#config

Fix Vitest 5 Projects Not Inheriting Root Config

Vitest 5's extends option defaults to true, so inline test.projects now inherit root plugins and setupFiles automatically. Fix it with extends: false.

Aug 13, 2026Read more →

A terminal window showing the real Astro build warning: markdown.remarkPlugins, markdown.rehypePlugins, and markdown.remarkRehype are deprecated, pass them to unified from at astrojs slash markdown-remark directly instead

Guides & Fixes

Fix Astro 7 markdown.rehypePlugins Deprecation Warning

Fix Astro 7's markdown.rehypePlugins deprecation warning. The exact config fix, tested live against a real Astro 7 build.

Aug 5, 2026Read more →

Vite's own migration guide text stating format sniffing between package.json browser and module fields has been removed, next to an explicit resolve.mainFields config

Guides & Fixes

Fix Vite 8 Browser/Module Field Resolution Change

Fix Vite 8 removing format sniffing between package.json browser and module fields. Explicit resolve.mainFields order now matters.

Aug 5, 2026Read more →

A code comparison showing build.rollupOptions renamed to build.rolldownOptions in a Vite config, with the same manualChunks function unchanged

Guides & Fixes

Fix Vite 8's build.rollupOptions Deprecation

Fix the build.rollupOptions deprecation warning in Vite 8. Rename to build.rolldownOptions before the old key is removed.

Aug 5, 2026Read more →

A terminal window showing the real error: Invalid output options for manualChunks, Expected Function but received Object, from a Vite 8 build using the old object-form vendor chunk config

Guides & Fixes

Fix Vite 8 manualChunks Object Form Removed

Fix Vite 8 rejecting object-form manualChunks. Rolldown only supports the function form - here's the real error and the fix.

Aug 5, 2026Read more →

A code comparison showing resolve.alias customResolver, removed in Vite 8, replaced by a plugin using a resolveId hook with enforce: 'pre'

Guides & Fixes

Fix Vite 8 resolve.alias customResolver Removal

Fix Vite 8 removing resolve.alias customResolver, which breaks CSS/JS path-alias plugins. Astro's own core fix shows the replacement.

Aug 5, 2026Read more →