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How to delete all nodes in javascript
- 青灯夜游Original
- 2021-04-19 18:40:034142browse
Javascript method to delete all nodes: first get the parent node; then use the firstElementChild attribute to get the first child node based on the parent node; finally use a while loop and the "child node.remove()" statement to loop through and delete All child nodes are sufficient.
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
javascript delete all 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>Rendering:
Description:
remove () method can be used to delete all elements on the parent node, including all text and child nodes.
firstElementChild only gets the first element node
[Recommended learning: javascript advanced tutorial]
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