--- title: Vue Basics: Understanding useId in Vue 3 | daily.dev description: Vue 3's useId generates unique, stable IDs for reusable components, fixing duplicate ID bugs and SSR hydration mismatches. Hardcoded IDs break when a component... canonical: https://daily.dev/posts/vue-basics-understanding-useid-in-vue-3-vm6m5mz0h twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Vue Basics: Understanding useId in Vue 3 | daily.dev og:description: Vue 3's useId generates unique, stable IDs for reusable components, fixing duplicate ID bugs and SSR hydration mismatches. Hardcoded IDs break when a component... og:url: https://daily.dev/posts/vue-basics-understanding-useid-in-vue-3-vm6m5mz0h og:image: https://api.daily.dev/og/posts/Vm6M5Mz0H.png og:image:alt: Vue Basics: Understanding useId in Vue 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. # Vue Basics: Understanding useId in Vue 3 **[Telerik](https://daily.dev/sources/telerik)** · 9 min read · 1 upvotes · 0 comments ## Summary Vue 3's useId generates unique, stable IDs for reusable components, fixing duplicate ID bugs and SSR hydration mismatches. Hardcoded IDs break when a component renders multiple times, causing invalid HTML and broken label-input associations. Math.random() or UUID libraries fix uniqueness but produce different values on server and client, triggering hydration warnings. useId solves both: Vue generates the ID so it stays consistent across server render and client hydration. It's meant for DOM relationships like label-input pairs and aria-describedby, not for database IDs, API identifiers, or v-for keys. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I generate unique IDs for a reusable Vue component without breaking SSR hydration? Use Vue 3's useId composable instead of Math.random() or a UUID library. useId generates a unique, stable ID for each component instance, and because Vue controls the rendering process, it produces the same ID on the server and during client hydration, avoiding mismatches and hydration warnings that random generators cause. _daily.dev surfaces practical Vue patterns like this for developers wiring up accessible, SSR-safe components._ ### Should I use Vue's useId for v-for list keys or API resource IDs? No, useId is designed only for DOM relationships such as linking a label to an input or connecting helper text via aria-describedby. It is not meant to replace database IDs, API identifiers, or v-for keys, which represent application data and need identifiers designed for that purpose. _Developers sorting out ID strategies in Vue apps can find clarifications like this on daily.dev._ ## Similar posts on daily.dev - [You Don’t Know useRef Yet: The Hook Beyond DOM Refs — Frontend Master](https://daily.dev/posts/you-don-t-know-useref-yet-the-hook-beyond-dom-refs-frontend-master-inho4m2aa) · Medium · 10 upvotes · 1 comments - [Vue Basics: Ultimate Guide to Vue 3 Reactivity](https://daily.dev/posts/vue-basics-ultimate-guide-to-vue-3-reactivity-l3lntlfjf) · Telerik · 52 upvotes · 1 comments - [Server Components and React Frameworks](https://daily.dev/posts/server-components-and-react-frameworks-7dkp79lhn) · Kirupa · 1 upvotes · 0 comments - [Vue Basics: A Comprehensive Guide to Vue 3 Directives](https://daily.dev/posts/vue-basics-a-comprehensive-guide-to-vue-3-directives-rd9vuugfj) · Telerik · 20 upvotes · 1 comments --- Tags: [#webdev](https://daily.dev/tags/webdev), [#vuejs](https://daily.dev/tags/vuejs), [#accessibility](https://daily.dev/tags/accessibility) [View this post on daily.dev](https://daily.dev/posts/vue-basics-understanding-useid-in-vue-3-vm6m5mz0h) ```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":"Vue Basics: Understanding useId in Vue 3","url":"https://daily.dev/posts/vue-basics-understanding-useid-in-vue-3-vm6m5mz0h","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/vue-basics-understanding-useid-in-vue-3-vm6m5mz0h"},"datePublished":"2026-10-28T16:19:58.133Z","dateModified":"2026-10-28T16:34:51.354Z","description":"Vue 3's useId generates unique, stable IDs for reusable components, fixing duplicate ID bugs and SSR hydration mismatches. 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