fix(plugin-vue): respect hmr: false server config, fix #2790 (#2797)

Author: haoqunjiang

packages/plugin-vue/src/main.ts

@@ -114,7 +114,12 @@ export async function transformMain(
   output.push('export default _sfc_main')
 
   // HMR
-  if (devServer && !ssr && !isProduction) {
+  if (
+    devServer &&
+    devServer.config.server.hmr !== false &&
+    !ssr &&
+    !isProduction
+  ) {
     output.push(`_sfc_main.__hmrId = ${JSON.stringify(descriptor.id)}`)
     output.push(
       `typeof __VUE_HMR_RUNTIME__ !== 'undefined' && ` +

packages/plugin-vue/src/template.ts

@@ -20,7 +20,12 @@ export function transformTemplateAsModule(
   const result = compile(code, descriptor, options, pluginContext, ssr)
 
   let returnCode = result.code
-  if (options.devServer && !ssr && !options.isProduction) {
+  if (
+    options.devServer &&
+    options.devServer.config.server.hmr !== false &&
+    !ssr &&
+    !options.isProduction
+  ) {
     returnCode += `\nimport.meta.hot.accept(({ render }) => {
       __VUE_HMR_RUNTIME__.rerender(${JSON.stringify(descriptor.id)}, render)
     })`