vue实现表格的更多查询功能

场景一：一行足够显示完所有的查询条件

场景二：需要多行才能显示完所有的查询条件 

 1.首先创建一个按钮组件SearchButton

<template>
    <el-form inline class="clearfix">
        <el-row class="leftSear" :style="`width:${show ? '100%' : ''};float:left`">
            <slot />
            <el-form-item v-show="show" style="float: right;">
                <el-button type="primary" icon="el-icon-search" size="mini" @click="searchClick">查询</el-button>
                <el-button icon="el-icon-refresh" size="mini" @click="resetClick">重置</el-button>
                <el-button v-if="!noMore" type="text" size="mini" @click="moreClick">更多查询<i
                        :class="show ? 'el-icon-arrow-down' : 'el-icon-arrow-up'"></i></el-button>
            </el-form-item>
        </el-row>
        <el-row :class="!show ? 'btnRow' : 'unBtnRow'" v-show="!show">
            <slot name="more"></slot>
            <el-form-item style="float: right;margin: 0;">
                <el-button type="primary" icon="el-icon-search" size="mini" @click="searchClick">查询</el-button>
                <el-button icon="el-icon-refresh" size="mini" @click="resetClick">重置</el-button>
                <el-button v-if="!noMore" type="text" size="mini" @click="moreClick">更多查询<i
                        :class="show ? 'el-icon-arrow-down' : 'el-icon-arrow-up'"></i></el-button>
            </el-form-item>
        </el-row>
    </el-form>
</template>
<script>
export default {
    data() {
        return {
            show: false
        }
    },
    props: {
        noMore: {
            type: Boolean,
        }
    },
    mounted() {
        this.$nextTick(function () {
            this.moreClick();
        });
    },
    methods: {
        moreClick() {
            this.show = !this.show
        },
        searchClick() {
            this.$emit('searchHandle')
        },
        resetClick() {
            this.$emit('resetHandle')
        }
    }
}
</script>
<style scoped>
.btnRow {
    display: block;
}

.unBtnRow {
    display: none;
}
</style>

2.在父组件中引入查询按钮组件

<template>
    <!-- 如果是不需要显示更多查询，就在SearchButton传多一个变量 :noMore="true" -->
    <SearchButton @searchHandle="searchHandle" @resetHandle="resetHandle">
        <el-form-item label="任务编码">
            <el-input v-model.trim="queryParams.taskNo" placeholder="请输入" clearable />
        </el-form-item>
        <el-form-item label="任务名称">
            <el-input v-model.trim="queryParams.strategyName" placeholder="请输入" clearable />
        </el-form-item>
        <el-form-item label="任务编码">
            <el-input v-model.trim="queryParams.taskNo" placeholder="请输入" clearable />
        </el-form-item>
        <el-form-item label="任务名称">
            <el-input v-model.trim="queryParams.strategyName" placeholder="请输入" clearable />
        </el-form-item>
        <!-- 需要折叠的查询条件，放在more插槽里即可 -->
        <template #more>
            <el-form-item label="任务编码">
                <el-input v-model.trim="queryParams.taskNo" placeholder="请输入" clearable />
            </el-form-item>
            <el-form-item label="任务名称">
                <el-input v-model.trim="queryParams.strategyName" placeholder="请输入" clearable />
            </el-form-item>
        </template>
    </SearchButton>
</template>

<!-- js部分 -->
<script>
import SearchButton from "@/components/SearchButton"
export default {
    components: {
        SearchButton,
    },
    data() {
        return {
            queryParams: {},
        }
    },
    methods: {
        searchHandle() {
            // 查询相关代码
        },
        resetHandle() {
            // 重置条件相关代码
        },
    }
}    
</script>
<!-- css部分 -->
<style scoped>
.btnRow {
    display: block;
}

.unBtnRow {
    display: none;
}
</style>