--- title: Bun 1.3 | daily.dev description: Bun 1.3 transforms Bun into a full-stack JavaScript runtime with zero-config frontend development featuring hot module replacement and React Fast Refresh. The... canonical: https://daily.dev/posts/bun-1-3-eq6elzvlt twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Bun 1.3 | daily.dev og:description: Bun 1.3 transforms Bun into a full-stack JavaScript runtime with zero-config frontend development featuring hot module replacement and React Fast Refresh. The... og:url: https://daily.dev/posts/bun-1-3-eq6elzvlt og:image: https://api.daily.dev/og/posts/eQ6ELzvLT.png og:image:alt: Bun 1.3 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. # Bun 1.3 **[Bun](https://daily.dev/sources/bun)** · 68 min read · 22 upvotes · 1 comments ## Summary Bun 1.3 transforms Bun into a full-stack JavaScript runtime with zero-config frontend development featuring hot module replacement and React Fast Refresh. The release introduces a unified SQL API supporting MySQL, MariaDB, PostgreSQL, and SQLite, plus a built-in Redis client. New routing capabilities in Bun.serve() enable full-stack apps in a single process, with support for compiling to standalone executables. The package manager gains isolated installs, dependency catalogs, security scanning, and interactive updates. Testing improvements include VS Code integration, concurrent test execution, async stack traces, and type testing. Additional features include native cookie handling, YAML support, WebSocket compression, Zstandard compression, encrypted credential storage, and CSRF protection. ## 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 > Bun is getting more attractive by the day --- Tags: [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript), [#react](https://daily.dev/tags/react), [#testing](https://daily.dev/tags/testing), [#bun](https://daily.dev/tags/bun) [View this post on daily.dev](https://daily.dev/posts/bun-1-3-eq6elzvlt) ```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":"Bun 1.3","url":"https://daily.dev/posts/bun-1-3-eq6elzvlt","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/bun-1-3-eq6elzvlt"},"datePublished":"2025-10-10T20:40:27.387Z","dateModified":"2026-03-02T17:33:47.381Z","description":"Bun 1.3 transforms Bun into a full-stack JavaScript runtime with zero-config frontend development featuring hot module replacement and React Fast Refresh. 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