From ded43c971eb94e2a597cbf19b67461a3f936c380 Mon Sep 17 00:00:00 2001
From: sapphi-red <green@sapphi.red>
Date: Wed, 16 Aug 2023 21:27:21 +0900
Subject: [PATCH] feat(css): stop injecting `?used`

---
 .../src/node/plugins/importAnalysisBuild.ts   | 25 +------------------
 playground/css/__tests__/css.spec.ts          |  6 +----
 2 files changed, 2 insertions(+), 29 deletions(-)

diff --git a/packages/vite/src/node/plugins/importAnalysisBuild.ts b/packages/vite/src/node/plugins/importAnalysisBuild.ts
index 1d046eb49f581e..b602de8c4c760d 100644
--- a/packages/vite/src/node/plugins/importAnalysisBuild.ts
+++ b/packages/vite/src/node/plugins/importAnalysisBuild.ts
@@ -7,7 +7,6 @@ import colors from 'picocolors'
 import type { RawSourceMap } from '@ampproject/remapping'
 import convertSourceMap from 'convert-source-map'
 import {
-  bareImportRE,
   cleanUrl,
   combineSourcemaps,
   generateCodeFrame,
@@ -23,8 +22,7 @@ import type { ResolvedConfig } from '../config'
 import { toOutputFilePathInJS } from '../build'
 import { genSourceMapUrl } from '../server/sourcemap'
 import { getDepsOptimizer, optimizedDepNeedsInterop } from '../optimizer'
-import { SPECIAL_QUERY_RE } from '../constants'
-import { isCSSRequest, removedPureCssFilesCache } from './css'
+import { removedPureCssFilesCache } from './css'
 import { interopNamedImports } from './importAnalysis'
 
 /**
@@ -379,27 +377,6 @@ export function buildImportAnalysisPlugin(config: ResolvedConfig): Plugin {
             }
           }
         }
-
-        // Differentiate CSS imports that use the default export from those that
-        // do not by injecting a ?used query - this allows us to avoid including
-        // the CSS string when unnecessary (esbuild has trouble tree-shaking
-        // them)
-        if (
-          specifier &&
-          isCSSRequest(specifier) &&
-          // always inject ?used query when it is a dynamic import
-          // because there is no way to check whether the default export is used
-          (source.slice(expStart, start).includes('from') || isDynamicImport) &&
-          // already has ?used query (by import.meta.glob)
-          !specifier.match(/\?used(&|$)/) &&
-          // don't append ?used when SPECIAL_QUERY_RE exists
-          !specifier.match(SPECIAL_QUERY_RE) &&
-          // edge case for package names ending with .css (e.g normalize.css)
-          !(bareImportRE.test(specifier) && !specifier.includes('/'))
-        ) {
-          const url = specifier.replace(/\?|$/, (m) => `?used${m ? '&' : ''}`)
-          str().update(start, end, isDynamicImport ? `'${url}'` : url)
-        }
       }
 
       if (
diff --git a/playground/css/__tests__/css.spec.ts b/playground/css/__tests__/css.spec.ts
index a08f50763d88f5..a33377295faf29 100644
--- a/playground/css/__tests__/css.spec.ts
+++ b/playground/css/__tests__/css.spec.ts
@@ -452,11 +452,7 @@ test("relative path rewritten in Less's data-uri", async () => {
 test('PostCSS source.input.from includes query', async () => {
   const code = await page.textContent('.postcss-source-input')
   // should resolve assets
-  expect(code).toContain(
-    isBuild
-      ? '/postcss-source-input.css?used&inline&query=foo'
-      : '/postcss-source-input.css?inline&query=foo',
-  )
+  expect(code).toContain('/postcss-source-input.css?inline&query=foo')
 })
 
 test('aliased css has content', async () => {