Vue 实现双向绑定的四种方法

<input
 :value="text"
 @input="e => text = e.target.value"
/>

<my-dialog :visible.sync="dialogVisible" />

<my-dialog
 :visible="dialogVisible"
 @update:visible="newVisible => dialogVisible = newVisible"
/>

{
 render(h) {
  return h('my-dialog', {
   props: { value: this.dialogVisible },
   on: { input: newVisible => this.dialogVisible = newVisible }
  })
 }
}

{
 render(h) {
  return h('my-dialog', {
   props: { visible: this.dialogVisible },
   on: { change: newVisible => this.dialogVisible = newVisible }
  })
 }
}

{
 render(h) {
  return h('my-dialog', {
   model: {
    value: this.dialogVisible,
    callback: newVisible => this.dialogVisible = newVisible
   }
  })
 }
}

{
 render() {
  return (
   <my-dialog
    {...{
     model: {
      value: this.dialogVisible,
      callback: newVisible => this.dialogVisible = newVisible
     }
    }}
   />
  )
 }
}

<template>
 <div v-show="_visible">
  <div>完善个人信息</div>
  <div>
   <div>尊姓大名？</div>
   <input v-model="_answer" />
  </div>
  <div>
   <button @click="_visible = !_visible">确认</button>
   <button @click="_visible = !_visible">取消</button>
  </div>
 </div>
</template>
<script>
export default {
 name: 'prompt',
 props: {
  answer: String,
  visible: Boolean
 },
 computed: {
  _answer: {
   get() {
    return this.answer
   },
   set(value) {
    this.$emit('input', value)
   }
  },
  _visible: {
   get() {
    return this.visible
   },
   set(value) {
    this.$emit('update:visible', value)
   }
  }
 }
}
</script>

<template>
 <div v-show="actualVisible">
  <div>完善个人信息</div>
  <div>
   <div>尊姓大名？</div>
   <input v-model="actualAnswer" />
  </div>
  <div>
   <button @click="syncVisible(!actualVisible)">确认</button>
   <button @click="syncVisible(!actualVisible)">取消</button>
  </div>
 </div>
</template>
<script>
import VueBetterSync from 'vue-better-sync'
export default {
 name: 'prompt',
 mixins: [
  VueBetterSync({
   prop: 'answer', // 设置 v-model 的 prop
   event: 'input' // 设置 v-model 的 event
  })
 ],
 props: {
  answer: String,
  visible: {
   type: Boolean,
   sync: true // visible 属性可用 .sync 双向绑定
  }
 }
}
</script>