fix(app): v-model (#3107)

packages/uni-app-plus/src/view/framework/dom/components/UniComponent.ts

@@ -232,3 +232,15 @@ export function setHolderText(holder: Element, clazz: string, text: string) {
   // 添加文本节点
   holder.appendChild(document.createTextNode(text))
 }
+
+const vModelNames = ['value', 'modelValue']
+export function initVModel(props: Record<string, any>) {
+  vModelNames.forEach((name) => {
+    if (hasOwn(props, name)) {
+      const event = 'onUpdate:' + name
+      if (!hasOwn(props, event)) {
+        props[event] = (v: string) => (props[name] = v)
+      }
+    }
+  })
+}

packages/uni-app-plus/src/view/framework/dom/components/UniInput.ts

 import '@dcloudio/uni-components/style/input.css'
 import { Input } from '@dcloudio/uni-components'
 import { UniNodeJSON } from '@dcloudio/uni-shared'
-import { UniComponent } from './UniComponent'
+import { initVModel, UniComponent } from './UniComponent'
 
 export class UniInput extends UniComponent {
   constructor(
@@ -12,4 +12,8 @@ export class UniInput extends UniComponent {
   ) {
     super(id, 'uni-input', Input, parentNodeId, refNodeId, nodeJson)
   }
+  init(nodeJson: Partial<UniNodeJSON>): void {
+    super.init(nodeJson)
+    initVModel(this.$props)
+  }
 }

packages/uni-app-plus/src/view/framework/dom/components/UniTextarea.ts

 import '@dcloudio/uni-components/style/textarea.css'
 import { Textarea } from '@dcloudio/uni-components'
 import { UniNodeJSON } from '@dcloudio/uni-shared'
-import { UniComponent } from './UniComponent'
+import { initVModel, UniComponent } from './UniComponent'
 
 export class UniTextarea extends UniComponent {
   constructor(
@@ -12,4 +12,9 @@ export class UniTextarea extends UniComponent {
   ) {
     super(id, 'uni-textarea', Textarea, parentNodeId, refNodeId, nodeJson)
   }
+
+  init(nodeJson: Partial<UniNodeJSON>): void {
+    super.init(nodeJson)
+    initVModel(this.$props)
+  }
 }