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JavaScriptを定義する。 TC39 Ecma InternationalのTC39は、JavaScript開発者、実装者、専門家などのグループで、JavaScriptの仕様をメンテナンスし発展させるためにコミュニティと協力しています。 我々は 所属の委員会です。 コントリビュート 既存のプロポーザルに対するフィードバック、ドキュメントの改善、テスト、実装、さらには言語機能に関するアイデアなど、JavaScriptコミュニティからのコントリビュートをTC39は歓迎します。詳細については、コントリビュータガイドをご覧ください。 TC39のミーティングにメンバーとして参加するには、Ecmaに参加してください。 仕様 我々はJavaScript(正式には、ECMAScript)の仕様をGitHub上で開発し、2ヶ月ごとにミーティングを行い、プロポーザルについて議論しています。このプロセスの

Please visit Temporal documentation on MDN, the main API reference going forward. Or see our cookbook. Temporal Table of Contents Introduction Cookbook API Documentation Temporal.Now Temporal.Instant Temporal.ZonedDateTime Temporal.PlainDate Temporal.PlainTime Temporal.PlainDateTime Temporal.PlainYearMonth Temporal.PlainMonthDay Temporal.Duration Balancing Time Zones Calendars Object relationship

Please visit Temporal documentation on MDN, the main API reference going forward. Or see our cookbook. Temporal CookbookOverview Overview Running the cookbook files Frequently Asked Questions Current date and time Unix timestamp Converting between Temporal types and legacy Date Legacy Date = Temporal.Instant and/or Temporal.ZonedDateTime Date-only values: legacy Date = Temporal.PlainDate Temporal

Specifying JavaScript. TC39 Ecma International's TC39 is a group of JavaScript developers, implementers, academics, and more, collaborating with the community to maintain and evolve the definition of JavaScript. We are part of Contribute TC39 welcomes contributions from the JavaScript community, whether it is feedback on existing proposals, improved documentation, testing, implementations, or even

Stage 4 Draft / January 24, 2018Unicode property escapes in regular expressions The syntax listed in 21.2.1 Patterns is modified as follows. ControlLetter::one ofabcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ CharacterClassEscape[U]::d D s S w W [+U]p{UnicodePropertyValueExpression} [+U]P{UnicodePropertyValueExpression} UnicodePropertyValueExpression::UnicodePropertyName=UnicodePropertyValue

Stage 1 Draft / July 26, 2016Template Literal Revision Introduction# Template literals should allow the embedding of languages (DSLs etc.). But restrictions on escape sequences make this problematic. For example, consider making a latex processor with templates: function latex(strings) { // ... } let document = latex` \newcommand{\fun}{\textbf{Fun!}} // works just fine \newcommand{\unicode}{\textb

Introduction1 Scope2 Conformance3 Normative References◢4 Overview4.1 Web Scripting◢4.2 ECMAScript Overview4.2.1 Objects4.2.2 The Strict Variant of ECMAScript◢4.3 Terms and Definitions4.3.1 type4.3.2 primitive value4.3.3 object4.3.4 constructor4.3.5 prototype4.3.6 ordinary object4.3.7 exotic object4.3.8 standard object4.3.9 built-in object4.3.10 undefined value4.3.11 Undefined type4.3.12 null value

Toggle shortcuts help? Toggle "can call user code" annotationsu Navigate to/from multipagem Jump to search box/ Toggle pinning of the current clausep Jump to the nth pin1-9 Jump to the 10th pin0 Jump to the most recent link target` Introduction1 Scope+2 Conformance2.1 Example Normative Optional Clause Heading2.2 Example Legacy Clause Heading2.3 Example Legacy Normative Optional Clause Heading3 Nor

Stage 3 Draft / January 26, 2016Async Functions Introduction# The introduction of promises and generators in ECMAScript presents an opportunity to dramatically improve the language-level model for writing asynchronous code in ECMAScript. A similar proposal was made with Deferred Functions during ES6 discussions. The proposal here supports the same use cases, using similar or the same syntax, but d

Ecma Technical Committee 39 (TC39) is responsible for evolving the ECMAScript programming language and authoring the specification. The committee operates by consensus and has discretion to alter the specification as it sees fit. However, the general process for making changes to the specification is as follows. Stages Changes to the language are developed by way of a process which provides guidel