fix(react-swc): fix @vitejs/plugin-react-swc/preamble on build (#962)

Author: HcySunYang

packages/plugin-react-swc/src/index.ts

@@ -75,7 +75,7 @@ type Options = {
 }
 
 const react = (_options?: Options): Plugin[] => {
-  let hmrDisabled = false
+  let hmrDisabled = true
   let viteCacheRoot: string | undefined
   const options = {
     jsxImportSource: _options?.jsxImportSource ?? 'react',
@@ -133,7 +133,7 @@ const react = (_options?: Options): Plugin[] => {
       }),
       configResolved(config) {
         viteCacheRoot = config.cacheDir
-        if (config.server.hmr === false) hmrDisabled = true
+        hmrDisabled = config.server.hmr === false
         const mdxIndex = config.plugins.findIndex(
           (p) => p.name === '@mdx-js/rollup',
         )