[bug] React refresh won't work if base was set other than default /.

[Ynewtime]

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• Read the docs.
• Use Vite >=2.0. (1.x is no longer supported)
• If the issue is related to 1.x -> 2.0 upgrade, read the Migration Guide first.

Describe the bug

If base was configured, like /sub/, react refresh won't work.

Reproduction

Repo to reproduce.

System Info

• vite version: 2.0.0-beta.56
• Operating System: Windows 10 20H2 19042.685
• Node version: v15.6.0
• Package manager (npm/yarn/pnpm) and version: yarn 1.22.10

Logs (Optional if provided reproduction)

vite:config bundled config file loaded in 123ms +0ms
  vite:config using resolved config: {
  vite:config   base: '/sub/',
  vite:config   plugins: [
  vite:config     'vite:pre-alias',
  vite:config     'alias',
  vite:config     'vite:dynamic-import-polyfill',
  vite:config     'vite:resolve',
  vite:config     'vite:html',
  vite:config     'vite:css',
  vite:config     'vite:esbuild',
  vite:config     'vite:json',
  vite:config     'vite:wasm',
  vite:config     'vite:worker',
  vite:config     'vite:asset',
  vite:config     'react-refresh',
  vite:config     'vite:css-post',
  vite:config     'vite:client-inject',
  vite:config     'vite:import-analysis'
  vite:config   ],
  vite:config   server: {},
  vite:config   configFile: '/home/ubuntu-y/dev/vite-project/vite.config.ts',
  vite:config   inlineConfig: {
  vite:config     root: undefined,
  vite:config     base: undefined,
  vite:config     mode: undefined,
  vite:config     configFile: undefined,
  vite:config     logLevel: undefined,
  vite:config     clearScreen: undefined,
  vite:config     server: {}
  vite:config   },
  vite:config   root: '/home/ubuntu-y/dev/vite-project',
  vite:config   command: 'serve',
  vite:config   mode: 'development',
  vite:config   isProduction: false,
  vite:config   optimizeCacheDir: '/home/ubuntu-y/dev/vite-project/node_modules/.vite',
  vite:config   alias: [ { find: /^\/@vite\//, replacement: [Function: replacement] } ],
  vite:config   build: {
  vite:config     target: [ 'es2019', 'edge16', 'firefox60', 'chrome61', 'safari11' ],
  vite:config     polyfillDynamicImport: true,
  vite:config     outDir: 'dist',
  vite:config     assetsDir: 'assets',
  vite:config     assetsInlineLimit: 4096,
  vite:config     cssCodeSplit: true,
  vite:config     sourcemap: false,
  vite:config     rollupOptions: {},
  vite:config     commonjsOptions: { include: [Array], extensions: [Array] },
  vite:config     minify: 'terser',
  vite:config     terserOptions: {},
  vite:config     cleanCssOptions: {},
  vite:config     write: true,
  vite:config     emptyOutDir: null,
  vite:config     manifest: false,
  vite:config     lib: false,
  vite:config     ssr: false,
  vite:config     ssrManifest: false
  vite:config   },
  vite:config   env: { BASE_URL: '/sub/', MODE: 'development', DEV: true, PROD: false },
  vite:config   assetsInclude: [Function: assetsInclude],
  vite:config   logger: {
  vite:config     hasWarned: false,
  vite:config     info: [Function: info],
  vite:config     warn: [Function: warn],
  vite:config     error: [Function: error],
  vite:config     clearScreen: [Function: clearScreen]
  vite:config   },
  vite:config   createResolver: [Function: createResolver]
  vite:config } +4ms
  vite:deps Crawling dependencies using entries:
  vite:deps   /home/ubuntu-y/dev/vite-project/index.html +0ms
  vite:resolve 1ms   /src/main.tsx -> /home/ubuntu-y/dev/vite-project/src/main.tsx +0ms
  vite:resolve 6ms   react -> /home/ubuntu-y/dev/vite-project/node_modules/react/index.js +10ms
  vite:resolve 3ms   react-dom -> /home/ubuntu-y/dev/vite-project/node_modules/react-dom/index.js +4ms
  vite:resolve 2ms   ./App -> /home/ubuntu-y/dev/vite-project/src/App.tsx +3ms
  vite:deps Scan completed in 94ms: {
  react: '/home/ubuntu-y/dev/vite-project/node_modules/react/index.js',
  'react-dom': '/home/ubuntu-y/dev/vite-project/node_modules/react-dom/index.js'
} +66ms
Pre-bundling dependencies:
react, react-dom
(this will be run only when your dependencies or config have changed)
  vite:resolve 1ms   object-assign -> null +0ms
  vite:resolve 5ms   object-assign -> /home/ubuntu-y/dev/vite-project/node_modules/object-assign/index.js +0ms
  vite:resolve 0ms   scheduler -> null +54ms
  vite:resolve 4ms   scheduler -> /home/ubuntu-y/dev/vite-project/node_modules/scheduler/index.js +49ms
  vite:resolve 0ms   scheduler/tracing -> null +4ms
  vite:resolve 1ms   scheduler/tracing -> /home/ubuntu-y/dev/vite-project/node_modules/scheduler/tracing.js +2ms
  vite:deps deps bundled in 168ms +0ms

  ⚡Vite dev server running at:

  > Local:    http://localhost:3000/sub/
  > Network:  http://100.65.74.141:3000/sub/

  ready in 529ms.

[yyx990803]

fixed in @vitejs/plugin-react-refresh@1.1.3