fix(vue3-mp): export defineComponent...

packages/uni-mp-vue/dist/vue.runtime.esm.js

-import { isSymbol, extend, isMap, isObject, toRawType, def, isArray, isString, isFunction, isPromise, toHandlerKey, remove, EMPTY_OBJ, NOOP, isGloballyWhitelisted, isIntegerKey, hasOwn, hasChanged, capitalize, NO, invokeArrayFns, isSet, makeMap, toNumber, hyphenate, camelize, isReservedProp, EMPTY_ARR, toTypeString, isOn } from '@vue/shared';
+import { isSymbol, extend, isMap, isObject, toRawType, def, isArray, isString, isFunction, isPromise, capitalize, toHandlerKey, remove, EMPTY_OBJ, NOOP, isGloballyWhitelisted, isIntegerKey, hasOwn, hasChanged, camelize, NO, invokeArrayFns, isSet, makeMap, toNumber, hyphenate, isReservedProp, EMPTY_ARR, toTypeString, isOn } from '@vue/shared';
 export { camelize } from '@vue/shared';
 
 const targetMap = new WeakMap();
@@ -1366,6 +1366,57 @@ let currentRenderingInstance = null;
 function markAttrsAccessed() {
 }
 
+const COMPONENTS = 'components';
+const DIRECTIVES = 'directives';
+/**
+ * @private
+ */
+function resolveDirective(name) {
+    return resolveAsset(DIRECTIVES, name);
+}
+// implementation
+function resolveAsset(type, name, warnMissing = true) {
+    const instance =  currentInstance;
+    if (instance) {
+        const Component = instance.type;
+        // self name has highest priority
+        if (type === COMPONENTS) {
+            // special self referencing call generated by compiler
+            // inferred from SFC filename
+            if (name === `_self`) {
+                return Component;
+            }
+            const selfName = Component.displayName || Component.name;
+            if (selfName &&
+                (selfName === name ||
+                    selfName === camelize(name) ||
+                    selfName === capitalize(camelize(name)))) {
+                return Component;
+            }
+        }
+        const res = 
+        // local registration
+        // check instance[type] first for components with mixin or extends.
+        resolve(instance[type] || Component[type], name) ||
+            // global registration
+            resolve(instance.appContext[type], name);
+        if ((process.env.NODE_ENV !== 'production') && warnMissing && !res) {
+            warn(`Failed to resolve ${type.slice(0, -1)}: ${name}`);
+        }
+        return res;
+    }
+    else if ((process.env.NODE_ENV !== 'production')) {
+        warn(`resolve${capitalize(type.slice(0, -1))} ` +
+            `can only be used in render() or setup().`);
+    }
+}
+function resolve(registry, name) {
+    return (registry &&
+        (registry[name] ||
+            registry[camelize(name)] ||
+            registry[capitalize(camelize(name))]));
+}
+
 function initProps(instance, rawProps, isStateful, // result of bitwise flag comparison
 isSSR = false) {
     const props = {};
@@ -1798,6 +1849,15 @@ function validateDirectiveName(name) {
     if (isBuiltInDirective(name)) {
         warn('Do not use built-in directive ids as custom directive id: ' + name);
     }
+}
+/**
+ * Adds directives to a VNode.
+ */
+function withDirectives(vnode, directives) {
+    {
+        (process.env.NODE_ENV !== 'production') && warn(`withDirectives can only be used inside render functions.`);
+        return vnode;
+    }
 }
 
 function createAppContext() {
@@ -1928,6 +1988,11 @@ function createAppAPI() {
     };
 }
 
+// implementation, close to no-op
+function defineComponent(options) {
+    return isFunction(options) ? { setup: options, name: options.name } : options;
+}
+
 const queuePostRenderEffect =  queuePostFlushCb;
 
 // Simple effect.
@@ -3158,6 +3223,25 @@ function computed$1(getterOrOptions) {
     return c;
 }
 
+// implementation
+function defineProps() {
+    if ((process.env.NODE_ENV !== 'production')) {
+        warn(`defineProps() is a compiler-hint helper that is only usable inside ` +
+            `<script setup> of a single file component. Its arguments should be ` +
+            `compiled away and passing it at runtime has no effect.`);
+    }
+    return null;
+}
+// implementation
+function defineEmit() {
+    if ((process.env.NODE_ENV !== 'production')) {
+        warn(`defineEmit() is a compiler-hint helper that is only usable inside ` +
+            `<script setup> of a single file component. Its arguments should be ` +
+            `compiled away and passing it at runtime has no effect.`);
+    }
+    return null;
+}
+
 // Core API ------------------------------------------------------------------
 const version = "3.0.3";
 
@@ -3685,4 +3769,4 @@ function createApp(rootComponent, rootProps = null) {
     return createVueApp(rootComponent, rootProps).use(plugin);
 }
 
-export { callWithAsyncErrorHandling, callWithErrorHandling, computed$1 as computed, createApp, createHook$1 as createHook, createVueApp, customRef, inject, injectHook, isInSSRComponentSetup, isProxy, isReactive, isReadonly, isRef, logError, markRaw, nextTick, onActivated, onAddToFavorites, onBackPress, onBeforeMount, onBeforeUnmount, onBeforeUpdate, onDeactivated, onError, onErrorCaptured, onHide, onLaunch, onLoad, onMounted, onNavigationBarButtonTap, onNavigationBarSearchInputChanged, onNavigationBarSearchInputClicked, onNavigationBarSearchInputConfirmed, onNavigationBarSearchInputFocusChanged, onPageNotFound, onPageScroll, onPullDownRefresh, onReachBottom, onReady, onRenderTracked, onRenderTriggered, onResize, onShareAppMessage, onShareTimeline, onShow, onTabItemTap, onThemeChange, onUnhandledRejection, onUnload, onUnmounted, onUpdated, provide, reactive, readonly, ref, shallowReactive, shallowReadonly, shallowRef, toRaw, toRef, toRefs, triggerRef, unref, version, warn, watch, watchEffect };
+export { callWithAsyncErrorHandling, callWithErrorHandling, computed$1 as computed, createApp, createHook$1 as createHook, createVueApp, customRef, defineComponent, defineEmit, defineProps, inject, injectHook, isInSSRComponentSetup, isProxy, isReactive, isReadonly, isRef, logError, markRaw, nextTick, onActivated, onAddToFavorites, onBackPress, onBeforeMount, onBeforeUnmount, onBeforeUpdate, onDeactivated, onError, onErrorCaptured, onHide, onLaunch, onLoad, onMounted, onNavigationBarButtonTap, onNavigationBarSearchInputChanged, onNavigationBarSearchInputClicked, onNavigationBarSearchInputConfirmed, onNavigationBarSearchInputFocusChanged, onPageNotFound, onPageScroll, onPullDownRefresh, onReachBottom, onReady, onRenderTracked, onRenderTriggered, onResize, onShareAppMessage, onShareTimeline, onShow, onTabItemTap, onThemeChange, onUnhandledRejection, onUnload, onUnmounted, onUpdated, provide, reactive, readonly, ref, resolveDirective, shallowReactive, shallowReadonly, shallowRef, toRaw, toRef, toRefs, triggerRef, unref, version, warn, watch, watchEffect, withDirectives };

packages/vue-cli-plugin-uni/lib/vue-loader.js

@@ -27,6 +27,9 @@ module.exports = function modifyVueLoader (webpackConfig, loaderOptions, compile
     .tap(options => Object.assign(options, vueLoader.options(loaderOptions, compilerOptions), cacheConfig))
     .end()
 
+  // 强制使用vue2,vue3时会使用vue-loader-v16
+  webpackConfig.plugin('vue-loader').use(require(vueLoader.loader).VueLoaderPlugin)
+
   // h5 框架需要使用 scoped 样式,其他平台编译时识别是否 nvue 文件且注入 flex 相关样式
   if (process.env.UNI_PLATFORM === 'h5') {
     webpackConfig.module