--- title: Announcing TypeScript 5.4 RC | daily.dev description: TypeScript 5.4 is a release candidate with new features such as preserved narrowing in closures, the NoInfer utility type, Object.groupBy and Map.groupBy... canonical: https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Announcing TypeScript 5.4 RC | daily.dev og:description: TypeScript 5.4 is a release candidate with new features such as preserved narrowing in closures, the NoInfer utility type, Object.groupBy and Map.groupBy... og:url: https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc og:image: https://api.daily.dev/og/posts/tNlkADiZc.png og:image:alt: Announcing TypeScript 5.4 RC 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 5.4 RC **[Typescript](https://daily.dev/sources/ts)** · 12 min read · 10 upvotes · 0 comments ## Summary TypeScript 5.4 is a release candidate with new features such as preserved narrowing in closures, the NoInfer utility type, Object.groupBy and Map.groupBy methods, support for require() calls in moduleResolution bundler and module preserve, and more. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments --- Tags: [#typescript](https://daily.dev/tags/typescript) [View this post on daily.dev](https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc) ```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 5.4 RC","url":"https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc"},"datePublished":"2024-02-22T18:40:12.844Z","dateModified":"2024-05-09T09:06:08.895Z","description":"TypeScript 5.4 is a release candidate with new features such as preserved narrowing in closures, the NoInfer utility type, Object.groupBy and Map.groupBy...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/065a3a9a06a786d7328a931d00589001?_a=AQAEufR","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/065a3a9a06a786d7328a931d00589001?_a=AQAEufR","isAccessibleForFree":true,"articleSection":"Typescript","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Typescript","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/42da81680eee425bbf1513c1fb7dd5c4","url":"https://daily.dev/sources/ts"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/announcing-typescript-5-4-rc-tnlkadizc","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":10},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"typescript","timeRequired":"PT12M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Typescript","item":"https://daily.dev/sources/ts"},{"@type":"ListItem","position":3,"name":"Announcing TypeScript 5.4 RC"}]} ```