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Skip emitFile() in astro:scripts plugin during serve mode #16081

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Merged
matthewp merged 1 commit into from
Mar 25, 2026
Merged

Skip emitFile() in astro:scripts plugin during serve mode #16081

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5 changes: 5 additions & 0 deletions .changeset/fix-emitfile-serve-warning.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'astro': patch
---

Fixes the `emitFile() is not supported in serve mode` warning that appears during `astro dev` when using integrations that inject before-hydration scripts (e.g. `@astrojs/react`)
7 changes: 6 additions & 1 deletion packages/astro/src/vite-plugin-scripts/index.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import type { Plugin as VitePlugin } from 'vite';
import type { Plugin as VitePlugin, ConfigEnv } from 'vite';
import type { AstroSettings } from '../types/astro.js';
import type { InjectedScriptStage } from '../types/public/integrations.js';
import { ASTRO_VITE_ENVIRONMENT_NAMES } from '../core/constants.js';
Expand All @@ -14,8 +14,12 @@ export const PAGE_SCRIPT_ID = `${SCRIPT_ID_PREFIX}${'page' as InjectedScriptStag
export const PAGE_SSR_SCRIPT_ID = `${SCRIPT_ID_PREFIX}${'page-ssr' as InjectedScriptStage}.js`;

export default function astroScriptsPlugin({ settings }: { settings: AstroSettings }): VitePlugin {
let command: 'build' | 'serve';
return {
name: 'astro:scripts',
config(_: any, env: ConfigEnv) {
command = env.command;
},

resolveId: {
filter: {
Expand Down Expand Up @@ -58,6 +62,7 @@ export default function astroScriptsPlugin({ settings }: { settings: AstroSettin
},
},
buildStart() {
if (command === 'serve') return;
const hasHydrationScripts = settings.scripts.some((s) => s.stage === 'before-hydration');
if (
hasHydrationScripts &&
Expand Down
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