vue element ui Transfer 列表添加雙擊事件，

 主要是利用render-content  自定義數據項渲染函數

可以根據這個案例去了解，下面直接上代碼

<template>
  <el-transfer v-model="value4" :props="{
      key: 'value',
      label: 'desc'
    }" :render-content="renderFunc" :data="data3">
  </el-transfer>
</template>

<script>
export default {
  data() {
    const generateData3 = _ => {
      const data = [];
      for (let i = 1; i <= 15; i++) {
        data.push({
          value: i,
          desc: `備選項 ${i}`,
          disabled: i % 4 === 0
        });
      }
      return data;
    };
    return {
      data3: generateData3(),
      value4: []
    };
  },
  mounted() {
    console.log(this.data3);
  },
  methods: {
    renderFunc(h, option) {
      console.log(option);
      var _this = this;
      return h("span", {
        attrs: {
          id: option.value
        },
        domProps: {
          innerHTML: option.desc
        },
        on: {
          dblclick: function() {
           
            //簡單的邏輯  如果不在 v-model值數組裏面，則push，否則從數組中刪除
            if (_this.value4.includes(option.value)) {
               console.log(22222)
              let index = _this.value4.indexOf(option.value);
              _this.value4.splice(index, 1);
            } else {
               console.log(333)
              _this.value4.push(option.value);
            }
          }
        }
      });
    }
  }
};
</script>