Vue Component 子访问父组件 $parent

 

 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div id="app">
        <div_box ref="box"></div_box>
    </div>
    <template id="div_box">
        <div style="background-color: red;height: 200px;height: 200px;">
            <button-counter></button-counter>
        </div>
    </template>
    <template id="button_counter">
        <button @click="btnClick">btn_{{count}}</button>
    </template>
    <script src="js/vue.3.2.2.js"></script>
    <script>
        const Counter = {
            data(){
                return{
                    count: 0
                }
            },
            template:'#button_counter',
            methods:{
                btnClick() {
                    this.count++;
                    console.log("btnClick--$parent--"+this.$parent.msg);
                    console.log("btnClick--$parent.$parent--"+this.$parent.$parent.msg);
                    console.log("btnClick--$root--"+this.$root.msg);
                }
            }
        }
        const Box = {
            data(){
                return{
                    msg:"hello"
                }
            },
            components: {
                'button-counter':Counter
            },
            template:'#div_box'

        }
        // 1、创建Vue的实例对象
        const app = Vue.createApp({
            data(){//定义数据
                return {
                    msg:'你好！'
                }
            },
            components:{
                'div_box':Box//,
                // 'div_box2':Box2,
                // 'div_box3':Box3
            },
            methods: {

            }
        }).mount('#app');
    </script>
</body>
</html>

 

posted @ 2021-08-21 17:25  残星  阅读(249)  评论(0)    收藏  举报