Question

在控制台上，它应该打印以数组形式创建的特定div的div id，并且每次创建div时，其值应存储在数组中，每当删除div时，应从数组中删除相应div的值。

<!DOCTYPE html>
    <html>
    <head>

</head>
<body>

<p>Click the button to make a Division element.</p>

<button id="button" onclick="myFunctionTry()">Add</button>

<div id="myDIV">
</div>

<script>
var counter=1;
   function myFunctionTry()
   {

            var x = document.createElement("DIV");
            x.id="div"

            var z= document.createElement("button");
            z.id="btn";
            x.setAttribute("style", "border :1px solid;height: 250px; width: 250px; top: 741px; left: 491px; padding:10px; margin: 50px;");
            z.setAttribute("style", "background: #000 url(/home/subodh/Desktop/Widget/icon_incorrect.svg) no-repeat 0px 0px; height: 30px; width:40px; top: 6px; left: 4px; float: right; margin: 0px; padding:0px; clear: both; float:right;");

            x.appendChild(z);
            document.body.appendChild(x).appendChild(z);

            var divNumber = counter;
                counter++;
                var arr=[];
               arr.push(divNumber);

               console.log(arr);

            z.onclick = function remove(btn) 
            {
            x.parentElement.removeChild(x);
            var arr1=arr;
            console.log(arr1);
            }



   }

</script>

</body>
</html>

如何获得输出：[1] [1,2] [1,2,3] .......运行上述代码。 M getn输出为[1] [2] [3] .......如何使用javascript完成此操作。

Answer 1

您需要在函数外部定义数组变量。请参阅以下代码：

＆＃13;

<!DOCTYPE html>
<html>

<head>

</head>

<body>

  <p>Click the button to make a Division element.</p>

  <button id="button" onclick="myFunctionTry()">Add</button>

  <div id="myDIV">
  </div>

  <script>
    var counter = 1;
    var arr = [];

    function myFunctionTry() {

      var x = document.createElement("DIV");
      x.id = "div"

      var z = document.createElement("button");
      z.id = "btn";
      x.setAttribute("style", "border :1px solid;height: 250px; width: 250px; top: 741px; left: 491px; padding:10px; margin: 50px;");
      z.setAttribute("style", "background: #000 url(/home/subodh/Desktop/Widget/icon_incorrect.svg) no-repeat 0px 0px; height: 30px; width:40px; top: 6px; left: 4px; float: right; margin: 0px; padding:0px; clear: both; float:right;");

      x.appendChild(z);
      document.body.appendChild(x).appendChild(z);

      var divNumber = counter;
      counter++;

      arr.push(divNumber);

      console.log(arr);

      z.onclick = function remove(btn) {
        x.parentElement.removeChild(x);
        var arr1 = arr;
        console.log(arr1);
      }



    }
  </script>

</body>

</html>

＆＃13;

如何在javascript中添加和删除数组中的值？

1 个答案: