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Enable URL rewriting for PostCSS
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‎CHANGELOG.md‎

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@@ -17,6 +17,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
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- _Experimental_: Add `user-valid` and `user-invalid` variants ([#12370](https://github.com/tailwindlabs/tailwindcss/pull/12370))
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- _Experimental_: Add `wrap-anywhere`, `wrap-break-word`, and `wrap-normal` utilities ([#12128](https://github.com/tailwindlabs/tailwindcss/pull/12128))
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### Fixed
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- Vite: Fix an issue where `url(…)` rebasing in transitively imported CSS files is not resolved correctly
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- PostCSS: Rebase `url(…)` in CSS imported CSS files
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## [4.0.11] - 2025-03-06
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### Fixed

‎integrations/postcss/url-rewriting.test.ts‎

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import { binary, css, js, json, svg, test } from '../utils'
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const SIMPLE_IMAGE = `iVBORw0KGgoAAAANSUhEUgAAADAAAAAlAQAAAAAsYlcCAAAACklEQVR4AWMYBQABAwABRUEDtQAAAABJRU5ErkJggg==`
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test.debug(
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'can rewrite urls in production builds',
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{
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fs: {
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'package.json': json`
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{
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"dependencies": {
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"postcss": "^8",
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"postcss-cli": "^10",
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"tailwindcss": "workspace:^",
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"@tailwindcss/postcss": "workspace:^"
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}
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}
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`,
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'postcss.config.js': js`
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module.exports = {
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plugins: {
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'@tailwindcss/postcss': {},
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},
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}
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`,
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'src/index.css': css`
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@reference 'tailwindcss';
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@import './dir-1/bar.css';
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@import './dir-1/dir-2/baz.css';
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@import './dir-1/dir-2/vector.css';
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`,
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'src/dir-1/bar.css': css`
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.test1 {
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background-image: url('../../resources/image.png');
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}
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`,
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'src/dir-1/dir-2/baz.css': css`
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.test2 {
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background-image: url('../../../resources/image.png');
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}
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`,
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'src/dir-1/dir-2/vector.css': css`
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@import './dir-3/vector.css';
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.test3 {
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background-image: url('../../../resources/vector.svg');
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}
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`,
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'src/dir-1/dir-2/dir-3/vector.css': css`
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.test4 {
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background-image: url('./vector-2.svg');
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}
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`,
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'resources/image.png': binary(SIMPLE_IMAGE),
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'resources/vector.svg': svg`
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<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg">
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<rect width="100%" height="100%" fill="red" />
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<circle cx="200" cy="100" r="80" fill="green" />
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<rect width="100%" height="100%" fill="red" />
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<circle cx="200" cy="100" r="80" fill="green" />
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</svg>
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`,
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'src/dir-1/dir-2/dir-3/vector-2.svg': svg`
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<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg">
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<rect width="100%" height="100%" fill="blue" />
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<circle cx="200" cy="100" r="80" fill="green" />
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<rect width="100%" height="100%" fill="red" />
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<circle cx="200" cy="100" r="80" fill="pink" />
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</svg>
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`,
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},
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},
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async ({ fs, exec, expect }) => {
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await exec('pnpm postcss src/index.css --output dist/out.css')
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expect(await fs.dumpFiles('dist/out.css')).toMatchInlineSnapshot(`
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"
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--- dist/out.css ---
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.test1 {
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background-image: url('../resources/image.png');
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}
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.test2 {
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background-image: url('../resources/image.png');
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}
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.test4 {
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background-image: url('./dir-1/dir-2/dir-3/vector-2.svg');
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}
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.test3 {
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background-image: url('../resources/vector.svg');
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}
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"
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`)
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},
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)

‎integrations/vite/url-rewriting.test.ts‎

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@@ -42,31 +42,36 @@ describe.each(['postcss', 'lightningcss'])('%s', (transformer) => {
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</head>
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<body>
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<div id="app"></div>
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<script type="module" src="./src/main.ts"></script>
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</body>
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</html>
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`,
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'src/main.ts': ts``,
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'src/app.css': css`
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@reference 'tailwindcss';
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@import './dir-1/bar.css';
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@import './dir-1/dir-2/baz.css';
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@import './dir-1/dir-2/vector.css';
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`,
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'src/dir-1/bar.css': css`
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.bar {
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.test1 {
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background-image: url('../../resources/image.png');
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}
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`,
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'src/dir-1/dir-2/baz.css': css`
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.baz {
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.test2 {
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background-image: url('../../../resources/image.png');
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}
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`,
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'src/dir-1/dir-2/vector.css': css`
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.baz {
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@import './dir-3/vector.css';
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.test3 {
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background-image: url('../../../resources/vector.svg');
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}
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`,
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'src/dir-1/dir-2/dir-3/vector.css': css`
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.test4 {
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background-image: url('./vector-2.svg');
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}
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`,
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'resources/image.png': binary(SIMPLE_IMAGE),
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'resources/vector.svg': svg`
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<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg">
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<circle cx="200" cy="100" r="80" fill="green" />
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</svg>
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`,
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'src/dir-1/dir-2/dir-3/vector-2.svg': svg`
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<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg">
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<rect width="100%" height="100%" fill="blue" />
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<circle cx="200" cy="100" r="80" fill="green" />
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<rect width="100%" height="100%" fill="red" />
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<circle cx="200" cy="100" r="80" fill="pink" />
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</svg>
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`,
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},
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},
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async ({ fs, exec, expect }) => {
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await fs.expectFileToContain(files[0][0], [SIMPLE_IMAGE])
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let images = await fs.glob('dist/**/*.svg')
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expect(images).toHaveLength(1)
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expect(images).toHaveLength(2)
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await fs.expectFileToContain(files[0][0], [/\/assets\/vector-.*?\.svg/])
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},

‎packages/@tailwindcss-node/src/compile.ts‎

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@@ -40,8 +40,8 @@ function createCompileOptions({
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async loadModule(id: string, base: string) {
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return loadModule(id, base, onDependency, customJsResolver)
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},
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async loadStylesheet(id: string, base: string) {
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let sheet = await loadStylesheet(id, base, onDependency, customCssResolver)
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async loadStylesheet(id: string, sheetBase: string) {
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let sheet = await loadStylesheet(id, sheetBase, onDependency, customCssResolver)
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if (shouldRewriteUrls) {
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sheet.content = await rewriteUrls({

‎packages/@tailwindcss-postcss/src/index.ts‎

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@@ -110,6 +110,7 @@ function tailwindcss(opts: PluginOptions = {}): AcceptedPlugin {
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DEBUG && I.start('Create compiler')
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let compiler = await compileAst(ast, {
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base: inputBasePath,
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shouldRewriteUrls: true,
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onDependency: (path) => {
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context.fullRebuildPaths.push(path)
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},

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