bus $on

通过事件总线bus传值\

再main.js里首先声明
Vue.prototype.$bus=new Vue();

// 父组件
<template>
    <div>
        <child1></child1>
        <child2></child2>
    </div>
</template>

<script>
import child1 from './userChild/child1'
import child2 from './userChild/child2'
export default {
    components:{
        child1,
        child2
    },
    data(){
        return {
            value:'',
        }
    },
}
</script>

//子组件1
<template>
    <div class="child1">
        子组件1
        <div>
            <el-input v-model="value"></el-input>
            <el-button @click="submit">提交</el-button>
        </div>
    </div>
</template>
<script>
export default {
    data(){
        return{
            value:''
        }
    },
    methods:{
        submit(){
            this.$bus.$emit('name',this.value)
        }
    }
}
</script>
<style lang="scss" scoped>
    .child1{
        width: 700px;
        height: 100px;
        margin: 10px;
        border: 1px solid #333;
        .el-input{
            width: 200px;
        }
    }
</style>

<template>
    <div class="child2">
        子组件2
        <div>
            {{value}} 提交了申请
        </div>
    </div>
</template>
<script>
export default {
    data(){
        return{
            value:''
        }
    },
    mounted(){
        this.$bus.$on('name',(value)=>{
            this.value=value;
        })
    }
}
</script>
<style lang="scss" scoped>
    .child2{
        width: 700px;
        height: 60px;
        margin: 10px;
        border: 1px solid #333;
    }
</style>