Vue组件父子通信实例解析-优快云博客

父链

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
</head>

<body>
    <div id="demo">
        <child-assemly></child-assemly>
        {{msg}}
    </div>

    <script>
        //创建子组件
        Vue.component('child-assemly',{
            template:'<div><button @click="setparentdata">子组件</button></div>',
            methods:{
                setparentdata:function(){
                    //获取父级的父级 .$parent.$parent  依次类推 
                    this.$parent.msg='父组件内容已经被修改'
                }
            }
        })
        var app = new Vue({
            el: '#demo',
            data: {
                msg:'---父组件内容'
            }
        }) 
    </script>
</body>

</html>
复制代码

子链
单个子组件用this.children 使用方法同父链
多个子组件使用

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
</head>

<body>
    <div id="demo">
        <one-assemly ref='a'></one-assemly>
        <tow-assemly ref='b'> </tow-assemly>
        <three-assemly ref="c"></three-assemly>
        <button @click="parentassemly">{{msg}}</button>

    </div>

    <script>
        Vue.component('one-assemly',{
            template:'<div><button >子组件a</button></div>',
            data:function(){
                return{
                    msg:'one-assemly'
                }
            }
        })
        Vue.component('tow-assemly',{
            template:'<div><button >子组件b</button></div>',
            data:function(){
                return{
                    msg:'tow-assemly'
                }
            }
        })
        Vue.component('three-assemly',{
            template:'<div><button >子组件c</button></div>',
            data:function(){
                return{
                    msg:'three-assemly'
                }
            }
        })
        var app = new Vue({
            el: '#demo',
            data: {
                msg:'未拿到'
            },
            methods:{
                parentassemly:function(){
                    this.msg=this.$refs.c.msg
                }
            }

        }) 
    </script>
</body>

</html>
复制代码

父链/子链