如下。 点击click无效
父组件：

 <self-search @changeValue="obj => { Object.assign(params, obj); }"></self-search>

子组件：

<template>
    <div>
        <button type="button" class="option-btn blue-btn ml20" @click="openDialog">高级搜索</button>
        
    </div>
</template>

<script>
    export default {
        name: "self-search",
        data (){
            return {
                selfDialog: {
                    isShow: false,
                    title: '高级搜素'
                },
                params: {

                }
            }
        },
        watch: {
            params (value){
                this.$emit("changeValue", value);
            }
        },
        methods: {
            openDialog (){
                //这里没有进来
                debugger;
            }
        }
    }
</script>