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fix: Normalize CSS build environment #9860

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Merged
LFDanLu merged 3 commits into from
Mar 31, 2026
+9 −5
Merged

fix: Normalize CSS build environment #9860

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9fb57be
fix: Normalize CSS build environment
devongovett Mar 30, 2026
4453772
turn on verdaccio
devongovett Mar 30, 2026
f54c514
Revert "turn on verdaccio"
devongovett Mar 30, 2026
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1 change: 0 additions & 1 deletion .parcelrc
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,6 @@
"*.svg": ["@parcel/transformer-svg-react"],
"packages/@react-aria/example-theme/**/*.css": ["@parcel/transformer-css"],
"starters/docs/src/*.css": ["@parcel/transformer-css"],
"*.css": ["...", "parcel-transformer-css-env"],
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@devongovett devongovett Mar 30, 2026

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not needed anymore for old v3 docs, the default CSS transformer in parcel now handles this. I repurposed this plugin as above to handle the issue with the build.

"*.{js,mjs,jsm,jsx,es6,cjs,ts,tsx}": [
"@parcel/transformer-js",
"@parcel/transformer-react-refresh-wrap"
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13 changes: 9 additions & 4 deletions packages/dev/parcel-transformer-css-env/CSSEnvTransformer.js
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Expand Up @@ -15,15 +15,20 @@ const {Transformer} = require('@parcel/plugin');
module.exports = new Transformer({
async transform({asset, options}) {
// Normalize CSS so it always has the same environment and isn't duplicated.
// This is necessary because the server bundle has a "node" environment, whereas
// the client bundle has a "browser" environment. We want them to end up resolving
// to the same asset.
// This is so the legacy JS bundle and the modern JS bundle share the same CSS.
asset.setEnvironment({
context: 'browser',
engines: {
browsers: 'baseline widely available'
},
shouldOptimize: asset.env.shouldOptimize
shouldOptimize: asset.env.shouldOptimize,
outputFormat: asset.env.outputFormat,
isLibrary: asset.env.isLibrary,
shouldScopeHoist: asset.env.shouldScopeHoist,
includeNodeModules: asset.env.includeNodeModules,
loc: asset.env.loc,
sourceMap: asset.env.sourceMap,
sourceType: asset.env.sourceType
});

return [asset];
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