How to delete nodes in javascript-JS Tutorial-php.cn

How to delete nodes in javascript

青灯夜游

Release： 2023-01-04 09:33:54

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Javascript method to delete a node: 1. Use the remove() method, which can be used to delete all elements on the parent node, including all text and child nodes; 2. Use the removeChild() method, which can be used to delete the parent node. a child node of .

How to delete nodes in javascript

The operating environment of this tutorial: Windows 7 system, ECMAScript version 5, Dell G3 computer.

In JavaScript, you can use the removeChild() or remove() method to delete nodes.

1. Use removeChild() to delete a node.

The removeChild() method deletes a specified child node of the specified element. Returns the deleted node as a Node object, or null if the node does not exist.

Syntax

node.removeChild(node)

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node: required. The node object you wish to delete.

Example:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>

<ul id="myList"><li>Coffee</li><li>Tea</li><li>Milk</li></ul>
<p id="demo">单击按钮移除列表的第一项</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
	var list=document.getElementById("myList");
	list.removeChild(list.childNodes[0]);
}
</script>

</body>
</html>

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How to delete nodes in javascript

[Recommended learning: js Basic Tutorial】

2. Use the remove() method to delete nodes

The remove() method can be used to delete all elements on the parent node, including all text and child nodes.

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
</head> 
  
<body> 
    <ul style="border: 2px dashed #006DAF;"> 
        <li>Get Up in Morning</li> 
        <li>Do some exercise</li> 
        <li>Get Ready for school</li> 
        <li>Study Daily</li> 
        <li>Do homework</li> 
    </ul> 
    <input id="btn" type="button" value="删除子节点"> 
</body> 
<script> 
    function deleteChild() { 
        var e = document.querySelector("ul"); 
        var first = e.firstElementChild; 
        while (first) { 
            first.remove(); 
            first = e.firstElementChild; 
        } 
    } 
    var btn = document.getElementById("btn").onclick = function() { 
        deleteChild(); 
    } 
</script> 
  
</html>

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How to delete nodes in javascript

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