></li><li><a href=\"/ja/docs/Glossary/Bezier_curve\">Bézier curve (ベジェ曲線)</a></li><li><a href=\"/ja/docs/Glossary/bfcache\">bfcache</a></li><li><a href=\"/ja/docs/Glossary/BiDi\">BiDi (双方向)</a></li><li><a href=\"/ja/docs/Glossary/BigInt\">BigInt</a></li><li><a href=\"/ja/docs/Glossary/Binding\">Binding （バインド）</a></li><li><a href=\"/ja/docs/Glossary/Bitwise_flags\">Bitwise flags (ビットフラグ)</a></li><li><a href=\"/ja/docs/Glossary/Blink\">Blink</a></li><li><a href=\"/ja/docs/Glossary/blink_element\"><blink>: 点滅要素</a></li><li><a href=\"/ja/docs/Glossary/Block\">Block (ブロック)</a></li><li><a href=\"/ja/docs/Glossary/Block_cipher_mode_of_operation\">Block cipher mode of operation (暗号利用モード)</a></li><li><a href=\"/ja/docs/Glossary/Block-level_content\">Block-level content (ブロックレベルコンテンツ)</a></li><li><a href=\"/ja/docs/Glossary/Boolean\">Boolean</a></li><li><a href=\"/ja/docs/Glossary/Bounding_box\">Bounding Box (バウンディングボックス)</a></li><li><a href=\"/ja/docs/Glossary/Breadcrumb\">Breadcrumb (パンくずリスト)</a></li><li><a href=\"/ja/docs/Glossary/Brotli_compression\">Brotli</a></li><li><a href=\"/ja/docs/Glossary/Browser\">Browser (ブラウザー)</a></li><li><a href=\"/ja/docs/Glossary/Browsing_context\">Browsing context (閲覧コンテキスト)</a></li><li><a href=\"/ja/docs/Glossary/Buffer\">buffer (バッファー)</a></li><li><a href=\"/ja/docs/Glossary/Cache\">Cache(キャッシュ)</a></li><li><a href=\"/ja/docs/Glossary/Cacheable\">Cacheable (キャッシュ可能)</a></li><li><a href=\"/ja/docs/Glossary/CalDAV\">CalDAV</a></li><li><a href=\"/ja/docs/Glossary/Call_stack\">Call stack (コールスタック)</a></li><li><a href=\"/ja/docs/Glossary/Callback_function\">Callback function (コールバック関数)</a></li><li><a href=\"/ja/docs/Glossary/Camel_case\">Camel case (キャメルケース)</a></li><li><a href=\"/ja/docs/Glossary/Canonical_order\">Canonical order (正規順序)</a></li><li><a href=\"/ja/docs/Glossary/Canvas\">Canvas</a></li><li><a href=\"/ja/docs/Glossary/Card_sorting\">Card sorting (カードソート)</a></li><li><a href=\"/ja/docs/Glossary/CardDAV\">CardDAV</a></li><li><a href=\"/ja/docs/Glossary/Caret\">caret (キャレット)</a></li><li><a href=\"/ja/docs/Glossary/CDN\">CDN</a></li><li><a href=\"/ja/docs/Glossary/Certificate_authority\">Certificate authority (認証局)</a></li><li><a href=\"/ja/docs/Glossary/Certified\">Certified</a></li><li><a href=\"/ja/docs/Glossary/Challenge\">Challenge-response authentication (チャレンジレスポンス認証)</a></li><li><a href=\"/ja/docs/Glossary/Character\">Character (文字)</a></li><li><a href=\"/ja/docs/Glossary/Character_encoding\">Character encoding (文字エンコーディング)</a></li><li><a href=\"/ja/docs/Glossary/Character_reference\">Character reference</a></li><li><a href=\"/ja/docs/Glossary/Character_set\">Character set (文字コード)</a></li><li><a href=\"/ja/docs/Glossary/Chrome\">Chrome (クローム)</a></li><li><a href=\"/ja/docs/Glossary/CIA\">CIA（Confidentiality, Integrity, Availability）</a></li><li><a href=\"/ja/docs/Glossary/Cipher\">Cipher (サイファー)</a></li><li><a href=\"/ja/docs/Glossary/Cipher_suite\">Cipher suite (暗号スイート)</a></li><li><a href=\"/ja/docs/Glossary/Ciphertext\">Ciphertext (暗号文)</a></li><li><a href=\"/ja/docs/Glossary/Class\">Class (クラス)</a></li><li><a href=\"/ja/docs/Glossary/Clickjacking\">Clickjacking</a></li><li><a href=\"/ja/docs/Glossary/Closure\">Closure (クロージャ)</a></li><li><a href=\"/ja/docs/Glossary/Cloud\">Cloud</a></li><li><a href=\"/ja/docs/Glossary/Cloud_computing\">Cloud computing</a></li><li><a href=\"/ja/docs/Glossary/CMS\">CMS</a></li><li><a href=\"/ja/docs/Glossary/Code_point\">Code point (コードポイント)</a></li><li><a href=\"/ja/docs/Glossary/Code_splitting\">Code splitting (コード分割)</a></li><li><a href=\"/ja/docs/Glossary/Code_unit\">Code unit (コード単位)</a></li><li><a href=\"/ja/docs/Glossary/Codec\">Codec (コーデック)</a></li><li><a href=\"/ja/docs/Glossary/Color_space\">Color space (色空間)</a></li><li><a href=\"/ja/docs/Glossary/Color_wheel\">Color wheel (色相環)</a></li><li><a href=\"/ja/docs/Glossary/Compile\">Compile (コンパイル)</a></li><li><a href=\"/ja/docs/Glossary/Compile_time\">Compile time (コンパイル時間)</a></li><li><a href=\"/ja/docs/Glossary/Composite_operation\">Composite operation (合成演算)</a></li><li><a href=\"/ja/docs/Glossary/Computer_Programming\">Computer Programming (コンピュータープログラミング)</a></li><li><a href=\"/ja/docs/Glossary/Conditional\">Conditional (条件式)</a></li><li><a href=\"/ja/docs/Glossary/Constant\">Constant (定数)</a></li><li><a href=\"/ja/docs/Glossary/Constructor\">Constructor (コンストラクター)</a></li><li><a href=\"/ja/docs/Glossary/Content_header\">Content header (コンテンツヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Continuous_Media\">Continuous Media (連続的メディア)</a></li><li><a href=\"/ja/docs/Glossary/Control_flow\">Control flow (制御フロー)</a></li><li><a href=\"/ja/docs/Glossary/Cookie\">Cookie</a></li><li><a href=\"/ja/docs/Glossary/Copyleft\">Copyleft (コピーレフト)</a></li><li><a href=\"/ja/docs/Glossary/CORS\">CORS</a></li><li><a href=\"/ja/docs/Glossary/CORS-safelisted_request_header\">CORS-safelisted request header (CORS セーフリストリクエストヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/CORS-safelisted_response_header\">CORS-safelisted response header (CORS セーフリストレスポンスヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Crawler\">Crawler (クローラー)</a></li><li><a href=\"/ja/docs/Glossary/Credential\">Credential</a></li><li><a href=\"/ja/docs/Glossary/CRLF\">CRLF</a></li><li><a href=\"/ja/docs/Glossary/Cross_Axis\">Cross Axis (交差軸)</a></li><li><a href=\"/ja/docs/Glossary/Cross-site_scripting\">Cross-site scripting (クロスサイトスクリプティング)</a></li><li><a href=\"/ja/docs/Glossary/CRUD\">CRUD</a></li><li><a href=\"/ja/docs/Glossary/Cryptanalysis\">Cryptanalysis (暗号解読)</a></li><li><a href=\"/ja/docs/Glossary/Cryptographic_hash_function\">Cryptographic hash function (暗号学的ハッシュ関数)</a></li><li><a href=\"/ja/docs/Glossary/Cryptography\">Cryptography (暗号学)</a></li><li><a href=\"/ja/docs/Glossary/CSP\">CSP</a></li><li><a href=\"/ja/docs/Glossary/CSRF\">CSRF</a></li><li><a href=\"/ja/docs/Glossary/CSS\">CSS</a></li><li><a href=\"/ja/docs/Glossary/CSSOM\">CSS Object Model (CSSOM)</a></li><li><a href=\"/ja/docs/Glossary/CSS_pixel\">CSS pixel</a></li><li><a href=\"/ja/docs/Glossary/CSS_preprocessor\">CSS preprocessor (CSS プリプロセッサー)</a></li><li><a href=\"/ja/docs/Glossary/CLS\">Cumulative Layout Shift (CLS)</a></li><li><a href=\"/ja/docs/Glossary/Data_structure\">Data structure (データ構造)</a></li><li><a href=\"/ja/docs/Glossary/Database\">Database</a></li><li><a href=\"/ja/docs/Glossary/Debounce\">Debounce (デバウンス)</a></li><li><a href=\"/ja/docs/Glossary/Decryption\">Decryption (復号)</a></li><li><a href=\"/ja/docs/Glossary/Deep_copy\">Deep copy (ディープコピー)</a></li><li><a href=\"/ja/docs/Glossary/Delta\">Delta (デルタ)</a></li><li><a href=\"/ja/docs/Glossary/Denial_of_Service\">Denial of Service (サービス拒否)</a></li><li><a href=\"/ja/docs/Glossary/Deno\">Deno</a></li><li><a href=\"/ja/docs/Glossary/CSS_Descriptor\">Descriptor (CSS) (記述子)</a></li><li><a href=\"/ja/docs/Glossary/Deserialization\">Deserialization (デシリアライズ)</a></li><li><a href=\"/ja/docs/Glossary/Developer_Tools\">Developer Tools (開発者ツール)</a></li><li><a href=\"/ja/docs/Glossary/Digest\">Digest</a></li><li><a href=\"/ja/docs/Glossary/Digital_certificate\">Digital certificate (デジタル証明書)</a></li><li><a href=\"/ja/docs/Glossary/Digital_signature\">Digital signature</a></li><li><a href=\"/ja/docs/Glossary/Distributed_Denial_of_Service\">Distributed Denial of Service</a></li><li><a href=\"/ja/docs/Glossary/DMZ\">DMZ</a></li><li><a href=\"/ja/docs/Glossary/DNS\">DNS</a></li><li><a href=\"/ja/docs/Glossary/Doctype\">Doctype</a></li><li><a href=\"/ja/docs/Glossary/Document_directive\">Document directive (文書ディレクティブ)</a></li><li><a href=\"/ja/docs/Glossary/Document_environment\">Document environment (文書環境)</a></li><li><a href=\"/ja/docs/Glossary/DOM\">DOM (Document Object Model)</a></li><li><a href=\"/ja/docs/Glossary/Domain\">Domain (ドメイン)</a></li><li><a href=\"/ja/docs/Glossary/Domain_name\">Domain name (ドメイン名)</a></li><li><a href=\"/ja/docs/Glossary/Domain_sharding\">Domain sharding (ドメインシャーディング)</a></li><li><a href=\"/ja/docs/Glossary/Dominator\">Dominator (ドミネーター)</a></li><li><a href=\"/ja/docs/Glossary/DOS_attack\">DoS attack (DoS 攻撃)</a></li><li><a href=\"/ja/docs/Glossary/DSL\">DSL</a></li><li><a href=\"/ja/docs/Glossary/DTLS\">DTLS (Datagram Transport Layer Security)</a></li><li><a href=\"/ja/docs/Glossary/DTMF\">DTMF (Dual-Tone Multi-Frequency signaling)</a></li><li><a href=\"/ja/docs/Glossary/Dynamic_typing\">Dynamic typing (動的型付け)</a></li><li><a href=\"/ja/docs/Glossary/ECMA\">ECMA</a></li><li><a href=\"/ja/docs/Glossary/ECMAScript\">ECMAScript</a></li><li><a href=\"/ja/docs/Glossary/Effective_connection_type\">Effective connection type (有効接続種別)</a></li><li><a href=\"/ja/docs/Glossary/Element\">Element (要素)</a></li><li><a href=\"/ja/docs/Glossary/Encapsulation\">Encapsulation (カプセル化)</a></li><li><a href=\"/ja/docs/Glossary/Encryption\">Encryption (暗号化)</a></li><li><a href=\"/ja/docs/Glossary/Endianness\">Endianness (エンディアン)</a></li><li><a href=\"/ja/docs/Glossary/Engine\">Engine</a></li><li><a href=\"/ja/docs/Glossary/Entity\">Entity (エンティティ)</a></li><li><a href=\"/ja/docs/Glossary/Entity_header\">Entity header (エンティティヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Enumerated\">Enumerated (列挙型)</a></li><li><a href=\"/ja/docs/Glossary/eTLD\">eTLD</a></li><li><a href=\"/ja/docs/Glossary/Event\">Event (イベント)</a></li><li><a href=\"/ja/docs/Glossary/Exception\">Exception (例外)</a></li><li><a href=\"/ja/docs/Glossary/EXIF\">EXIF</a></li><li><a href=\"/ja/docs/Glossary/Expando\">Expando</a></li><li><a href=\"/ja/docs/Glossary/Fallback_Alignment\">Fallback alignment (代替配置)</a></li><li><a href=\"/ja/docs/Glossary/Falsy\">Falsy (偽値)</a></li><li><a href=\"/ja/docs/Glossary/Favicon\">Favicon (ファビコン)</a></li><li><a href=\"/ja/docs/Glossary/Federated_identity\">Federated identity</a></li><li><a href=\"/ja/docs/Glossary/Fetch_directive\">Fetch directive (フェッチディレクティブ)</a></li><li><a href=\"/ja/docs/Glossary/Fetch_metadata_request_header\">Fetch metadata request header (フェッチメタデータリクエストヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Fingerprinting\">Fingerprinting (フィンガープリンティング)</a></li><li><a href=\"/ja/docs/Glossary/Firefox_OS\">Firefox OS</a></li><li><a href=\"/ja/docs/Glossary/Firewall\">firewall (ファイアウォール)</a></li><li><a href=\"/ja/docs/Glossary/First_contentful_paint\">First contentful paint</a></li><li><a href=\"/ja/docs/Glossary/First_CPU_idle\">First CPU idle (最初の CPU アイドル)</a></li><li><a href=\"/ja/docs/Glossary/First_input_delay\">First Input Delay (FID)</a><abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">非推奨</span>\n</abbr></li><li><a href=\"/ja/docs/Glossary/First_meaningful_paint\">First Meaningful Paint</a></li><li><a href=\"/ja/docs/Glossary/First_paint\">First paint</a></li><li><a href=\"/ja/docs/Glossary/First-class_Function\">First-class Function (第一級関数)</a></li><li><a href=\"/ja/docs/Glossary/Flex\">Flex</a></li><li><a href=\"/ja/docs/Glossary/Flex_Container\">Flex Container (フレックスコンテナー)</a></li><li><a href=\"/ja/docs/Glossary/Flex_Item\">Flex Item (フレックスアイテム)</a></li><li><a href=\"/ja/docs/Glossary/Flexbox\">Flexbox (フレックスボックス)</a></li><li><a href=\"/ja/docs/Glossary/Flow_relative_values\">Flow relative values (フロー関連値)</a></li><li><a href=\"/ja/docs/Glossary/Forbidden_header_name\">Forbidden header name (禁止ヘッダー名)</a></li><li><a href=\"/ja/docs/Glossary/Forbidden_response_header_name\">Forbidden response header name (禁止レスンポンスヘッダー名)</a></li><li><a href=\"/ja/docs/Glossary/Fork\">Fork (フォーク)</a></li><li><a href=\"/ja/docs/Glossary/Fragmentainer\">Fragmentainer</a></li><li><a href=\"/ja/docs/Glossary/FPS\">frame rate (フレームレート, FPS)</a></li><li><a href=\"/ja/docs/Glossary/FTP\">FTP</a></li><li><a href=\"/ja/docs/Glossary/FTU\">FTU</a></li><li><a href=\"/ja/docs/Glossary/Function\">Function (関数)</a></li><li><a href=\"/ja/docs/Glossary/Fuzzing\">Fuzz testing (ファズテスティング)</a></li><li><a href=\"/ja/docs/Glossary/Gamut\">Gamut (色域)</a></li><li><a href=\"/ja/docs/Glossary/Garbage_collection\">Garbage collection (ガベージコレクション)</a></li><li><a href=\"/ja/docs/Glossary/Gecko\">Gecko</a></li><li><a href=\"/ja/docs/Glossary/General_header\">General header (一般ヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/GIF\">GIF</a></li><li><a href=\"/ja/docs/Glossary/Git\">Git</a></li><li><a href=\"/ja/docs/Glossary/Global_object\">Global object (グローバルオブジェクト)</a></li><li><a href=\"/ja/docs/Glossary/Global_scope\">Global scope (グローバルスコープ)</a></li><li><a href=\"/ja/docs/Glossary/Global_variable\">Global variable (グローバル変数)</a></li><li><a href=\"/ja/docs/Glossary/Glyph\">Glyph (字体)</a></li><li><a href=\"/ja/docs/Glossary/Google_Chrome\">Google Chrome</a></li><li><a href=\"/ja/docs/Glossary/GPL\">GPL</a></li><li><a href=\"/ja/docs/Glossary/GPU\">GPU</a></li><li><a href=\"/ja/docs/Glossary/Graceful_degradation\">Graceful degradation (グレースフルデグラデーション)</a></li><li><a href=\"/ja/docs/Glossary/Grid\">Grid (グリッド)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Areas\">Grid Areas (グリッド領域)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Axis\">Grid Axis (グリッド軸)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Cell\">Grid Cell (グリッドセル)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Column\">Grid Column (グリッド列)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Container\">Grid container</a></li><li><a href=\"/ja/docs/Glossary/Grid_Lines\">Grid Line (グリッド線)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Row\">Grid Row (グリッド行)</a></li><li><a href=\"/ja/docs/Glossary/Grid_Tracks\">Grid Track (グリッドトラック)</a></li><li><a href=\"/ja/docs/Glossary/Gutters\">Gutter (溝)</a></li><li><a href=\"/ja/docs/Glossary/gzip_compression\">gzip compression (gzip 圧縮)</a></li><li><a href=\"/ja/docs/Glossary/Hash\">Hash (ハッシュ)</a></li><li><a href=\"/ja/docs/Glossary/Head\">Head</a></li><li><a href=\"/ja/docs/Glossary/High-level_programming_language\">High-level programming language (高水準言語)</a></li><li><a href=\"/ja/docs/Glossary/HMAC\">HMAC</a></li><li><a href=\"/ja/docs/Glossary/Hoisting\">Hoisting (巻き上げ、ホイスティング)</a></li><li><a href=\"/ja/docs/Glossary/Host\">Host (ホスト)</a></li><li><a href=\"/ja/docs/Glossary/Hotlink\">Hotlink (直リンク)</a></li><li><a href=\"/ja/docs/Glossary/Houdini\">Houdini</a></li><li><a href=\"/ja/docs/Glossary/HPKP\">HPKP</a></li><li><a href=\"/ja/docs/Glossary/HSTS\">HSTS</a></li><li><a href=\"/ja/docs/Glossary/HTML\">HTML</a></li><li><a href=\"/ja/docs/Glossary/html_color_codes\">HTML color codes</a></li><li><a href=\"/ja/docs/Glossary/HTML5\">HTML5</a></li><li><a href=\"/ja/docs/Glossary/HTTP\">HTTP</a></li><li><a href=\"/ja/docs/Glossary/HTTP_Content\">HTTP Content (HTTP コンテンツ)</a></li><li><a href=\"/ja/docs/Glossary/HTTP_header\">HTTP header (HTTP ヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/HTTP_2\">HTTP/2</a></li><li><a href=\"/ja/docs/Glossary/HTTP_3\">HTTP/3</a></li><li><a href=\"/ja/docs/Glossary/HTTPS\">HTTPS</a></li><li><a href=\"/ja/docs/Glossary/HTTPS_RR\">HTTPS RR</a></li><li><a href=\"/ja/docs/Glossary/Hyperlink\">Hyperlink (ハイパーリンク)</a></li><li><a href=\"/ja/docs/Glossary/Hypertext\">Hypertext (ハイパーテキスト)</a></li><li><a href=\"/ja/docs/Glossary/IANA\">IANA</a></li><li><a href=\"/ja/docs/Glossary/ICANN\">ICANN</a></li><li><a href=\"/ja/docs/Glossary/ICE\">ICE</a></li><li><a href=\"/ja/docs/Glossary/IDE\">IDE (統合開発環境)</a></li><li><a href=\"/ja/docs/Glossary/Idempotent\">Idempotent (べき等)</a></li><li><a href=\"/ja/docs/Glossary/Identifier\">Identifier (識別子)</a></li><li><a href=\"/ja/docs/Glossary/Identity_provider\">Identity provider (IdP)</a></li><li><a href=\"/ja/docs/Glossary/IDL\">IDL (インターフェイス記述言語)</a></li><li><a href=\"/ja/docs/Glossary/IETF\">IETF</a></li><li><a href=\"/ja/docs/Glossary/IIFE\">IIFE (即時実行関数式)</a></li><li><a href=\"/ja/docs/Glossary/IMAP\">IMAP</a></li><li><a href=\"/ja/docs/Glossary/Immutable\">Immutable (不変)</a></li><li><a href=\"/ja/docs/Glossary/IndexedDB\">IndexedDB</a></li><li><a href=\"/ja/docs/Glossary/Information_architecture\">Information architecture (情報アーキテクチャ)</a></li><li><a href=\"/ja/docs/Glossary/Inheritance\">Inheritance (継承)</a></li><li><a href=\"/ja/docs/Glossary/Ink_overflow\">Ink overflow (インクオーバーフロー)</a></li><li><a href=\"/ja/docs/Glossary/Inline-level_content\">Inline-level content (インラインレベルコンテンツ)</a></li><li><a href=\"/ja/docs/Glossary/Input_method_editor\">Input method editor (インプットメソッドエディター)</a></li><li><a href=\"/ja/docs/Glossary/Inset_properties\">Inset properties (インセットプロパティ)</a></li><li><a href=\"/ja/docs/Glossary/Instance\">Instance (インスタンス)</a></li><li><a href=\"/ja/docs/Glossary/Interaction_to_next_paint\">Interaction to Next Paint (INP)</a></li><li><a href=\"/ja/docs/Glossary/Internationalization\">Internationalization (i18n) （国際化対応）</a></li><li><a href=\"/ja/docs/Glossary/Internet\">Internet (インターネット)</a></li><li><a href=\"/ja/docs/Glossary/Interpolation\">Interpolation (補間)</a></li><li><a href=\"/ja/docs/Glossary/Intrinsic_Size\">Intrinsic size (内在サイズ)</a></li><li><a href=\"/ja/docs/Glossary/IP_Address\">IP Address (IPアドレス)</a></li><li><a href=\"/ja/docs/Glossary/IPv4\">IPv4</a></li><li><a href=\"/ja/docs/Glossary/IPv6\">IPv6</a></li><li><a href=\"/ja/docs/Glossary/IRC\">IRC</a></li><li><a href=\"/ja/docs/Glossary/ISO\">ISO (国際標準化機構)</a></li><li><a href=\"/ja/docs/Glossary/ISP\">ISP</a></li><li><a href=\"/ja/docs/Glossary/ITU\">ITU (国際電気通信連合)</a></li><li><a href=\"/ja/docs/Glossary/Jank\">Jank (ジャンク)</a></li><li><a href=\"/ja/docs/Glossary/Java\">Java</a></li><li><a href=\"/ja/docs/Glossary/JavaScript\">JavaScript</a></li><li><a href=\"/ja/docs/Glossary/Jitter\">Jitter</a></li><li><a href=\"/ja/docs/Glossary/JPEG\">JPEG</a></li><li><a href=\"/ja/docs/Glossary/JSON\">JSON</a></li><li><a href=\"/ja/docs/Glossary/JSON_type_representation\">JSON type representation</a></li><li><a href=\"/ja/docs/Glossary/Kebab_case\">Kebab case (ケバブケース)</a></li><li><a href=\"/ja/docs/Glossary/Key\">Key (暗号鍵)</a></li><li><a href=\"/ja/docs/Glossary/Keyword\">Keyword (キーワード)</a></li><li><a href=\"/ja/docs/Glossary/Largest_contentful_paint\">Largest contentful paint</a></li><li><a href=\"/ja/docs/Glossary/Latency\">Latency(レイテンシー)</a></li><li><a href=\"/ja/docs/Glossary/Layout_viewport\">Layout viewport</a></li><li><a href=\"/ja/docs/Glossary/Lazy_load\">Lazy load (遅延読み込み)</a></li><li><a href=\"/ja/docs/Glossary/LGPL\">LGPL</a></li><li><a href=\"/ja/docs/Glossary/Ligature\">Ligature (合字)</a></li><li><a href=\"/ja/docs/Glossary/Literal\">Literal (リテラル)</a></li><li><a href=\"/ja/docs/Glossary/Local_scope\">Local scope (ローカルスコープ)</a></li><li><a href=\"/ja/docs/Glossary/Local_variable\">Local variable (ローカル変数)</a></li><li><a href=\"/ja/docs/Glossary/Locale\">Locale (ロケール)</a></li><li><a href=\"/ja/docs/Glossary/Localization\">Localization (ローカライゼーション)</a></li><li><a href=\"/ja/docs/Glossary/Logical_properties\">Logical properties</a></li><li><a href=\"/ja/docs/Glossary/Long_task\">Long task (ロングタスク)</a></li><li><a href=\"/ja/docs/Glossary/Loop\">Loop (ループ)</a></li><li><a href=\"/ja/docs/Glossary/Lossless_compression\">Lossless compression (可逆圧縮)</a></li><li><a href=\"/ja/docs/Glossary/Lossy_compression\">Lossy compression (非可逆圧縮)</a></li><li><a href=\"/ja/docs/Glossary/LTR\">LTR (左書き)</a></li><li><a href=\"/ja/docs/Glossary/Main_Axis\">Main Axis (主軸)</a></li><li><a href=\"/ja/docs/Glossary/Main_thread\">Main thread (メインスレッド)</a></li><li><a href=\"/ja/docs/Glossary/Markup\">markup (マークアップ)</a></li><li><a href=\"/ja/docs/Glossary/MathML\">MathML</a></li><li><a href=\"/ja/docs/Glossary/Media\">Media (メディア)</a></li><li><a href=\"/ja/docs/Glossary/Media_query\">Media query (メディアクエリー)</a></li><li><a href=\"/ja/docs/Glossary/Metadata\">Metadata (メタデータ)</a></li><li><a href=\"/ja/docs/Glossary/Method\">Method (メソッド)</a></li><li><a href=\"/ja/docs/Glossary/Microsoft_Edge\">Microsoft Edge</a></li><li><a href=\"/ja/docs/Glossary/Microsoft_Internet_Explorer\">Microsoft Internet Explorer</a></li><li><a href=\"/ja/docs/Glossary/Middleware\">Middleware (ミドルウェア)</a></li><li><a href=\"/ja/docs/Glossary/MIME\">mime</a></li><li><a href=\"/ja/docs/Glossary/MIME_type\">MIME type (MIMEタイプ)</a></li><li><a href=\"/ja/docs/Glossary/Minification\">minification</a></li><li><a href=\"/ja/docs/Glossary/MitM\">MitM (中間者攻撃)</a></li><li><a href=\"/ja/docs/Glossary/Mixin\">Mixin (ミックスイン)</a></li><li><a href=\"/ja/docs/Glossary/Mobile_First\">Mobile First (モバイルファースト)</a></li><li><a href=\"/ja/docs/Glossary/Modem\">Modem (モデム)</a></li><li><a href=\"/ja/docs/Glossary/Modularity\">Modularity (モジュール性)</a></li><li><a href=\"/ja/docs/Glossary/Mozilla_Firefox\">Mozilla Firefox</a></li><li><a href=\"/ja/docs/Glossary/Mutable\">Mutable (ミュータブル)</a></li><li><a href=\"/ja/docs/Glossary/MVC\">MVC</a></li><li><a href=\"/ja/docs/Glossary/Namespace\">Namespace (名前空間)</a></li><li><a href=\"/ja/docs/Glossary/NaN\">NaN (非数)</a></li><li><a href=\"/ja/docs/Glossary/NAT\">NAT</a></li><li><a href=\"/ja/docs/Glossary/Native\">Native (ネイティブ)</a></li><li><a href=\"/ja/docs/Glossary/Navigation_directive\">Navigation directive (ナビゲーションディレクティブ)</a></li><li><a href=\"/ja/docs/Glossary/Netscape_Navigator\">Netscape Navigator</a></li><li><a href=\"/ja/docs/Glossary/Network_throttling\">Network throttling (ネットワークスロットリング)</a></li><li><a href=\"/ja/docs/Glossary/NNTP\">NNTP</a></li><li><a href=\"/ja/docs/Glossary/Node\">Node</a></li><li><a href=\"/ja/docs/Glossary/Node.js\">Node.js</a></li><li><a href=\"/ja/docs/Glossary/Non-normative\">non-normative</a></li><li><a href=\"/ja/docs/Glossary/Normative\">Normative</a></li><li><a href=\"/ja/docs/Glossary/Null\">Null</a></li><li><a href=\"/ja/docs/Glossary/Nullish\">Nullish value</a></li><li><a href=\"/ja/docs/Glossary/Number\">Number</a></li><li><a href=\"/ja/docs/Glossary/Object\">Object (オブジェクト)</a></li><li><a href=\"/ja/docs/Glossary/Object_reference\">Object reference (オブジェクト参照)</a></li><li><a href=\"/ja/docs/Glossary/OOP\">OOP (オブジェクト指向プログラミング)</a></li><li><a href=\"/ja/docs/Glossary/OpenGL\">OpenGL</a></li><li><a href=\"/ja/docs/Glossary/OpenSSL\">OpenSSL</a></li><li><a href=\"/ja/docs/Glossary/Opera_Browser\">Opera Browser</a></li><li><a href=\"/ja/docs/Glossary/Operand\">Operand (オペランド)</a></li><li><a href=\"/ja/docs/Glossary/Operator\">Operator (演算子)</a></li><li><a href=\"/ja/docs/Glossary/Origin\">Origin (オリジン)</a></li><li><a href=\"/ja/docs/Glossary/OTA\">OTA</a></li><li><a href=\"/ja/docs/Glossary/OWASP\">OWASP</a></li><li><a href=\"/ja/docs/Glossary/P2P\">P2P (ピアーツーピアー)</a></li><li><a href=\"/ja/docs/Glossary/PAC\">PAC</a></li><li><a href=\"/ja/docs/Glossary/Packet\">Packet (パケット)</a></li><li><a href=\"/ja/docs/Glossary/Page_load_time\">Page load time (ページ読み込み時間)</a></li><li><a href=\"/ja/docs/Glossary/Page_prediction\">Page prediction</a></li><li><a href=\"/ja/docs/Glossary/Parameter\">Parameter (仮引数)</a></li><li><a href=\"/ja/docs/Glossary/Parent_object\">Parent object (親オブジェクト)</a></li><li><a href=\"/ja/docs/Glossary/Parse\">Parse (構文解析)</a></li><li><a href=\"/ja/docs/Glossary/Parser\">Parser (パーサー)</a></li><li><a href=\"/ja/docs/Glossary/Payload_body\">Payload body</a></li><li><a href=\"/ja/docs/Glossary/Payload_header\">Payload header (ペイロードヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/PDF\">PDF</a></li><li><a href=\"/ja/docs/Glossary/Perceived_performance\">Perceived performance (知覚的パフォーマンス)</a></li><li><a href=\"/ja/docs/Glossary/Percent-encoding\">Percent-encoding (パーセントエンコーディング)</a></li><li><a href=\"/ja/docs/Glossary/PHP\">PHP</a></li><li><a href=\"/ja/docs/Glossary/Physical_properties\">Physical properties (物理プロパティ)</a></li><li><a href=\"/ja/docs/Glossary/Pixel\">Pixel (ピクセル)</a></li><li><a href=\"/ja/docs/Glossary/Placeholder_names\">Placeholder names</a></li><li><a href=\"/ja/docs/Glossary/Plaintext\">Plaintext (平文)</a></li><li><a href=\"/ja/docs/Glossary/Plugin\">Plugin (プラグイン)</a></li><li><a href=\"/ja/docs/Glossary/PNG\">PNG</a></li><li><a href=\"/ja/docs/Glossary/Polyfill\">Polyfill (ポリフィル)</a></li><li><a href=\"/ja/docs/Glossary/Polymorphism\">Polymorphism (多態性)</a></li><li><a href=\"/ja/docs/Glossary/POP\">POP3</a></li><li><a href=\"/ja/docs/Glossary/Port\">Port (ポート)</a></li><li><a href=\"/ja/docs/Glossary/Prefetch\">Prefetch (先読み)</a></li><li><a href=\"/ja/docs/Glossary/Preflight_request\">Preflight request (プリフライトリクエスト)</a></li><li><a href=\"/ja/docs/Glossary/Prerender\">Prerender</a></li><li><a href=\"/ja/docs/Glossary/Presto\">Presto</a></li><li><a href=\"/ja/docs/Glossary/Primitive\">Primitive (プリミティブ)</a></li><li><a href=\"/ja/docs/Glossary/Privileged\">Privileged</a></li><li><a href=\"/ja/docs/Glossary/Privileged_code\">Privileged code (特権コード)</a></li><li><a href=\"/ja/docs/Glossary/Progressive_Enhancement\">Progressive Enhancement (プログレッシブエンハンスメント)</a></li><li><a href=\"/ja/docs/Glossary/Progressive_web_apps\">Progressive web apps (プログレッシブウェブアプリ)</a></li><li><a href=\"/ja/docs/Glossary/Promise\">Promise (プロミス)</a></li><li><a href=\"/ja/docs/Glossary/Property\">Property (プロパティ)</a></li><li><a href=\"/ja/docs/Glossary/Protocol\">Protocol (プロトコル)</a></li><li><a href=\"/ja/docs/Glossary/Prototype\">Prototype</a></li><li><a href=\"/ja/docs/Glossary/Prototype-based_programming\">Prototype-based programming (プロトタイプベースプログラミング)</a></li><li><a href=\"/ja/docs/Glossary/Proxy_server\">Proxy server (プロキシーサーバー)</a></li><li><a href=\"/ja/docs/Glossary/Pseudo-class\">Pseudo-class</a></li><li><a href=\"/ja/docs/Glossary/Pseudo-element\">Pseudo-element (擬似要素)</a></li><li><a href=\"/ja/docs/Glossary/Pseudocode\">Pseudocode (擬似コード)</a></li><li><a href=\"/ja/docs/Glossary/Public-key_cryptography\">Public-key cryptography (公開鍵暗号)</a></li><li><a href=\"/ja/docs/Glossary/Python\">Python</a></li><li><a href=\"/ja/docs/Glossary/Quality_values\">Quality values (品質値)</a></li><li><a href=\"/ja/docs/Glossary/Quaternion\">Quaternion (四元数)</a></li><li><a href=\"/ja/docs/Glossary/QUIC\">QUIC</a></li><li><a href=\"/ja/docs/Glossary/RAIL\">RAIL</a></li><li><a href=\"/ja/docs/Glossary/RNG\">Random Number Generator (乱数発生器)</a></li><li><a href=\"/ja/docs/Glossary/Raster_image\">ラスターイメージ (Raster Image)</a></li><li><a href=\"/ja/docs/Glossary/Rate_limit\">Rate limit (レート制限)</a></li><li><a href=\"/ja/docs/Glossary/RDF\">RDF</a></li><li><a href=\"/ja/docs/Glossary/Real_User_Monitoring\">Real User Monitoring（RUM）</a></li><li><a href=\"/ja/docs/Glossary/Recursion\">Recursion (再帰)</a></li><li><a href=\"/ja/docs/Glossary/Reflow\">Reflow (再フロー)</a></li><li><a href=\"/ja/docs/Glossary/Regular_expression\">Regular expression (正規表現)</a></li><li><a href=\"/ja/docs/Glossary/Relying_party\">Relying party</a></li><li><a href=\"/ja/docs/Glossary/Render_blocking\">Render-blocking (レンダーブロッキング)</a></li><li><a href=\"/ja/docs/Glossary/Repaint\">Repaint (再描画)</a></li><li><a href=\"/ja/docs/Glossary/Replay_attack\">Replay attack</a></li><li><a href=\"/ja/docs/Glossary/Repo\">Repo (リポジトリー)</a></li><li><a href=\"/ja/docs/Glossary/Reporting_directive\">Reporting directive (報告ディレクティブ)</a></li><li><a href=\"/ja/docs/Glossary/Representation_header\">Representation header (表現ヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Request_header\">Request header (リクエストヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Resource_Timing\">Resource Timing</a></li><li><a href=\"/ja/docs/Glossary/Response_header\">Response header (レスポンスヘッダー)</a></li><li><a href=\"/ja/docs/Glossary/Responsive_web_design\">Responsive web design (レスポンシブウェブデザイン)</a></li><li><a href=\"/ja/docs/Glossary/REST\">REST</a></li><li><a href=\"/ja/docs/Glossary/RGB\">RGB</a></li><li><a href=\"/ja/docs/Glossary/RIL\">RIL</a></li><li><a href=\"/ja/docs/Glossary/Robots.txt\">Robots.txt</a></li><li><a href=\"/ja/docs/Glossary/Round_Trip_Time\">Round Trip Time (ラウンドトリップタイム)</a></li><li><a href=\"/ja/docs/Glossary/Router\">Router (ルーター)</a></li><li><a href=\"/ja/docs/Glossary/RSS\">RSS</a></li><li><a href=\"/ja/docs/Glossary/Rsync\">Rsync</a></li><li><a href=\"/ja/docs/Glossary/RTCP\">RTCP (RTP Control Protocol)</a></li><li><a href=\"/ja/docs/Glossary/RTF\">RTF</a></li><li><a href=\"/ja/docs/Glossary/RTL\">RTL (右書き)</a></li><li><a href=\"/ja/docs/Glossary/RTP\">RTP (Real-time Transport Protocol) and SRTP (Secure RTP)</a></li><li><a href=\"/ja/docs/Glossary/RTSP\">RTSP: Real-time streaming protocol</a></li><li><a href=\"/ja/docs/Glossary/Ruby\">Ruby</a></li><li><a href=\"/ja/docs/Glossary/Safe\">Safe (安全)</a></li><li><a href=\"/ja/docs/Glossary/Salt\">Salt</a></li><li><a href=\"/ja/docs/Glossary/Same-origin_policy\">Same-origin policy (同一オリジンポリシー)</a></li><li><a href=\"/ja/docs/Glossary/SCM\">SCM</a></li><li><a href=\"/ja/docs/Glossary/Scope\">Scope (スコープ)</a></li><li><a href=\"/ja/docs/Glossary/Screen_reader\">Screen reader (スクリーンリーダー)</a></li><li><a href=\"/ja/docs/Glossary/Script-supporting_element\">Script-supporting element (スクリプト対応要素)</a></li><li><a href=\"/ja/docs/Glossary/Scroll_boundary\">Scroll boundary （スクロール境界）</a></li><li><a href=\"/ja/docs/Glossary/Scroll_chaining\">Scroll chaining （スクロール連鎖）</a></li><li><a href=\"/ja/docs/Glossary/Scroll_container\">Scroll container (スクロールコンテナー)</a></li><li><a href=\"/ja/docs/Glossary/Scroll_snap\">Scroll snap</a></li><li><a href=\"/ja/docs/Glossary/SCTP\">SCTP</a></li><li><a href=\"/ja/docs/Glossary/SDK\">SDK (Software Development Kit)</a></li><li><a href=\"/ja/docs/Glossary/SDP\">SDP</a></li><li><a href=\"/ja/docs/Glossary/Search_engine\">Search engine (検索エンジン)</a></li><li><a href=\"/ja/docs/Glossary/Secure_Context\">Secure Context (安全なコンテキスト)</a></li><li><a href=\"/ja/docs/Glossary/SSL\">SSL</a></li><li><a href=\"/ja/docs/Glossary/CSS_Selector\">Selector (セレクター) (CSS)</a></li><li><a href=\"/ja/docs/Glossary/Self-Executing_Anonymous_Function\">Self-Executing Anonymous Function (自己実行無名関数)</a></li><li><a href=\"/ja/docs/Glossary/Semantics\">Semantics (セマンティクス)</a></li><li><a href=\"/ja/docs/Glossary/SEO\">SEO</a></li><li><a href=\"/ja/docs/Glossary/Serializable_object\">Serializable object （シリアライズ可能オブジェクト）</a></li><li><a href=\"/ja/docs/Glossary/Serialization\">Serialization (シリアライズ)</a></li><li><a href=\"/ja/docs/Glossary/Server\">Server (サーバー)</a></li><li><a href=\"/ja/docs/Glossary/Server_Timing\">Server Timing</a></li><li><a href=\"/ja/docs/Glossary/Session_Hijacking\">Session Hijacking</a></li><li><a href=\"/ja/docs/Glossary/SGML\">SGML</a></li><li><a href=\"/ja/docs/Glossary/Shadow_tree\">Shadow tree (シャドウツリー)</a></li><li><a href=\"/ja/docs/Glossary/Shallow_copy\">Shallow copy (シャローコピー)</a></li><li><a href=\"/ja/docs/Glossary/Shim\">Shim (シム)</a></li><li><a href=\"/ja/docs/Glossary/Signature\">Signature (シグネチャ)</a></li><li><a href=\"/ja/docs/Glossary/SIMD\">SIMD</a></li><li><a href=\"/ja/docs/Glossary/SISD\">SISD</a></li><li><a href=\"/ja/docs/Glossary/Site\">Site (サイト)</a></li><li><a href=\"/ja/docs/Glossary/Site_map\">Site map (サイトマップ)</a></li><li><a href=\"/ja/docs/Glossary/SLD\">SLD</a></li><li><a href=\"/ja/docs/Glossary/Sloppy_mode\">Sloppy モード</a></li><li><a href=\"/ja/docs/Glossary/Slug\">Slug (スラグ)</a></li><li><a href=\"/ja/docs/Glossary/Smoke_Test\">Smoke Test (スモークテスト)</a></li><li><a href=\"/ja/docs/Glossary/SMPTE\">SMPTE (Society of Motion Picture and Television Engineers)</a></li><li><a href=\"/ja/docs/Glossary/SMTP\">SMTP</a></li><li><a href=\"/ja/docs/Glossary/Snake_case\">Snake case (スネークケース)</a></li><li><a href=\"/ja/docs/Glossary/Snap_positions\">Snap positions</a></li><li><a href=\"/ja/docs/Glossary/SOAP\">SOAP</a></li><li><a href=\"/ja/docs/Glossary/SPA\">SPA (単一ページアプリケーション)</a></li><li><a href=\"/ja/docs/Glossary/Specification\">Specification</a></li><li><a href=\"/ja/docs/Glossary/Speculative_parsing\">Speculative parsing (投機的解析)</a></li><li><a href=\"/ja/docs/Glossary/Speed_index\">Speed index (スピードインデックス)</a></li><li><a href=\"/ja/docs/Glossary/SQL\">SQL</a></li><li><a href=\"/ja/docs/Glossary/SQL_Injection\">SQL Injection (SQL インジェクション)</a></li><li><a href=\"/ja/docs/Glossary/SRI\">SRI</a></li><li><a href=\"/ja/docs/Glossary/Stacking_context\">Stacking context (重ね合わせコンテキスト)</a></li><li><a href=\"/ja/docs/Glossary/State_machine\">State machine</a></li><li><a href=\"/ja/docs/Glossary/Statement\">Statement (文)</a></li><li><a href=\"/ja/docs/Glossary/Static_method\">Static method (静的メソッド)</a></li><li><a href=\"/ja/docs/Glossary/SSG\">Static site generator (SSG)</a></li><li><a href=\"/ja/docs/Glossary/Static_typing\">Static typing (静的型付け)</a></li><li><a href=\"/ja/docs/Glossary/Sticky_activation\">Sticky activation (粘着的な有効化)</a></li><li><a href=\"/ja/docs/Glossary/Strict_mode\">Strict mode (厳格モード)</a></li><li><a href=\"/ja/docs/Glossary/String\">String (文字列)</a></li><li><a href=\"/ja/docs/Glossary/Stringifier\">Stringifier (文字列化子)</a></li><li><a href=\"/ja/docs/Glossary/STUN\">STUN</a></li><li><a href=\"/ja/docs/Glossary/Style_origin\">Style origin (スタイルオリジン)</a></li><li><a href=\"/ja/docs/Glossary/Stylesheet\">Stylesheet (スタイルシート)</a></li><li><a href=\"/ja/docs/Glossary/Submit_button\">Submit button (送信ボタン)</a></li><li><a href=\"/ja/docs/Glossary/SVG\">SVG</a></li><li><a href=\"/ja/docs/Glossary/SVN\">SVN</a></li><li><a href=\"/ja/docs/Glossary/Symbol\">Symbol</a></li><li><a href=\"/ja/docs/Glossary/Symmetric-key_cryptography\">Symmetric-key cryptography (共通鍵暗号)</a></li><li><a href=\"/ja/docs/Glossary/Synchronous\">Synchronous (同期通信方式)</a></li><li><a href=\"/ja/docs/Glossary/Syntax\">Syntax (構文)</a></li><li><a href=\"/ja/docs/Glossary/Syntax_error\">Syntax error (構文エラー)</a></li><li><a href=\"/ja/docs/Glossary/Synthetic_monitoring\">Synthetic monitoring (合成モニタリング)</a></li><li><a href=\"/ja/docs/Glossary/Table_Grid_Box\">Table Grid Box (表グリッドボックス)</a></li><li><a href=\"/ja/docs/Glossary/Table_Wrapper_Box\">Table Wrapper Box (表ラッパーボックス)</a></li><li><a href=\"/ja/docs/Glossary/Tag\">Tag (タグ)</a></li><li><a href=\"/ja/docs/Glossary/TCP\">TCP</a></li><li><a href=\"/ja/docs/Glossary/TCP_handshake\">TCP handshake (TCP ハンドシェイク)</a></li><li><a href=\"/ja/docs/Glossary/TCP_slow_start\">TCP slow start</a></li><li><a href=\"/ja/docs/Glossary/Telnet\">Telnet</a></li><li><a href=\"/ja/docs/Glossary/Texel\">Texel (テクセル)</a></li><li><a href=\"/ja/docs/Glossary/Khronos\">The Khronos Group (クロノス・グループ)</a></li><li><a href=\"/ja/docs/Glossary/Thread\">Thread (スレッド)</a></li><li><a href=\"/ja/docs/Glossary/Three_js\">Three js</a></li><li><a href=\"/ja/docs/Glossary/Throttle\">Throttle (スロットル)</a></li><li><a href=\"/ja/docs/Glossary/Time_to_first_byte\">Time to first byte （最初のバイトまでの時間）</a></li><li><a href=\"/ja/docs/Glossary/Time_to_interactive\">Time to interactive (対話までの時間)</a></li><li><a href=\"/ja/docs/Glossary/TLD\">TLD (トップレベルドメイン)</a></li><li><a href=\"/ja/docs/Glossary/TOFU\">TOFU</a></li><li><a href=\"/ja/docs/Glossary/Top_layer\">Top layer (最上位レイヤー)</a></li><li><a href=\"/ja/docs/Glossary/Transient_activation\">Transient activation (一時的な有効化)</a></li><li><a href=\"/ja/docs/Glossary/TLS\">Transport Layer Security (TLS)</a></li><li><a href=\"/ja/docs/Glossary/Tree_shaking\">Tree shaking</a></li><li><a href=\"/ja/docs/Glossary/Trident\">Trident</a></li><li><a href=\"/ja/docs/Glossary/Truthy\">Truthy (真値)</a></li><li><a href=\"/ja/docs/Glossary/TTL\">TTL</a></li><li><a href=\"/ja/docs/Glossary/TURN\">TURN</a></li><li><a href=\"/ja/docs/Glossary/Type\">Type (型)</a></li><li><a href=\"/ja/docs/Glossary/Type_coercion\">Type coercion (型強制)</a></li><li><a href=\"/ja/docs/Glossary/Type_Conversion\">Type conversion (型変換)</a></li><li><a href=\"/ja/docs/Glossary/TypeScript\">TypeScript</a></li><li><a href=\"/ja/docs/Glossary/UAAG\">UAAG</a></li><li><a href=\"/ja/docs/Glossary/UDP\">UDP (User Datagram Protocol)</a></li><li><a href=\"/ja/docs/Glossary/UI\">UI</a></li><li><a href=\"/ja/docs/Glossary/Undefined\">undefined</a></li><li><em><a href=\"/ja/docs/Glossary/Unicode\" aria-current=\"page\">Unicode</a></em></li><li><a href=\"/ja/docs/Glossary/Unix_time\">Unix time (UNIX 時間)</a></li><li><a href=\"/ja/docs/Glossary/URI\">URI</a></li><li><a href=\"/ja/docs/Glossary/URL\">URL</a></li><li><a href=\"/ja/docs/Glossary/URN\">URN</a></li><li><a href=\"/ja/docs/Glossary/Usenet\">Usenet</a></li><li><a href=\"/ja/docs/Glossary/User_agent\">User agent (ユーザーエージェント)</a></li><li><a href=\"/ja/docs/Glossary/UTF-8\">UTF-8</a></li><li><a href=\"/ja/docs/Glossary/UUID\">UUID</a></li><li><a href=\"/ja/docs/Glossary/UX\">UX</a></li><li><a href=\"/ja/docs/Glossary/Validator\">Validator (バリデーター)</a></li><li><a href=\"/ja/docs/Glossary/Value\">Value (値)</a></li><li><a href=\"/ja/docs/Glossary/Variable\">Variable (変数)</a></li><li><a href=\"/ja/docs/Glossary/Vendor_Prefix\">Vendor Prefix (ベンダー接頭辞)</a></li><li><a href=\"/ja/docs/Glossary/Viewport\">Viewport (ビューポート)</a></li><li><a href=\"/ja/docs/Glossary/Visual_Viewport\">Visual Viewport (視覚的ビューポート)</a></li><li><a href=\"/ja/docs/Glossary/Void_element\">Void element （空要素）</a></li><li><a href=\"/ja/docs/Glossary/VoIP\">VoIP</a></li><li><a href=\"/ja/docs/Glossary/W3C\">W3C</a></li><li><a href=\"/ja/docs/Glossary/WAI\">WAI</a></li><li><a href=\"/ja/docs/Glossary/WCAG\">WCAG</a></li><li><a href=\"/ja/docs/Glossary/Web_performance\">Web performance (ウェブの性能)</a></li><li><a href=\"/ja/docs/Glossary/Web_server\">Web server (ウェブサーバー)</a></li><li><a href=\"/ja/docs/Glossary/Web_standards\">Web standards (ウェブ標準)</a></li><li><a href=\"/ja/docs/Glossary/WebAssembly\">WebAssembly</a></li><li><a href=\"/ja/docs/Glossary/WebDAV\">WebDAV</a></li><li><a href=\"/ja/docs/Glossary/WebExtensions\">WebExtensions</a></li><li><a href=\"/ja/docs/Glossary/WebGL\">WebGL</a></li><li><a href=\"/ja/docs/Glossary/WebIDL\">WebIDL</a></li><li><a href=\"/ja/docs/Glossary/WebKit\">WebKit</a></li><li><a href=\"/ja/docs/Glossary/WebM\">WebM</a></li><li><a href=\"/ja/docs/Glossary/WebP\">WebP</a></li><li><a href=\"/ja/docs/Glossary/WebRTC\">WebRTC</a></li><li><a href=\"/ja/docs/Glossary/WebSockets\">WebSockets</a></li><li><a href=\"/ja/docs/Glossary/WebVTT\">WebVTT</a></li><li><a href=\"/ja/docs/Glossary/WHATWG\">WHATWG</a></li><li><a href=\"/ja/docs/Glossary/Whitespace\">Whitespace (ホワイトスペース)</a></li><li><a href=\"/ja/docs/Glossary/WindowProxy\">WindowProxy</a></li><li><a href=\"/ja/docs/Glossary/World_Wide_Web\">World Wide Web</a></li><li><a href=\"/ja/docs/Glossary/Wrapper\">Wrapper (ラッパー)</a></li><li><a href=\"/ja/docs/Glossary/XForms\">XForms</a><abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">非推奨</span>\n</abbr></li><li><a href=\"/ja/docs/Glossary/XHTML\">XHTML</a></li><li><a href=\"/ja/docs/Glossary/XInclude\">XInclude</a></li><li><a href=\"/ja/docs/Glossary/XLink\">XLink</a></li><li><a href=\"/ja/docs/Glossary/XML\">XML</a></li><li><a href=\"/ja/docs/Glossary/XMLHttpRequest\">XHR (XMLHttpRequest)</a></li><li><a href=\"/ja/docs/Glossary/XPath\">XPath</a></li><li><a href=\"/ja/docs/Glossary/XQuery\">XQuery</a></li><li><a href=\"/ja/docs/Glossary/XSLT\">XSLT</a></li><li><a href=\"/ja/docs/Glossary/Zstandard_compression\">Zstandard compression</a></li></ol>\n </li>\n </ol>\n","sidebarMacro":"GlossarySidebar","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p>Unicode とは、世界の様々な言語、書式、記号に、番号を割り当てて定義した標準の<a href=\"/ja/docs/Glossary/Character_set\">文字コード</a> です。一つ一つの<a href=\"/ja/docs/Glossary/Character\">文字</a> に番号を割り当てることで、プログラマーは、どの言語が混ざっていても、コンピューターに保存、処理、伝送させるような<a href=\"/ja/docs/Glossary/Character_encoding\">文字エンコーディング</a>を同じファイルやプログラムの中に作ることができます。</p>\n<p>Unicode ができる以前は、同じデータのなかに異なる言語を入れることは難しく、誤りが起こりがちでした。例えば、ある文字コードは日本語の文字を格納するためのもので、別のある文字コードはアラビア文字を格納するためのものだとします。もしデータのどの部分がどの文字コードであるか明確に示していない場合、他のプログラムやコンピューターは、文章を誤って表示してしまったり、処理中にデータを破損してしまったりしていました。二重引用符 (<code>“”</code>)のような文字が <code>Ã‚Â£</code> のようなわけのわからないものに置き換わっているのを見たことがあるかもしれません。それがこの問題です。<a href=\"https://ja.wikipedia.org/wiki/%E6%96%87%E5%AD%97%E5%8C%96%E3%81%91\" class=\"external\" target=\"_blank\">文字化け</a>として知られています。</p>\n<p>ウェブ上でもっとも一般的な文字エンコーディングは <a href=\"/ja/docs/Glossary/UTF-8\">UTF-8</a> です。UTF-16 や廃止された UCS-2 といったエンコーディングも存在しますが、UTF-8 が推奨されています。</p>"}},{"type":"prose","value":{"id":"関連項目","title":"関連項目","isH3":false,"content":"<ul>\n <li>Wikipedia の <a href=\"https://ja.wikipedia.org/wiki/Unicode\" class=\"external\" target=\"_blank\">Unicode</a></li>\n <li><a href=\"https://www.unicode.org/standard/principles.html\" class=\"external\" target=\"_blank\">The Unicode Standard: A Technical Introduction</a></li>\n</ul>"}}],"toc":[{"text":"関連項目","id":"関連項目"}],"summary":"Unicode とは、世界の様々な言語、書式、記号に、番号を割り当てて定義した標準の文字コードです。一つ一つの文字に番号を割り当てることで、プログラマーは、どの言語が混ざっていても、コンピューターに保存、処理、伝送させるような文字エンコーディングを同じファイルやプログラムの中に作ることができます。","popularity":0,"modified":"2023-11-20T14:52:10.000Z","other_translations":[{"locale":"de","title":"Unicode","native":"Deutsch"},{"locale":"en-US","title":"Unicode","native":"English (US)"},{"locale":"es","title":"Unicode","native":"Español"},{"locale":"fr","title":"Unicode","native":"Français"},{"locale":"ko","title":"유니코드","native":"한국어"},{"locale":"zh-CN","title":"Unicode","native":"中文 (简体)"}],"pageType":"unknown","source":{"folder":"ja/glossary/unicode","github_url":"https://github.com/mdn/translated-content/blob/main/files/ja/glossary/unicode/index.md","last_commit_url":"https://github.com/mdn/translated-content/commit/883b71395cb94d66d8cd57490664d46af3a6272e","filename":"index.md"},"short_title":"Unicode","parents":[{"uri":"/ja/docs/Glossary","title":"MDN Web Docs 用語集"},{"uri":"/ja/docs/Glossary/Unicode","title":"Unicode"}],"pageTitle":"Unicode - MDN Web Docs 用語集: ウェブ関連用語の定義 | MDN","noIndexing":false}}</script></body></html>