JavaScript - 使用数组填充下拉列表

问题描述：

我在脚本中声明了一个数组：

I have an array declared in a script:

var myArray = new Array("1", "2", "3", "4", "5" . . . . . "N");

我有一个包含下拉菜单的表格：

I have a form which contains a drop down menu:

<form id="myForm">
  <select id="selectNumber">
    <option>Choose a number</option>
  </select>
</form>

使用Javascript，如何使用数组值填充下拉菜单的其余部分？这样选项将是选择一个数字，1，2，3，4，5。。。。。 N？

Using Javascript, how will I populate the rest of the drop down menu with the array values? So that the options will be "Choose a number", "1", "2", "3", "4", "5" . . . . . "N"?

答

您需要遍历数组元素，为每个元素创建一个新的DOM节点并附加它你的对象。

You'll need to loop through your array elements, create a new DOM node for each and append it to your object.

var select = document.getElementById("selectNumber"); 
var options = ["1", "2", "3", "4", "5"]; 

for(var i = 0; i < options.length; i++) {
    var opt = options[i];
    var el = document.createElement("option");
    el.textContent = opt;
    el.value = opt;
    select.appendChild(el);
}

实例

JavaScript - 使用数组填充下拉列表

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