fix(uni.scss): 条件编译变量无效 (question/162271)

packages/vite-plugin-uni/src/config/css.ts

@@ -2,6 +2,7 @@ import path from 'path'
 import fs from 'fs-extra'
 import { UserConfig } from 'vite'
 import { VitePluginUniResolvedOptions } from '..'
+import { preCss } from '@dcloudio/uni-cli-shared'
 
 function resolveAdditionalData(inputDir: string, config: UserConfig) {
   const uniScssFile = path.resolve(inputDir, 'uni.scss')
@@ -10,7 +11,9 @@ function resolveAdditionalData(inputDir: string, config: UserConfig) {
   if (!fs.existsSync(uniScssFile)) {
     return userAdditionalData
   }
-  return fs.readFileSync(uniScssFile, 'utf8') + '\n' + userAdditionalData
+  return (
+    preCss(fs.readFileSync(uniScssFile, 'utf8')) + '\n' + userAdditionalData
+  )
 }
 
 export function createCss(