中国地图点击切换省级地图

<template>
    <div style="width:100%;height:100%;">
        <div><span @click="chinaFn">中国</span><span>{{cityName}}</span></div>
        <div style="width:700px;height:800px;" ref="chinaMap"></div>
    </div>
</template>

<script>
import  'echarts/map/js/china.js'
import  'echarts/map/js/province/henan.js'
import  'echarts/map/js/province/jiangsu.js'
import  'echarts/map/js/province/jiangxi.js'
import  'echarts/map/js/province/zhejiang.js'
export default {
    data(){
        return {
            myChart4:null,
            city: 'china',
            cityName: ''
        }
    },
    methods: {
        chinaFn(){
            this.cityName = ""
            this.inptMap()
        },
        // 省级地图
        cityMap(cityName){            
            let chinaOption = this.optionMap(cityName)
            this.myChart4 = this.$echarts.init(this.$refs.chinaMap);
            this.myChart4.setOption(chinaOption);
        },
        optionMap(city){
            console.log(city);
            // 根据参数city获取数据，赋值给data
            var data = [
                {name: '江西', value:10},
                {name: '浙江', value:10},
            ];
            var option = {
                tooltip: {
                    trigger: 'item',
                    formatter: '{b}{c}',
                },
                series: [{
                    name: '中国',
                    type: 'map',
                    mapType: city,
                    selectedMode: false,//single 表示单选;multiple表示多选 默认flase不选
                    itemStyle: {
                        normal: {
                            borderWidth: 2,
                            borderColor: '#fff',
                            background: '#f00',
                            areaColor: '#186AB6',
                            color: '#fff',
                            label: {
                                show: true,
                                textStyle: {
                                    color: '#fff'
                                }
                            }
                        },
                        emphasis: { // 也是选中样式
                            borderWidth: 2,
                            borderColor: '#fff',
                            areaColor: '#238DEC',
                            label: {
                                show: true,
                                textStyle: {
                                    color: '#fff'
                                }
                            }
                        }
                    },
                    //此为加载的数据
                    data: data
                }]
            };  
            return option
        },
        // 初始化
        inptMap(){

            let that = this
            
            let chinaOption = this.optionMap('china')
            
            this.myChart4 = this.$echarts.init(this.$refs.chinaMap);
            this.myChart4.setOption(chinaOption);

            this.myChart4.on('click',params=>{
                event.stopPropagation();
                that.cityMap(params.name)
                this.cityName = params.name
            })

        }
    },
    mounted() {
        this.inptMap()
    },
}
</script>

<style>
    span{
        padding: 0 20px;
        
    }
</style>