基于element-ui，自定义季度选择器

前提条件：
由于最近项目中用到了季度选择器控件，无奈element ui组件没有提供，只能靠自己个儿啦

效果图如下：

代码如下：

（1）子组件部分：

<template>
    <div class="el-quarter-picker-wrap">
        <el-popover placement="bottom-start" title="" trigger="manual" content="" width="320" v-model="showCard">
            <el-input 
            slot="reference" 
            v-model="showText" 
            placeholder="请选择季度" 
            clearable prefix-icon="el-icon-date" 
            readonly
            @click.stop.native="showCard = true"
            >el-input>
            <div>
                
                <div class="yearChangeBox f-r a-c j-b">
                    <div>
                        <el-button icon="el-icon-d-arrow-left"  type="text" style="color:#303133;" @click="changeYear('prev')">el-button>
                    div>
                    <div class="font-16">{{showYear}}div>
                    <div>
                        <el-button icon="el-icon-d-arrow-right"  type="text" style="color:#303133;" @click="changeYear('next')">el-button>
                    div>
                div>

                
                <div class="quarterChangeBox f-r a-c j-b m-t20">
                    <div class="f-r j-c" v-for="(item, index) in quarterList" :key="index">
                        <div class="quarterItem f-r j-c c-p"  :class="selectedYear==showYear&&selectedQuarter==item? 'selecedQuarterItem':''" @click="changeQuarter(item)">{{item}}div>
                    div>
                div>
            div>
        el-popover>
    div>
template>

<script>
export default {
    props: {
        value:{
            type: [String,Number],
            default: "" ,
        }
    },
    model:{
        prop:"value",//定义v-model的值传递给那个prop属性
        event:"change",//定义此事件触发时，自动更新父组件v-model对应的数据  
    },
    data() {
        return {
            showCard: false,
            selectTime: "",//当前选中时间，格式为2023Q3

            showYear: null, //展示的年（下拉框）

            selectedYear:null, //被选中的年
            selectedQuarter:"", //被选中的季度

            quarterList:["Q1","Q2","Q3","Q4"]
        }
    },
    computed:{
        //格式化当前选中的时间并展示
        showText(){
            if(!this.selectTime){
                return ""
            }
            else{
                return this.selectTime;
            }
        }
    },
    mounted() {
        //监听全局按钮的点击
        let that = this
        document.body.addEventListener('click',function(){
            //console.log('点击了body')
            that.showCard = false;
        })
    },
    methods: {
        //切换年份
        changeYear(type = ''){
            if(type == 'next'){
                //时间往前后一年
                this.showYear =  this.showYear + 1;
            }
            else if(type == 'prev'){
                //时间往前推一年
                this.showYear =  this.showYear - 1;
            }
        },

        //切换季度
        changeQuarter(quarter){

            this.selectedQuarter = quarter;

            this.selectedYear = this.showYear;

            //当前选中时间
            this.selectTime = this.selectedYear + this.selectedQuarter;

            //隐藏季度选择下拉框
            this.showCard = false;

            //通知父组件 返回时间戳
            this.$emit('change',this.selectTime);
        }
    },
    watch:{
        value:{
            immediate:true, //immediate如果为true 代表如果在 wacth 里声明了之后，就会立即先去执行里面的handler方法
            handler:function(value){
                //如果传入的时间为""，则初始化当前选中时间为""，展示的年为当前年份，被选中的年份为""，被选中的季度为""
                if(!value){

                    this.selectTime = ""; //当前选中时间

                    let currentDateTime = new Date();
                    this.showYear = currentDateTime.getFullYear(); 

                    this.selectedYear = "";
                    this.selectedQuarter = ""; 
            
                }
                //如果传入的时间不为""，则初始化当前选中时间为传入的时间，展示的年为传入的时间年份，被选中的年份为传入的时间年份，被选中的季度为传入的时间季度
                else{
                    this.selectTime = value;

                    this.showYear = Number(value.slice(0, 4));

                    this.selectedYear = Number(value.slice(0, 4));
                    this.selectedQuarter = value.slice(4, 7);
                    
                }
            }
        }
    }
}
script>

<style lang='less'>
.yearChangeBox{
    height: 35px;
    border-bottom: 1px solid #e4e7ed;
}
.quarterChangeBox{
    padding: 0 10px;
    width: calc(100% - 20px);
}
.quarterItem{
    width: 50px;
}
.quarterItem:hover{
    color: #3967FB;
}
.selecedQuarterItem, .selecedQuarterItem:hover{
    background-color: #3967FB;
    color: #ffffff;
    border-radius: 4px;
}
style>

（2）调用子组件部分：

<template>
    <div class="wrapperBox">
		<quarter-picker class="searchInput-88" v-model="performanceTime">quarter-picker>
	div>
template>

<script>
import QuarterPicker from '@/components/quarter-picker'

export default {
    components: { QuarterPicker },
    data() {
        return {
            performanceTime:"",
        }
     },
     mounted() {},
     methods: {}
}
script>

如有漏洞，欢迎互动指教！！！！！！！！！！！！！