6 数组中删除搜索的内容

 <input type="text" id="app">
    <script>
        var  arr = [
            {name:"李四",id:"1001"},
            {name:"王四",id:"1002"},
            {name:"张四",id:"1003"},
            {name:"赵四",id:"1004"}
        ]
        /* 
        1.要获取数组中的值
        2.根据id值   获取数组中对应项的下标
        3.删除对应的项
        */
        var app = document.getElementById("app");
       app.onkeydown = function(event){
           if(event.keyCode==13){
               var id =Number(this.value);
               var index =arr.findIndex(item=>{
                   return item.id == id;
               })
               arr.splice(index,1);
               console.log(arr)
           }
       }
    </script>