--- title: ECMAScript 2026 specification approved | daily.dev description: ECMA International has approved ECMAScript 2026 (ES2026), the 17th edition of the JavaScript specification, on June 30. The new edition introduces several... canonical: https://daily.dev/posts/ecmascript-2026-specification-approved-3orzqhzl9 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: ECMAScript 2026 specification approved | daily.dev og:description: ECMA International has approved ECMAScript 2026 (ES2026), the 17th edition of the JavaScript specification, on June 30. The new edition introduces several... og:url: https://daily.dev/posts/ecmascript-2026-specification-approved-3orzqhzl9 og:image: https://api.daily.dev/og/posts/3ORZQHZl9.png og:image:alt: ECMAScript 2026 specification approved og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # ECMAScript 2026 specification approved **[InfoWorld](https://daily.dev/sources/infoworld)** · 1 min read · 185 upvotes · 13 comments ## Summary ECMA International has approved ECMAScript 2026 (ES2026), the 17th edition of the JavaScript specification, on June 30. The new edition introduces several additions: Math.sumPrecise for precise summation of iterables, Iterator.concat for sequencing iterators, Array.fromAsync for building arrays from async sources, Error.isError for identifying error objects, new Map and WeakMap prototype methods for default-value retrieval, Uint8Array methods for hex and base64 string conversion, a JSON.parse reviver parameter for accessing raw JSON source, and JSON.rawJSON for fine-grained control over JSON.stringify output. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@friedrich** · 20 upvotes > Finally! `Error.isError` instead of `error instanceof Error` **@apperside** · 15 upvotes > Wow! Those things will definitely improve many aspects of our daily job. Can't wait to try them out **@luispsarmiento** · 2 upvotes >  **@danieljohnbyns** · 1 upvotes > wow! this is shit **@codexsavage6s** · 0 upvotes > Hmm ...🤔 The Array.fromAsync looks promising ## Similar posts on daily.dev - [ES2026 Solves JavaScript Headaches With Dates, Math and Modules](https://daily.dev/posts/es2026-solves-javascript-headaches-with-dates-math-and-modules-y1adbmp5d) · The New Stack · 171 upvotes · 2 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript) [View this post on daily.dev](https://daily.dev/posts/ecmascript-2026-specification-approved-3orzqhzl9) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"ECMAScript 2026 specification approved","url":"https://daily.dev/posts/ecmascript-2026-specification-approved-3orzqhzl9","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/ecmascript-2026-specification-approved-3orzqhzl9"},"datePublished":"2026-07-07T03:28:53.072Z","dateModified":"2026-07-07T16:17:29.736Z","description":"ECMA International has approved ECMAScript 2026 (ES2026), the 17th edition of the JavaScript specification, on June 30. 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Error.isError instead of error instanceof Error","datePublished":"2026-07-07T11:43:26.747Z","url":"https://daily.dev/posts/3ORZQHZl9#c-om2lBKCVd","author":{"@type":"Person","name":"Friedrich WT","url":"https://daily.dev/friedrich","image":"https://avatars.githubusercontent.com/u/136119888?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":20}},{"@type":"Comment","text":"Wow! Those things will definitely improve many aspects of our daily job. Can’t wait to try them out","datePublished":"2026-07-07T04:30:25.857Z","url":"https://daily.dev/posts/3ORZQHZl9#c-3bYp6WAF3","author":{"@type":"Person","name":"Apperside","url":"https://daily.dev/apperside","image":"https://avatars.githubusercontent.com/u/5955338?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":15}},{"@type":"Comment","text":"","datePublished":"2026-07-09T18:38:43.522Z","url":"https://daily.dev/posts/3ORZQHZl9#c-rlKypl80w","author":{"@type":"Person","name":"Luis Puc","url":"https://daily.dev/luispsarmiento","image":"https://avatars.githubusercontent.com/u/25454970?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2}},{"@type":"Comment","text":"wow! this is shit","datePublished":"2026-07-08T10:34:20.727Z","url":"https://daily.dev/posts/3ORZQHZl9#c-GP7voCGfN","author":{"@type":"Person","name":"Daniel John","url":"https://daily.dev/danieljohnbyns","image":"https://avatars.githubusercontent.com/u/63223301?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"Hmm …🤔 The Array.fromAsync looks promising","datePublished":"2026-07-19T21:40:57.222Z","url":"https://daily.dev/posts/3ORZQHZl9#c-YmiIiu18o","author":{"@type":"Person","name":"Code X Savage","url":"https://daily.dev/codexsavage6s","image":"https://lh3.googleusercontent.com/a/ACg8ocK0nX9sL5dY7tHjUSK8NtYvb4oRSKm0HcLfnPih5DEiqeeSlg=s96-c"}}]} ```