vite

name	vite
description	Vite next-gen frontend tooling: dev server, HMR, build, config, plugins, Environment API, Rolldown. Use when setting up or running a Vite project, configuring vite.config.*, authoring plugins, working with HMR or JS API, or managing environment variables and modes. Keywords: vite.config, bundler, Vite, HMR, Rolldown.
metadata	{"version":"8.2.0","release_date":"2026-07-30"}

Vite

Quick navigation

• Getting started: references/getting-started.md
• Philosophy and rationale: references/philosophy.md, references/why-vite.md
• Features: references/features.md
• CLI: references/cli.md
• Plugins (usage): references/using-plugins.md
• Plugin API: references/api-plugin.md
• HMR API: references/api-hmr.md
• JavaScript API: references/api-javascript.md
• Config reference: references/config.md
• Dependency optimization: references/dep-pre-bundling.md
• Assets: references/assets.md
• Build: references/build.md
• Static deploy: references/static-deploy.md
• Env & modes: references/env-and-mode.md
• SSR: references/ssr.md
• Backend integration: references/backend-integration.md
• Troubleshooting: references/troubleshooting.md
• Performance: references/performance.md
• Rolldown: references/rolldown.md
• Migration: references/migration.md
• Breaking changes: references/breaking-changes.md
• Environment API: references/api-environment.md
• Environment instances: references/api-environment-instances.md
• Env plugins: references/api-environment-plugins.md
• Env frameworks: references/api-environment-frameworks.md
• Env runtimes: references/api-environment-runtimes.md

Core rules

• Prefer minimal configuration; extend only as needed.
• Keep index.html as a first-class entry point when using Vite defaults.
• Treat dev server settings and build settings separately.
• Document mode-dependent behavior for env variables and define.
• Use future config to opt-in to deprecation warnings before migration.

Recipes

• Scaffold a project with npm create vite@latest.
• Configure aliases, server options, and build outputs in vite.config.*.
• Load .env values into config with loadEnv when config needs them.
• Add plugins with plugins: [] and define apply or enforce when needed.
• Use HMR APIs for fine-grained updates when plugin or framework needs it.
• Use optimizeDeps.include/exclude when deps aren't discovered on startup.
• Use build.rollupOptions.input for multi-page apps.
• Use the top-level input option to declare the entry once for apps without index.html; it feeds build.rolldownOptions.input, build.lib.entry, build.ssr, and optimizeDeps.entries by default.
• Enable deprecation warnings: future: { removeSsrLoadModule: 'warn' }.
• Use hotUpdate hook instead of handleHotUpdate for environment-aware HMR.
• Use this.environment instead of options.ssr in plugin hooks.

Release Highlights (8.0.0)

• Default browser target is raised again under baseline-widely-available.
• CommonJS default-import interop becomes more consistent and may expose packages that relied on older ambiguous behavior.
• Vite stops resolving browser vs module via format sniffing and follows configured resolve.mainFields more strictly.
• JS API build() now throws BundleError with nested .errors when multiple Rolldown-level errors are present.
• Rolldown transition becomes more explicit: build.rollupOptions / worker.rollupOptions are deprecated in favor of *.rolldownOptions.

Release Highlights (8.1.0 -> 8.1.5)

• WASM ESM integration: direct .wasm imports work as ES modules natively.
• Zero-config build caching: integration with Vite Task enables build caching without manual setup.
• server.hmr renamed to server.ws: WebSocket options move under server.ws; update configs that set HMR transport options.
• New options: html.additionalAssetSources for custom asset sources during HTML transform, import.meta.glob caseSensitive, multiple hosts via __VITE_ADDITIONAL_SERVER_ALLOWED_HOSTS, and an extended default server.fs.deny list.
• 8.1.1 -> 8.1.5: stability only (stack-trace handling, dependency bumps, module-resolution edge cases).

Release Highlights (8.2.0)

• New top-level input option: input: string | string[] | { [entryAlias: string]: string } resolves relative to the project root and becomes the default value for build.rolldownOptions.input, build.lib.entry, build.ssr (when set to true), and optimizeDeps.entries whenever those are left unset; useful for apps that skip index.html and would otherwise repeat the same entry path in several options. The resolved input paths are also added to server.fs.allow, matching how imported modules are already allowed.
• Bundled dev mode (experimental.bundledDev): a boundary-less edit now triggers exactly one reload; the client tells the server to rebuild first and only then issues full-reload, so the "bundling in progress" fallback page no longer flashes between an edit and the reload. Worker files (new Worker(new URL(...)), ?worker imports) are now correctly re-emitted through HMR instead of going stale after an edit.
• Native loader / native-config compatibility: warnings about features unsupported by configLoader: 'native' now include a column alongside the line number, and virtual modules are excluded from the native-config compatibility check so plugin-generated virtual files no longer trigger false positives.
• Type-safe PostCSS config: Vite exports PostcssUserConfig (re-exported from postcss-load-config's Config type) so postcss.config.js/.ts can be typed directly.
• Network URL labeling: dev server network URLs now resolve and print the OS network-interface name (e.g. eth0, wlan0) even when server.host is an explicit address, not only when Vite auto-detects every interface.
• Rolldown and optimizer updates: Rolldown bumps to ~1.2.0, bringing client-side HMR handling into experimental.bundledDev; the dependency optimizer's lockfile-hash cache now also recognizes aube-lock.yaml (Aube) and nub.lock (nub), so those package managers correctly invalidate node_modules/.vite on dependency changes.

Patch Notes (8.0.14 -> 8.0.16)

• Rolldown moves to 1.0.3 (was 1.0.2 in 8.0.14); if you maintain plugin or build guidance, validate it against the current Rolldown behavior instead of assuming early 8.0.x patch semantics.
• Dev server now sends HTTP 408 on request timeout instead of hanging the connection (8.0.15).
• launch-editor-middleware rejects UNC paths and Windows alternate paths, closing a local path-traversal vector (8.0.16); relevant if you expose the dev server beyond localhost.
• 8.0.15 fixes: /@fs/ HTML-proxy cache-key mismatch, relative-glob-in-virtual-module errors when no files match, closing the Rolldown bundle when write() rejects, and onWarn for viteResolvePlugin in JS plugin containers.
• transformIndexHtml handles trailing-slash paths more reliably, which matters for plugins and static deploy setups that rewrite or inject HTML on directory-style URLs.
• Dependency scanning now passes Oxc JSX options through the optimizer path, so JSX-heavy linked dependencies should behave closer to the main transform pipeline.

Prohibitions

• Do not copy large verbatim chunks from vendor docs.
• Do not assume framework-specific behavior without verifying.

Links

• Documentation
• Releases
• GitHub
• npm