Fix astro preview ignoring vite.preview.allowedHosts from astro.config.mjs#16104
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Fix astro preview ignoring vite.preview.allowedHosts from astro.config.mjs#16104
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The static preview server was building its own Vite config from scratch and only reading from settings.config.server.*, completely ignoring settings.config.vite. This meant that vite.preview.allowedHosts (and other vite.preview.* options) set via the vite field in astro.config.mjs were silently dropped. Fix by merging the user's vite config as the base before applying Astro's overrides, matching how the dev server handles this via createVite(). allowedHosts is handled separately after the merge to avoid array concatenation — Astro's server.allowedHosts takes precedence when explicitly set, otherwise vite.preview.allowedHosts is preserved. Closes #16088
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This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [astro](https://astro.build) ([source](https://github.com/withastro/astro/tree/HEAD/packages/astro)) | [`6.1.1` → `6.1.3`](https://renovatebot.com/diffs/npm/astro/6.1.1/6.1.3) |  |  | --- ### Release Notes <details> <summary>withastro/astro (astro)</summary> ### [`v6.1.3`](https://github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#613) [Compare Source](https://github.com/withastro/astro/compare/astro@6.1.2...astro@6.1.3) ##### Patch Changes - [#​16161](withastro/astro#16161) [`b51f297`](withastro/astro@b51f297) Thanks [@​matthewp](https://github.com/matthewp)! - Fixes a dev rendering issue with the Cloudflare adapter where head metadata could be missing and dev CSS/scripts could be injected in the wrong place - [#​16110](withastro/astro#16110) [`de669f0`](withastro/astro@de669f0) Thanks [@​tmimmanuel](https://github.com/tmimmanuel)! - Fixes skew protection query parameters not being appended to inter-chunk JavaScript imports in client bundles, which could cause version mismatches during rolling deployments on Vercel - [#​16162](withastro/astro#16162) [`a0a49e9`](withastro/astro@a0a49e9) Thanks [@​rururux](https://github.com/rururux)! - Fixes an issue where HMR would not trigger when modifying files while using [@​astrojs/cloudflare](https://github.com/astrojs/cloudflare) with prerenderEnvironment: 'node' enabled. - [#​16142](withastro/astro#16142) [`7454854`](withastro/astro@7454854) Thanks [@​rururux](https://github.com/rururux)! - Fixes HTML content being incorrectly escaped as plain text when rendering a MDX component using the `AstroContainer` APIs. - [#​16116](withastro/astro#16116) [`12602a9`](withastro/astro@12602a9) Thanks [@​riderx](https://github.com/riderx)! - Fixes a bug where page-level CSS could leak between unrelated pages when traversing style parents across top-level route boundaries - [#​16178](withastro/astro#16178) [`a7e7567`](withastro/astro@a7e7567) Thanks [@​matthewp](https://github.com/matthewp)! - Fixes SSR builds failing with "No matching renderer found" when a project only has injected routes and no `src/pages/` directory ### [`v6.1.2`](https://github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#612) [Compare Source](https://github.com/withastro/astro/compare/astro@6.1.1...astro@6.1.2) ##### Patch Changes - [#​16104](withastro/astro#16104) [`47a394d`](withastro/astro@47a394d) Thanks [@​matthewp](https://github.com/matthewp)! - Fixes `astro preview` ignoring `vite.preview.allowedHosts` set in `astro.config.mjs` - [#​16047](withastro/astro#16047) [`711f837`](withastro/astro@711f837) Thanks [@​matthewp](https://github.com/matthewp)! - Fixes catch-all routes incorrectly intercepting requests for static assets when using the `@astrojs/node` adapter in middleware mode. - [#​15981](withastro/astro#15981) [`a60cbb6`](withastro/astro@a60cbb6) Thanks [@​moktamd](https://github.com/moktamd)! - Fix Zod v4 validation error formatting to show human-readable messages instead of raw JSON </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). <!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My45OS4xIiwidXBkYXRlZEluVmVyIjoiNDMuOTkuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==--> Co-authored-by: Renovate Bot <renovate@zarantonello.dev> Co-committed-by: Renovate Bot <renovate@zarantonello.dev>
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Changes
astro previewnow respectsvite.preview.allowedHostsviteconfig as the base before applying Astro's own overrides with our configuration winning.Testing
test/astro-preview-allowed-hosts.test.jswith five cases: allowing a listed host viavite.preview.allowedHosts, blocking an unlisted host, allowing all hosts whenallowedHosts: true, and verifying thatserver.allowedHoststakes precedence overvite.preview.allowedHostswhen both are set.Docs
N/A bug fix
Closes #16088