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Fix unnecessary backend reloads when editing client-side components#16924

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ematipico merged 2 commits into
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flue/fix-15951
Jun 3, 2026
Merged

Fix unnecessary backend reloads when editing client-side components#16924
ematipico merged 2 commits into
mainfrom
flue/fix-15951

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Changes

  • Fixes a v6 regression where editing client-side components (client:idle, client:load, client:visible, etc.) causes a full backend program reload during development
  • Returns empty array from astro:hmr-reload plugin when all processed modules exist only in the client module graph, preventing Vite's default SSR HMR propagation
  • Matches the existing pattern used for style modules (CSS/SCSS) that was fixed in PR fix: avoid full-reload in scss modules #14924

Testing

  • Added unit test returns empty array for client-only modules to prevent unnecessary backend reloads covering the specific case where all modules are client-side
  • Verified fix prevents [vite] program reload and server-side module re-execution when editing client components
  • Confirmed no regression for SSR-only module invalidation

Docs

  • No docs update needed - this fixes a bug to restore expected v5 behavior

Closes #15951

@astrobot-houston astrobot-houston added the fix verified Reporter confirmed the triage bot fix works label May 31, 2026
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changeset-bot Bot commented May 31, 2026

🦋 Changeset detected

Latest commit: 9aae8dd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 397 packages
Name Type
astro Patch
@e2e/astro-linked-lib Patch
@e2e/actions-blog Patch
@e2e/actions-react-19 Patch
@e2e/astro-component Patch
@e2e/astro-envs Patch
@e2e/astro-island-hydration-error Patch
@test/astro-cloudflare-node-prerender-mdx Patch
@test/astro-cloudflare Patch
@e2e/content-collections Patch
@e2e/csp-server-islands Patch
@e2e/css Patch
@test/custom-client-directives Patch
@e2e/dev-toolbar Patch
@e2e/error-cyclic Patch
@e2e/error-sass Patch
@e2e/errors Patch
@e2e/hydration-race Patch
@e2e/i18n Patch
@test/nested-style-bug-e22e Patch
@e2e/preact-compat-component Patch
@e2e/preact-component Patch
@e2e/preact-lazy-component Patch
@e2e/prefetch Patch
@e2e/react-component Patch
@e2e/server-islands-key Patch
@e2e/server-islands Patch
@e2e/solid-circular Patch
@e2e/solid-component Patch
@e2e/solid-recurse Patch
@e2e/svelte-component Patch
@e2e/e2e-tailwindcss Patch
@e2e/ts-resolution Patch
@e2e/view-transitions Patch
@e2e/vite-virtual-modules Patch
@e2e/vue-component Patch
@performance/md Patch
@performance/mdoc Patch
@performance/mdx Patch
@test/0-css Patch
fake-astro-library Patch
@test/actions Patch
@test/alias-path-alias-style Patch
@test/ts-paths-no-baseurl Patch
@test/aliases-tsconfig Patch
@test/aliases Patch
@test/api-routes Patch
@test/asset-query-params-chunks Patch
@test/asset-url-base Patch
@test/astro-pages Patch
@test/astro-assets-prefix Patch
@test/astro-assets Patch
@test/astro-basic Patch
@test/astro-check-errors Patch
@test/astro-check-no-errors Patch
@test/astro-check-watch Patch
@test/astro-children Patch
@test/astro-client-only Patch
@test/astro-component-bundling Patch
@test/astro-component-code Patch
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@test/astro-dev-headers Patch
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@test/astro-markdown-skiki-default-color Patch
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@test/build-readonly-file Patch
@test/cache-memory-query-include Patch
@test/cache-memory-query Patch
@test/client-address-node Patch
@test/code-component Patch
@test/component-library Patch
@test/config-vite-css-target Patch
@test/config-vite Patch
@test/react-container Patch
@test/content-with-spaces-in-folder-name Patch
@test/content-collection-picture-render Patch
@example/content-collection-references Patch
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@test/content-collections-empty-dir Patch
@test/content-collections-empty-md-file Patch
@test/content-collections-mutation Patch
@test/content-collections-number-id Patch
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@test/content-collections-with-config-mjs Patch
@test/content-collections Patch
@test/content-frontmatter Patch
@test/content-intellisense Patch
@test/content-layer-loader-schema-function Patch
@test/content-layer-remark-plugins Patch
@test/content-layer Patch
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@test/content-static-paths-integration Patch
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@test/core-image-data-url Patch
@test/core-image-deletion-ssr Patch
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@test/core-image-unconventional-settings Patch
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@test/csp-fonts Patch
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@test/css-assets Patch
@test/css-dangling-references Patch
@test/css-deduplication Patch
@test/css-double-bundle Patch
@test/css-dynamic-import-dev Patch
@test/css-import-as-inline Patch
@test/css-inline-stylesheets Patch
@test/css-no-code-split Patch
@test/css-pure-chunk-query-params Patch
@test/custom-404-injected-from-dep Patch
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custom-fetch-error-pages Patch
@test/custom-renderer Patch
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@test/debug-component Patch
@test/dev-container Patch
@test/dev-render Patch
@test/dev-request-url Patch
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@test/dynamic-route-build-file Patch
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@test/error-bad-js Patch
@test/error-build-location Patch
@test/error-non-error Patch
@test/extension-matching Patch
@test/fetch Patch
@test/fonts Patch
@test/astro-fontsource-package Patch
@test/get-static-paths-pages Patch
@test/glob-pages-css Patch
@test/head-propagation-prerender-env Patch
@test/hmr-markdown Patch
@test/hmr-new-page Patch
@test/hmr-slots-render Patch
@test/hoisted-imports Patch
@test/html-component Patch
@test/html-escape Patch
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@test/hydration-race Patch
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@test/tailwindcss Patch
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@test/url-import-suffix Patch
@test/view-transitions Patch
@test/virtual-astro-file Patch
@test/vitest Patch
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@test/astro-cloudflare-with-base Patch
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@test/astro-cloudflare-with-svelte Patch
@test/astro-cloudflare-with-vue Patch
@test/astro-cloudflare-wrangler-preview-platform Patch
@test/markdoc-content-collections Patch
@test/content-layer-markdoc Patch
@test/headings-custom Patch
@test/headings Patch
@test/image-assets-custom Patch
@test/image-assets Patch
@test/markdoc-propagated-assets Patch
@test/markdoc-render-with-space Patch
@test/markdoc-render-html Patch
@test/markdoc-render-null Patch
@test/markdoc-render-partials Patch
@test/markdoc-render-simple Patch
@test/markdoc-render-table-attrs Patch
@test/markdoc-render-typographer Patch
@test/markdoc-render-with-components Patch
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@test/markdoc-render-with-indented-components Patch
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@test/markdoc-variables Patch
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@test/mdx-css-head-mdx Patch
@test/image-remark-imgattr Patch
@test/mdx-astro-container-escape Patch
@test/mdx-frontmatter-injection Patch
@test/netlify-skew-protection Patch
@test/netlify-hosted-astro-project Patch
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@github-actions github-actions Bot added the pkg: astro Related to the core `astro` package (scope) label May 31, 2026
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github-actions Bot commented May 31, 2026

e18e dependency analysis

No dependency warnings found.

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LGTM once CI passes

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codspeed-hq Bot commented Jun 3, 2026

Merging this PR will not alter performance

✅ 18 untouched benchmarks


Comparing flue/fix-15951 (9aae8dd) with main (a6b0852)

Open in CodSpeed

@ematipico ematipico merged commit 2c0bc94 into main Jun 3, 2026
29 checks passed
@ematipico ematipico deleted the flue/fix-15951 branch June 3, 2026 12:59
@astrobot-houston astrobot-houston mentioned this pull request Jun 3, 2026
dadezzz pushed a commit to dadezzz/university_notes that referenced this pull request Jun 7, 2026
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)) | [`6.4.3` → `6.4.4`](https://renovatebot.com/diffs/npm/astro/6.4.3/6.4.4) | ![age](https://developer.mend.io/api/mc/badges/age/npm/astro/6.4.4?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/astro/6.4.3/6.4.4?slim=true) |

---

### Release Notes

<details>
<summary>withastro/astro (astro)</summary>

### [`v6.4.4`](https://github.com/withastro/astro/blob/HEAD/packages/astro/CHANGELOG.md#644)

[Compare Source](https://github.com/withastro/astro/compare/[email protected]@6.4.4)

##### Patch Changes

- [#&#8203;16926](withastro/astro#16926) [`1b39ae8`](withastro/astro@1b39ae8) Thanks [@&#8203;narendraio](https://github.com/narendraio)! - Prevents `App.match()` from throwing on request paths that contain an invalid percent-sequence.

- [#&#8203;16924](withastro/astro#16924) [`2c0bc94`](withastro/astro@2c0bc94) Thanks [@&#8203;astrobot-houston](https://github.com/astrobot-houston)! - Fixes an issue where editing a client-side component (e.g. with `client:idle`, `client:load`, etc.) caused an unnecessary full program reload of the backend during development.

- [#&#8203;16958](withastro/astro#16958) [`2c1d50f`](withastro/astro@2c1d50f) Thanks [@&#8203;fkatsuhiro](https://github.com/fkatsuhiro)! - Fixes a bug where static file endpoints using `getStaticPaths` with `.html` in dynamic param values (e.g. `{ path: 'file.html' }`) would fail with a `NoMatchingStaticPathFound` error during build. The `.html` suffix is no longer incorrectly stripped from endpoint route pathnames.

- [#&#8203;16855](withastro/astro#16855) [`c610cda`](withastro/astro@c610cda) Thanks [@&#8203;astrobot-houston](https://github.com/astrobot-houston)! - Fixes dynamic routes returning 500 "TypeError: Missing parameter" when using domain-based i18n routing in SSR.

- [#&#8203;16946](withastro/astro#16946) [`606c37b`](withastro/astro@606c37b) Thanks [@&#8203;ematipico](https://github.com/ematipico)! - Fixes `Astro.routePattern` to preserve original casing of dynamic parameter names from filenames. Previously, a file at `src/pages/blog/[postId].astro` would return `/blog/[postid]` for `Astro.routePattern` due to an internal `.toLowerCase()` call. It now correctly returns `/blog/[postId]`.

- [#&#8203;16720](withastro/astro#16720) [`16d49b6`](withastro/astro@16d49b6) Thanks [@&#8203;thomas-callahan-collibra](https://github.com/thomas-callahan-collibra)! - Fix an issue where dynamic routes would return the string `[object Object]` instead of the expected content, in certain runtimes.

- [#&#8203;16703](withastro/astro#16703) [`17390a6`](withastro/astro@17390a6) Thanks [@&#8203;henrybrewer00-dotcom](https://github.com/henrybrewer00-dotcom)! - Fixes styles being stripped when the project root is started with a path whose case differs from the actual filesystem case (e.g. running `astro dev` from `d:\dev\app` while the folder on disk is `D:\dev\app`).

- [#&#8203;16855](withastro/astro#16855) [`c610cda`](withastro/astro@c610cda) Thanks [@&#8203;astrobot-houston](https://github.com/astrobot-houston)! - Fixes `Astro.currentLocale` returning the default locale instead of the domain's locale on dynamic routes served from a mapped domain.

</details>

---

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changes to client:idle components cause a program reload for the backend

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