JavaScript的 == 与 ===
值相同 ==
类型和值都相同   ===
index.vue
callback: (type) => {
            console.log("type->",typeof type);
          if (type && type == 0) {
                  return "直女";
              } else if (type && type == 1) {
                       return "直男";
              }
    },
table.vue
<el-table-column
    v-else-if="item.type === 'function'"
     :key="item.prop"
     :label="item.label"
      :prop="item.prop"
      :width="item.width"
 >
 <template slot-scope="scope">
   <!-- item.callback(scope.row) 把数据传出去  scope.row == data -->
<span>{{item.callback && item.callback(scope.row.type)}}</span>
</template>
</el-table-column>
console 控制台打印
type-> string
查看14道真题和解析

