child.vue

<template><div><el-button type="primary" @click.stop="$emit(`get`, data)">点击传参</el-button></div>
</template>
<script>
export default { name: "child", props: ["data"] };
</script>

demo

<template><child ref="child" :data="{}" />
</template>
<script>
import child from "@/vue/admin/demo/child";
export default {components: {child,},mounted() {this.$refs.child.$props.data.msg = `异步传输属性内容给子组件child`; //注意修改的数据一定要是对象类型，否则会报错Avoid mutatingthis.$refs.child.$on(`get`, this.get);},beforeDestroy() {this.$refs.child.$off(`get`, this.get);//记得要销毁哟，否则会很卡的！},methods: {get(d) {console.log(``, d.msg);},},
};
</script>