GitHub - tc39/proposal-signals: A proposal to add signals to JavaScript.
Stage 1 (explanation) TC39 proposal champions: Daniel Ehrenberg, Yehuda Katz, Jatin Ramanathan, Shay Lewis, Kristen Hewell Garrett, Dominic Gannaway, Preston Sego, Milo M, Rob Eisenberg Original authors: Rob Eisenberg and Daniel Ehrenberg This document describes an early common direction for signals in JavaScript, similar to the Promises/A+ effort which preceded the Promises standardized by TC39 i
ECMAScript proposal: Set methods
In this blog post, we examine the ECMAScript proposal “Set methods for JavaScript†by Michał Wadas, Sathya Gunasekara and Kevin Gibbons. It introduces new methods for Sets. New Set methods that return Sets  # Set.prototype.union(other)  # This method returns a Set that is the union of this and other. Type signature: Set<T>.prototype.union(other: SetReadOperations<T>): Set<T> The type of other, Set
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ç†è€…ã¯æ¬¡ã® 2 ã¤ã® ECMAScript ã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ã«æ³¨ç›®ã—ã¦ã„ã¾ã™ã€‚ Module Expressions Module Declarations ã“ã® 2 ã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ã¯æ§‹æ–‡ã®ã¿ã«æ³¨ç›®ã™ã‚‹ã¨ã‚ˆãä¼¼ã¦ã„ã¾ã™ã€‚ã—ã‹ã—ãã®ãƒ¢ãƒãƒ™ãƒ¼ã‚·ãƒ§ãƒ³ã¯å…¨ãç•°ãªã‚Šã¾ã™ã€‚ ã“ã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ãŒç™»å ´ã—ãŸã®ã¯ 2 å¹´ã»ã©å‰ã§ã™ãŒã€ç¾åœ¨ã§ã‚‚仕様ã®ç–定ãŒé€²ã‚“ã§ã„ã¾ã™ã€‚ã“れらã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ãŒé †èª¿ã«é€²æ—ã— ECMAScript ã«å–ã‚Šè¾¼ã¾ã‚Œã‚‹ã“ã¨ã«å‚™ãˆã¦ã€ãれらã®ãƒ¢ãƒãƒ™ãƒ¼ã‚·ãƒ§ãƒ³ã‚’今ã®ã†ã¡ã«æ•´ç†ã—ã¦ãŠãã¾ã—ょã†ã€‚ ã¾ãš Module Expressions ã‚‚ Module Declarations ã‚‚ã€ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã®ä¸ã§æ–°ã—ã„モジュールを作æˆã™ã‚‹æ§‹æ–‡ã‚’å°Žå…¥ã™ã‚‹ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ã§ã™ï¼ˆåå‰ã‹ã‚‰æƒ³åƒã§ãã‚‹ã¨ãŠã‚Šï¼‰ã€‚ // Module Expressions ã®ä¾‹ const mod1 = module { export co
ECMAScript proposal: iterator helpers
Update 2022-12-15: New section “How will this proposal affect future JavaScript APIs?†In this blog post, we look at the ECMAScript proposal “Iterator helpers†by Gus Caplan, Michael Ficarra, Adam Vandolder, Jason Orendorff, Kevin Gibbons, and Yulia Startsev. It introduces utility methods for working with iterable data: .map(), .filter(), .take(), etc. The style of the proposed API clashes with th
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Records & Tuples ã¨ã„ã†ãã“ãã“有å(?)ãªãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ãŒã‚ã‚Šã¾ã™ãŒã€ãã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ã‹ã‚‰æ´¾ç”Ÿã—㟠JSON.parseImmutable ã¨ã„ã†æ–°ã—ã„プãƒãƒãƒ¼ã‚¶ãƒ«ãŒè‰¯ã•ãã†ãªã®ã§ç´¹ä»‹ã—ã¾ã™ã€‚ Records & Tuples Records & Tuples ã¯ãƒ¬ã‚³ãƒ¼ãƒ‰ã¨ã‚¿ãƒ—ルã¨ã„ã†æ–°ã—ã„ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã‚’å°Žå…¥ã™ã‚‹ç¾åœ¨ Stage 2 ã®ãƒ—ãƒãƒãƒ¼ã‚¶ãƒ«ã§ã™ã€‚ レコードã¨ã‚¿ãƒ—ルã¯ã€ãã‚Œãžã‚Œã‚¤ãƒŸãƒ¥ãƒ¼ã‚¿ãƒ–ルãªã‚ªãƒ–ジェクトã¨é…列ã®ã‚ˆã†ãªã‚‚ã®ã§ã™ã€‚ç¾åœ¨æ案ã•ã‚Œã¦ã„る構文ã§ã¯é€šå¸¸ã®ã‚ªãƒ–ジェクトリテラルやé…列リテラルã®é ã« # ã‚’ã¤ã‘ã‚‹ã¨ã€ãƒ¬ã‚³ãƒ¼ãƒ‰ã¨ã‚¿ãƒ—ルã«ãªã‚Šã¾ã™ã€‚ const record = #{ x: 1, y: 2, }; const tuple = #[1, 2, 3]; レコードやタプルやイミュータブルãªãƒ‡ãƒ¼ã‚¿æ§‹é€ ãªã®ã§å¾Œã‹ã‚‰å†…容を更新ã™ã‚‹ã“ã¨ã¯ã§ãã¾ã›ã‚“。 レコードã¨ã‚¿ãƒ—ルã®å¤§
ECMAScript proposal: `Array.fromAsync()`
This blog post is about the ECMAScript proposal “Array.fromAsync for JavaScriptâ€Â by J. S. Choi. It introduces a static method for converting asynchronous iterables to Arrays. Tools for working with synchronous iterables  # Currently JavaScript provides several tools for working with synchronous iterables – for example: function* createSyncIterable() { yield 'a'; yield 'b'; yield 'c'; } // Array-de
ECMAScript proposal: RegExp flag `/v` makes character classes and character class escapes more powerful
ECMAScript proposal: RegExp flag /v makes character classes and character class escapes more powerful In this blog post, we look at the ECMAScript proposal “RegExp v flag with set notation + properties of strings†by Markus Scherer and Mathias Bynens. The new flag /v  # The proposed new regular expression flag /v (.unicodeSets) enables three features: Support for multi-code-point graphemes (such a
A pipe operator for JavaScript: introduction and use cases
The proposal “Pipe operator (|>) for JavaScript†(by J. S. Choi, James DiGioia, Ron Buckton and Tab Atkins) introduces a new operator. This operator is an idea borrowed from functional programming that makes applying functions more convenient in many cases. This blog post describes how the pipe operator works and what its use cases are (there are more than you might expect!). The two competing pro
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GitHub - tc39/proposal-optional-chaining-assignment: `a?.b = c` proposal
ECMAScript proposal: source text access for `JSON.parse()` and `JSON.stringify()`
GitHub - tc39/proposals: Tracking ECMAScript Proposals
GitHub - tc39/proposal-explicit-resource-management: ECMAScript Explicit Resource Management
ECMAScript proposal: grouping Arrays via `.group()` and `.groupToMap()`
GitHub - tc39/proposal-relative-indexing-method: A TC39 proposal to add an .at() method to all the basic indexable classes (Array, String, TypedArray)
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