--- title: Docusaurus 3.9 | daily.dev description: Docusaurus 3.9 drops Node.js 18 support and requires Node.js 20+, adds Algolia DocSearch v4 with AI-powered search assistant, improves internationalization... canonical: https://daily.dev/posts/docusaurus-3-9-deqtfifry twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Docusaurus 3.9 | daily.dev og:description: Docusaurus 3.9 drops Node.js 18 support and requires Node.js 20+, adds Algolia DocSearch v4 with AI-powered search assistant, improves internationalization... og:url: https://daily.dev/posts/docusaurus-3-9-deqtfifry og:image: https://api.daily.dev/og/posts/DeQtFIfry.png og:image:alt: Docusaurus 3.9 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. # Docusaurus 3.9 **[Docusaurus](https://daily.dev/sources/docusaurus)** · 5 min read · 126 upvotes · 8 comments ## Summary Docusaurus 3.9 drops Node.js 18 support and requires Node.js 20+, adds Algolia DocSearch v4 with AI-powered search assistant, improves internationalization with new locale configuration options, introduces Mermaid ELK layout support for complex diagrams, and includes various performance improvements and bug fixes. ## 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. **@rappayne** · 5 upvotes > @docasaurus Serious question ... you say you follow SEMVER but this release is a 3.9. Yet you're dropping support for Node 18. That's a breaking change! Shouldn't it be a 4.0 release according to SEMVER? Help me understand what I'm missing. **@sergeyvolkov** · 1 upvotes > I think this is almost not used technology to create documentation, maybe I am not right but most people use vitepress (me too) **@shaktirajsinhjadeja** · 0 upvotes > looks interesting :) --- Tags: [#webdev](https://daily.dev/tags/webdev), [#nodejs](https://daily.dev/tags/nodejs), [#algolia](https://daily.dev/tags/algolia), [#docusaurus](https://daily.dev/tags/docusaurus) [View this post on daily.dev](https://daily.dev/posts/docusaurus-3-9-deqtfifry) ```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":"Docusaurus 3.9","url":"https://daily.dev/posts/docusaurus-3-9-deqtfifry","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/docusaurus-3-9-deqtfifry"},"datePublished":"2025-09-25T17:49:57.930Z","dateModified":"2025-09-25T17:50:16.406Z","description":"Docusaurus 3.9 drops Node.js 18 support and requires Node.js 20+, adds Algolia DocSearch v4 with AI-powered search assistant, improves internationalization...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0ef81ef4131f5e4950eada76dd762255?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/0ef81ef4131f5e4950eada76dd762255?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"Docusaurus","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":"Docusaurus","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/5f3722c0b00a4f58a4d509e26dc22e53","url":"https://daily.dev/sources/docusaurus"},"commentCount":8,"discussionUrl":"https://daily.dev/posts/docusaurus-3-9-deqtfifry","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":126},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":8}],"keywords":"webdev,nodejs,algolia,docusaurus","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Docusaurus","item":"https://daily.dev/sources/docusaurus"},{"@type":"ListItem","position":3,"name":"Docusaurus 3.9"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/docusaurus-3-9-deqtfifry","comment":[{"@type":"Comment","text":"@docasaurus Serious question … you say you follow SEMVER but this release is a 3.9. Yet you’re dropping support for Node 18. That’s a breaking change! Shouldn’t it be a 4.0 release according to SEMVER? Help me understand what I’m missing.","datePublished":"2025-09-26T13:54:18.769Z","url":"https://daily.dev/posts/DeQtFIfry#c-SPLP8GA9L","author":{"@type":"Person","name":"Rap Payne","url":"https://daily.dev/rappayne","image":"https://avatars.githubusercontent.com/u/1122906?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":5}},{"@type":"Comment","text":"I think this is almost not used technology to create documentation, maybe I am not right but most people use vitepress (me too)","datePublished":"2025-09-26T06:55:46.890Z","url":"https://daily.dev/posts/DeQtFIfry#c-b5KIRhdRx","author":{"@type":"Person","name":"Sergey Volkov","url":"https://daily.dev/sergeyvolkov","image":"https://media.daily.dev/image/upload/s--5NrbX2x0--/f_auto/v1758869632/avatars/avatar_16HM0snNB2EsL20uW896e?_a=BAMAK+ZW0"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1}},{"@type":"Comment","text":"looks interesting :)","datePublished":"2025-09-30T11:59:20.844Z","url":"https://daily.dev/posts/DeQtFIfry#c-ESyhTO9bj","author":{"@type":"Person","name":"Shaktirajsinh Jadeja","url":"https://daily.dev/shaktirajsinhjadeja","image":"https://lh3.googleusercontent.com/a/ACg8ocJfxNtW02M-fSJX6U7cvMTAnrVRap5fYXgIDAg8OdAqL6ARTQ=s96-c"}}]} ```