v0.13.0

Added

• env_prefix config for choosing which .env variables are exposed through import.meta.env, including Vite-compatible prefixes like "VITE_".
• asset_url_prefix config and mix volt.build --asset-url-prefix for changing production JavaScript and CSS asset URLs without changing Phoenix output paths.
• Production chunk manifests now include richer chunk metadata: imports, dynamicImports, chunk-local css, and emitted assets.
• Plugin embedded_modules/3 hook for exposing JavaScript-like scripts embedded in custom file formats.

Changed

• Upgraded oxc to 0.15.1, quickbeam to 0.10.15, and reach to 2.6.1.
• mix volt.js.check now supports --type-aware and --type-check for TypeScript-aware linting through tsgolint.
• Type-aware checks now analyze Vue and Svelte component scripts via plugin-provided virtual modules while leaving templates on the normal syntax lint path.
• Production builds now tree-shake JavaScript by default, with tree_shaking: false and mix volt.build --no-tree-shaking available to preserve unused exports.
• Code-split dynamic imports now preload dependency chunks and chunk-local CSS when doing so avoids loading waterfalls.
• Code-split production builds now preserve dynamic import facades, rewrite chunk imports by exact resolved specifier, and avoid worker filename collisions.
• HMR boundary lookup now uses a served module graph, with a dedicated glob graph for import.meta.glob() invalidation.
• HMR updates now support self-accepting modules, dependency accept callbacks, multi-dependency accept callbacks, disposal data, CSS import updates, and full-reload fallback more closely to Vite's behavior.
• Production builds now write the final merged manifest once after all entries are built.
• Production JavaScript asset URL imports now emit hashed files and include them in manifest asset metadata.
• Worker build failures now fail the parent build instead of being ignored.
• JavaScript runtime installs now validate package signatures for reused install directories, and named runtimes reject option mismatches.
• glob_ex is now a direct dependency for HMR glob invalidation.
• Volt now dogfoods type-aware JavaScript checks in mix lint.

Breaking changes

• Custom plugins that return {:proxy, filename, opts} from prebundle_entry/1 must use Volt.JS.PrebundleEntry.Import and Volt.JS.PrebundleEntry.Export entries for :imports and :exports; plain map entries are no longer accepted.
• Custom extract_imports/3 plugin callbacks must return {:ok, %Volt.JS.ImportExtractor.Result{}} instead of plain maps.