Vue:从Vue实例更新组件数据

Question

我想从我的Vue实例更新组件中的数据.找到关于如何做相反事情的大量例子,但没有任何内容.

说我有:

Vue.component('component', {
props: {
    prop: {
        default: null
    }
},
template: '#template',
data: function () {
    return {
        open: false
    };
}
});

现在,我想设置open到true从我的Vue的实例:

var root = new Vue({
    el: '#root',
    data: {},
    methods: { updateComponentData: function() {//set open to true} } });

Answer 1

你应该能够使用Child Component Ref.

<script type="text/x-template" id="template" ref="component">
    <div>Hello, {{ name }}!</div>
</script>

var root = new Vue({
  el: '#root',
  data: {},
  methods: { 
    updateComponentData: function() {
      this.$refs.component.open = true
    } 
  } 
});

工作实例

const Child = Vue.component('child', {
  template: `
    <div>
      <h2>Component1</h2>
      <div>Hello, {{ title }}! <strong>{{ open }}<strong></div>
    </div>
  `,
  data() {
    return {
      title: 'component',
      open: false
    }
  }
});

var root = new Vue({
  el: '#app',
  components: {
    Child
  },
  methods: { 
    updateComponentData: function() {
      //console.log('updateComponentData', this.$refs)
      this.$refs.component1.open = true
    } 
  } 
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.3.4/vue.min.js"></script>

<div id="app">
  <h2>Parent</h2>
  <button v-on:click="updateComponentData">Click me true</button>
  <child ref="component1"></child>
</div>