refactor: use optional chaining in config define of vue-jsx (#8046)

Author: ydcjeff

packages/plugin-vue-jsx/index.js

@@ -48,21 +48,15 @@ function vueJsxPlugin(options = {}) {
     name: 'vite:vue-jsx',
 
     config(config) {
-      const optionsApi = config.define
-        ? config.define.__VUE_OPTIONS_API__
-        : undefined
-      const devTools = config.define
-        ? config.define.__VUE_PROD_DEVTOOLS__
-        : undefined
       return {
         // only apply esbuild to ts files
         // since we are handling jsx and tsx now
         esbuild: {
           include: /\.ts$/
         },
         define: {
-          __VUE_OPTIONS_API__: optionsApi != null ? optionsApi : true,
-          __VUE_PROD_DEVTOOLS__: devTools != null ? devTools : false
+          __VUE_OPTIONS_API__: config.define?.__VUE_OPTIONS_API__ ?? true,
+          __VUE_PROD_DEVTOOLS__: config.define?.__VUE_PROD_DEVTOOLS__ ?? false
         }
       }
     },