fix(mp-weixin): input event of the textarea does not trigger on iOS (#3090)

packages/uni-mp-weixin/__tests__/component.spec.ts

@@ -17,6 +17,36 @@ describe('mp-weixin: transform component', () => {
       code,
       `(_ctx, _cache) => {
   return {}
+}`
+    )
+  })
+  test('lazy element: textarea', () => {
+    assert(
+      `<textarea></textarea>`,
+      `<textarea></textarea>`,
+      `(_ctx, _cache) => {
+  return {}
+}`
+    )
+    assert(
+      `<textarea @input="input"></textarea>`,
+      `<block wx:if="{{r0}}"><textarea bindinput="{{a}}"></textarea></block>`,
+      `(_ctx, _cache) => {
+  return { a: _o(_ctx.input) }
+}`
+    )
+    assert(
+      `<textarea v-model="text"></textarea>`,
+      `<block wx:if="{{r0}}"><textarea value="{{a}}" bindinput="{{b}}"></textarea></block>`,
+      `(_ctx, _cache) => {
+  return { a: _ctx.text, b: _o($event => _ctx.text = $event.detail.value) }
+}`
+    )
+    assert(
+      `<textarea v-if="ok1" @input="input"/><textarea v-else-if="ok2"/><textarea v-else @input="input"/>`,
+      `<textarea wx:if="{{a}}" bindinput="{{b}}"/><textarea wx:elif="{{c}}"/><block wx:else><textarea wx:if="{{r0}}" bindinput="{{d}}"/></block>`,
+      `(_ctx, _cache) => {
+  return _e({ a: _ctx.ok1 }, _ctx.ok1 ? { b: _o(_ctx.input) } : _ctx.ok2 ? {} : { d: _o(_ctx.input) }, { c: _ctx.ok2 })
 }`
     )
   })

packages/uni-mp-weixin/dist/uni.compiler.js

@@ -80,6 +80,8 @@ const miniProgram = {
     lazyElement: {
         canvas: [{ name: 'bind', arg: ['canvas-id', 'id'] }],
         editor: [{ name: 'on', arg: ['ready'] }],
+        // iOS 平台需要延迟
+        textarea: [{ name: 'on', arg: ['input'] }],
     },
     component: {
         dir: COMPONENTS_DIR,

packages/uni-mp-weixin/src/compiler/options.ts

@@ -36,6 +36,8 @@ export const miniProgram: MiniProgramCompilerOptions = {
   lazyElement: {
     canvas: [{ name: 'bind', arg: ['canvas-id', 'id'] }],
     editor: [{ name: 'on', arg: ['ready'] }],
+    // iOS 平台需要延迟
+    textarea: [{ name: 'on', arg: ['input'] }],
   },
   component: {
     dir: COMPONENTS_DIR,