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[WIP] Migrate project from PostCSS to Lightning CSS #13

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Merged
nichoth merged 3 commits into from
Jan 23, 2026
Merged

[WIP] Migrate project from PostCSS to Lightning CSS #13

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2e0f552
Initial plan
Copilot Jan 23, 2026
20ade5b
Migrate from PostCSS to Lightning CSS
Copilot Jan 23, 2026
fcecc48
Add lightningcss package for Vite integration
Copilot Jan 23, 2026
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13 changes: 5 additions & 8 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -31,8 +31,8 @@
"test": "npm run build && npm run build-tests && npm run test-tape-run",
"test-tape-run": "cat test/index.html | tape-run --input=html --static=test | tap-spec",
"build-tests": "esbuild test/index.ts --target=es2020 --bundle --keep-names > test/test-bundle.js",
"build-css": "postcss src/index.css --use postcss-nesting > dist/index.css",
"build-css:min": "postcss src/index.css --use cssnano postcss-nesting > dist/index.min.css",
"build-css": "lightningcss --nesting --bundle --targets '>= 0.25%' src/index.css -o dist/index.css",
"build-css:min": "lightningcss --nesting --bundle --minify --targets '>= 0.25%' src/index.css -o dist/index.min.css",
"build-cjs": "esbuild src/*.ts --format=cjs --keep-names --tsconfig=tsconfig.build.json --outdir=./dist --out-extension:.js=.cjs --sourcemap",
"build-esm": "esbuild src/*.ts --format=esm --metafile=dist/meta.json --keep-names --tsconfig=tsconfig.build.json --outdir=./dist --sourcemap && tsc --emitDeclarationOnly --project tsconfig.build.json --outDir dist",
"build-esm:min": "esbuild ./src/*.ts --format=esm --keep-names --bundle --tsconfig=tsconfig.build.json --minify --out-extension:.js=.min.js --outdir=./dist --sourcemap",
Expand All @@ -46,22 +46,19 @@
"postversion": "git push --follow-tags && export $(cat .env | xargs) && npm publish",
"prepublishOnly": "npm run build"
},
"dependencies": {},
"devDependencies": {
"@substrate-system/dom": "^0.1.7",
"@substrate-system/debug": "^0.9.0",
"@substrate-system/dom": "^0.1.7",
"@substrate-system/tapzero": "^0.10.13",
"@typescript-eslint/eslint-plugin": "^8.7.0",
"@typescript-eslint/parser": "^8.7.0",
"auto-changelog": "^2.4.0",
"cssnano": "^7.0.3",
"esbuild": "^0.27.0",
"eslint": "^8.57.0",
"eslint-config-standard": "^17.1.0",
"lightningcss": "^1.31.1",
"lightningcss-cli": "^1.31.1",
"markdown-toc": "^1.2.0",
"postcss": "^8.5.1",
"postcss-cli": "^11.0.0",
"postcss-nesting": "^13.0.1",
"stylelint": "^16.9.0",
"stylelint-config-standard": "^39.0.0",
"tap-spec": "^5.0.0",
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12 changes: 6 additions & 6 deletions vite.config.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
import { defineConfig } from 'vite'
import postcssNesting from 'postcss-nesting'

// https://vitejs.dev/config/
export default defineConfig({
Expand All @@ -13,11 +12,12 @@ export default defineConfig({
},
publicDir: '_public',
css: {
postcss: {
plugins: [
postcssNesting
],
},
transformer: 'lightningcss',
lightningcss: {
drafts: {
nesting: true
}
}
},
server: {
port: 8888,
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