系列教程之element點擊按鈕獲取select多選框的值

<div id="app">
      <el-select v-model="opvalue" placeholder="請選擇">   //這裏v-model獲取的是value值
        <el-option
          v-for="item in options"
              :key="item.value"
              :label="item.label"
              :value="item.value">
        </el-option>
      </el-select>
      <el-button type="success" @click="getdata">提交</el-button>
   </div>

  <script>
    new Vue({
      el: '#app',
        data() {
          return {
             options: [{
                      value: '1',
                      label: 'java'
                    }, {
                      value: '2',
                      label: 'c++'
                    }],
              opvalue: [] ,
              mylabel:'',
              calendarData: []   //賦值
          }; 
        },

      methods: {        
        getdata(){
            this.mylabel='';  //置空
             //獲取label值 
            for(let key in this.options){
                let obj = this.options.map((item)=>{
                    if(item.value===this.opvalue[key]){//如果是this.opvalue，只能獲取單個值
                       this.mylabel+=item.label
                    }
                })

            }
            let params={
                value:this.opvalue,
                label:this.mylabel
            };
            
            console.log(params)






            //將值賦給calendarData，日期個位前有0，如06
            //   calendarData: [
            //       { months: ['06', '11'],days: ['15', '18'],things: '看電影' },
            //       { months: ['10', '11'], days: ['02'],things: '去公園野炊' },
            //       { months: ['11'], days: ['02'],things: '看星星' },
            //       { months: ['11'], days: ['02'],things: '看月亮' }   
            //   ],
            var now = new Date(); //當前日期
            var nowDay = now.getDate(); //當前日
            var nowMonth = now.getMonth()+1; //當前月,這裏是0到11
            var nowYear = now.getFullYear(); //當前年
            var months = [];
            var days = [];
            months.push(nowMonth.toString().replace(/^(\d)$/,'0$1'))  //數字轉成字符串,使用正則表達式在個位補0
            days.push(nowDay.toString().replace(/^(\d)$/,'0$1'))
            let results = {
                months: months,
                days: days,
                things:this.mylabel
            }
            this.$set(this.calendarData, 0, results)
            //this.calendarData.splice(1)
            
        }
      }
    })
  </script>