5 数组sort的排序

<select  id="mySelect">
        <option value="price">低价优先</option>
        <option value="distance">距离优先</option>
    </select>
    <script>
        var arr=[
            {name:"肯德基",price:100,distance:100},
            {name:"必胜客",price:200,distance:500},
            {name:"华莱士",price:50,distance:1000},
        ]
        var mySelect = document.getElementById("mySelect");
        // onchange  输入框变化时触发事件
        mySelect.onchange = function(){
            console.log(this.value);
            var value = this.value;
          arr.sort(function(a,b){
              return a[value]-b[value];
          })
          console.log(arr)
        }
    </script>