fix(build): fix mjs dual package hazard

close #12626

dist/vue.runtime.mjs

@@ -0,0 +1,75 @@
+import Vue from './vue.runtime.common.js'
+export default Vue
+
+// this should be kept in sync with src/v3/index.ts
+export const {
+  version,
+
+  // refs
+  ref,
+  shallowRef,
+  isRef,
+  toRef,
+  toRefs,
+  unref,
+  proxyRefs,
+  customRef,
+  triggerRef,
+  computed,
+
+  // reactive
+  reactive,
+  isReactive,
+  isReadonly,
+  isShallow,
+  isProxy,
+  shallowReactive,
+  markRaw,
+  toRaw,
+  readonly,
+  shallowReadonly,
+
+  // watch
+  watch,
+  watchEffect,
+  watchPostEffect,
+  watchSyncEffect,
+
+  // effectScope
+  effectScope,
+  onScopeDispose,
+  getCurrentScope,
+
+  // provide / inject
+  provide,
+  inject,
+
+  // lifecycle
+  onBeforeMount,
+  onMounted,
+  onBeforeUpdate,
+  onUpdated,
+  onUnmounted,
+  onErrorCaptured,
+  onActivated,
+  onDeactivated,
+  onServerPrefetch,
+  onRenderTracked,
+  onRenderTriggered,
+
+  // v2 only
+  set,
+  del,
+
+  // v3 compat
+  h,
+  getCurrentInstance,
+  useSlots,
+  useAttrs,
+  mergeDefaults,
+  nextTick,
+  useCssModule,
+  useCssVars,
+  defineComponent,
+  defineAsyncComponent
+} = Vue

scripts/config.js

@@ -71,13 +71,6 @@ const builds = {
     format: 'es',
     banner
   },
-  // Runtime only ES modules build (for Node)
-  'runtime-mjs': {
-    entry: resolve('web/entry-runtime-esm.ts'),
-    dest: resolve('dist/vue.runtime.mjs'),
-    format: 'es',
-    banner
-  },
   // Runtime+compiler ES modules build (for bundlers)
   'full-esm': {
     entry: resolve('web/entry-runtime-with-compiler-esm.ts'),

src/v3/index.ts

@@ -1,3 +1,7 @@
+/**
+ * Note: also update dist/vue.runtime.mjs when adding new exports to this file.
+ */
+
 export const version: string = '__VERSION__'
 
 export {