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fix: deduplicate content script CSS in build output #2268

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fix: deduplicate content script CSS in build output #2268

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bacf0a9
fix: Deduplicate CSS files in content script build output
oc-wonton Apr 15, 2026
eec9583
Merge branch 'main' into fix/content-script-css-dedup-1987
PatrykKuniczak Apr 24, 2026
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35 changes: 35 additions & 0 deletions packages/wxt/e2e/tests/output-structure.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -291,6 +291,41 @@ describe('Output Directory Structure', () => {
`);
});

it('should not duplicate content script CSS in assets/ directory', async () => {
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@aklinker1 aklinker1 Apr 26, 2026

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Ran this test on main, it already passes

const project = new TestProject();
project.addFile(
'entrypoints/content.content/index.ts',
`import './style.css';
export default defineContentScript({
matches: ["*://*/*"],
main: () => {},
})`,
);
project.addFile(
'entrypoints/content.content/style.css',
`body { color: blue; }`,
);

await project.build();

// Verify CSS only exists in content-scripts/, not in assets/
expect(
await project.pathExists(
'.output/chrome-mv3/content-scripts/content.css',
),
).toBe(true);
expect(
await project.pathExists('.output/chrome-mv3/assets/content.css'),
).toBe(false);

// Verify the manifest references the correct CSS file
const manifest = await project.serializeFile(
'.output/chrome-mv3/manifest.json',
);
expect(manifest).toContain('content-scripts/content.css');
expect(manifest).not.toContain('assets/content.css');
});

it("should output to a custom directory when overriding 'outDir'", async () => {
const project = new TestProject();
project.addFile('entrypoints/unlisted.html', '<html></html>');
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