--- title: Announcing TypeScript 4.0 | daily.dev description: TypeScript 4.0 is the next generation of the TypeScript language. TypeScript is a language that builds on top of JavaScript by adding syntax for static types.... canonical: https://daily.dev/posts/announcing-typescript-4-0-zng7mzaov twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Announcing TypeScript 4.0 | daily.dev og:description: TypeScript 4.0 is the next generation of the TypeScript language. TypeScript is a language that builds on top of JavaScript by adding syntax for static types.... og:url: https://daily.dev/posts/announcing-typescript-4-0-zng7mzaov og:image: https://api.daily.dev/og/posts/zNg7MZaOv.png og:image:alt: Announcing TypeScript 4.0 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. # Announcing TypeScript 4.0 **[Echo JS](https://daily.dev/sources/echojs)** · 19 min read · 4 upvotes · 1 comments ## Summary TypeScript 4.0 is the next generation of the TypeScript language. TypeScript is a language that builds on top of JavaScript by adding syntax for static types. There are no major breaking changes in TypeScript4.0, and you really only need to know the basics of TypeScript to be productive. ## 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. **@idoshamun** · 0 upvotes > TypeScript 4.0 is here with a new massive features list. Variadic tuple types, labeled tuple elements, a new unknown type for catch blocks are just examples of the goodness TS 4.0 brings. --- Tags: [#devtools](https://daily.dev/tags/devtools), [#javascript](https://daily.dev/tags/javascript), [#typescript](https://daily.dev/tags/typescript) [View this post on daily.dev](https://daily.dev/posts/announcing-typescript-4-0-zng7mzaov) ```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":"Announcing TypeScript 4.0","url":"https://daily.dev/posts/announcing-typescript-4-0-zng7mzaov","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/announcing-typescript-4-0-zng7mzaov"},"datePublished":"2020-08-20T18:04:08.643Z","dateModified":"2026-03-15T07:40:51.833Z","description":"TypeScript 4.0 is the next generation of the TypeScript language. 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