自定义组件上使用v-model监听

父组件

<template>
    <search v-model="keywords" placeholder="请输入查询内容"></search>
</template>

<script>
    import search from './search.vue'
    export default {
        components: {
            search
        },
        data() {
            return {
                keywords: ''
            }
        },
        watch: {
            keywords(val) {
                console.log(val, 'v-model监听的值')
            }
        }
    }
</script>

子组件

// search.vue

<template>
    <div class="search-box">
        <div class="search-content">
            <span class="icon-search"></span>
            <input type="text" v-model="currentValue" :placeholder="placeholder" :autofocus="autofocus" @click="isShow = true" @blur="outBlur">
            <a href="javascript:;" @click="isShow = false, currentValue = ''" v-show="isShow">取消</a>
        </div>
    </div>
</template>

<script>
export default {
    props: {
        value: {
            type: String,
            default: ''
        },
        placeholder: {
            type: String,
            default: '请输入'
        },
        autofocus: {
            type: Boolean,
            default: false
        }
    },
    data() {
        return{
            currentValue: this.value,
            isShow: this.value ? true : false
        }
    },
    watch: {
        currentValue(val) {
            this.$emit('input', val)
            this.isShow = val
        },
        value(val) {
            this.currentValue = val
        }
    },
    methods: {
        outBlur() {
            if (!this.currentValue) {
                this.isShow = false
            }
        }
    }
}
</script>