Vue中data数据初始化方法详解

Object.assign(this.$data, this.$options.data())
this.$data：当前的data数据（修改过后的）；
this.$options.data()：初始化的data数据；
Object.assign的作用就是把this.$options.data()的值赋值给this.$data;
// 表单初始化
this.form = this.$options.data().form
//  vue在创建页面是会把data数据绑定到option属性里，恢复只需要调用就可以了

<template>
  <div>
    <el-button @click="handleOpen">显示</el-button>
    <el-button @click="handleCls">隐藏</el-button>
    <Children ref="children" />
  </div>
</template>
<script>
import Children from './children.vue'
export default {
  name: 'Father',
  components: {
    Children
  },
  props: {
  },
  data() {
    return {
    }
  },
  methods: {
    handleOpen() {
      this.$refs.children.dialogFormVisible = true
      self.console.log(this.$refs.children.dialogFormVisible)
    },
    handleCls() {
      this.$refs.children.dialogFormVisible = false
    }
  }
}
</script>
<style lang="scss" scoped>
</style>

<template>
  <el-dialog v-if="dialogFormVisible" title="收货地址" :visible.sync="dialogFormVisible">
    <el-form :model="form">
      <el-form-item label="活动名称" :label-width="formLabelWidth">
        <el-input v-model="form.name" autocomplete="off" />
      </el-form-item>
      <el-form-item label="活动区域" :label-width="formLabelWidth">
        <el-select v-model="form.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai" />
          <el-option label="区域二" value="beijing" />
        </el-select>
      </el-form-item>
    </el-form>
    <div slot="footer" class="dialog-footer">
      <el-button @click="dialogFormVisible = false">取 消</el-button>
    </div>
  </el-dialog>
</template>
<script>
export default {
  components: {
  },
  data() {
    return {
      dialogFormVisible: false,
      form: {
        name: '',
        region: '',
        date1: '',
        date2: '',
        delivery: false,
        type: [],
        resource: '',
        desc: ''
      },
      formLabelWidth: '120px'
    }
  }
}
</script>
<style lang="scss" scoped>
</style>

<template>
  <div>
    <el-button @click="handleOpen">显示</el-button>
    <el-button @click="handleCls">隐藏</el-button>
    <Children v-if="dialogShow" ref="children" @handleClose="handleClose" />
  </div>
</template>
<script>
import Children from './children.vue'
export default {
  name: 'Father',
  components: {
    Children
  },
  props: {
  },
  data() {
    return {
      dialogShow: false
    }
  },
  methods: {
    handleOpen() {
      // this.$refs.children.dialogFormVisible = true
      this.dialogShow = true
      // self.console.log(this.$refs.children.dialogFormVisible)
    },
    handleCls() {
      this.dialogShow = false
      // this.$refs.children.dialogFormVisible = false
    },
    handleClose() {
      this.dialogShow = false
    }
  }
}
</script>
<style lang="scss" scoped>
</style>

<template>
  <el-dialog title="收货地址" :visible="true">
    <el-form :model="form">
      <el-form-item label="活动名称" :label-width="formLabelWidth">
        <el-input v-model="form.name" autocomplete="off" />
      </el-form-item>
      <el-form-item label="活动区域" :label-width="formLabelWidth">
        <el-select v-model="form.region" placeholder="请选择活动区域">
          <el-option label="区域一" value="shanghai" />
          <el-option label="区域二" value="beijing" />
        </el-select>
      </el-form-item>
    </el-form>
    <div slot="footer" class="dialog-footer">
      <el-button @click="handleClose">取 消</el-button>
    </div>
  </el-dialog>
</template>
<script>
export default {
  components: {
  },
  data() {
    return {
      dialogFormVisible: false,
      form: {
        name: '',
        region: '',
        date1: '',
        date2: '',
        delivery: false,
        type: [],
        resource: '',
        desc: ''
      },
      formLabelWidth: '120px'
    }
  },
  methods: {
    handleClose() {
      this.$emit('handleClose')
    }
  }
}
</script>
<style lang="scss" scoped>
</style>