<div class="test">
  <p class="title">
    <select v-model="selected" v-on:change="change">
     <option v-for="option in options" v-bind:value="option.value">
      {{ option.text }}
     </option>
    </select>
  </p>

  <span>{{selected}}</span>
  <div id="timesharechart" v-show="isvisible" ></div> 
  <div id="receiveDispose" v-show="!isvisible"></div> 
</div>

<script>
  export default{
    name:"test",
    data(){
      return {
        selected: 'timeshare',
        options: [
         { text: '分时警情', value: 'timeshare' },
         { text: '接警与处置', value: 'receive' }
        ],
        isvisible:true
      }
    },


    methods:{
      change:function(){
        if(this.selected == "receive"){
          this.isvisible = false;
        }else{
          this.isvisible = true;
        }
      },
</script>

change:function(){
        if(this.isvisible == true){
          this.isvisible = false;
        }else{
          this.isvisible = true;
        }
      }

drawCharts(){
   // 基于准备好的dom，初始化echarts实例,dom容器中需要在调用echart.init之前，必须给图形dom加上对应的宽度和高度，不然echarts不能渲染
   document.getElementById("container").style.display = "block";
   let myChart = this.$echarts.init(document.getElementById('container'));
        // 绘制图表
        receiveChart.setOption({});
  }