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In JavaScript, you can use the setAttribute() method to modify the css style through classes. You only need to modify the "class" attribute value of the specified element. The syntax "element object.setAttribute("class", "New Class name ");".
The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.
In JavaScript, you can use the setAttribute() method to modify css styles through classes.
Let’s take a closer look through the code example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<style>
.style1{
height: 50px;
border: 1px solid red;
}
.style2{
border: 3px dashed #AFEEEE;
padding: 10px;
}
</style>
</head>
<body>
<div id="style" class="style1">测试文本</div><br />
<input type="button" value="更改类名" onclick="changeStyle()" />
</body>
<script>
function changeStyle() {
var obj = document.getElementById("style");
obj.setAttribute("class", "style2");
}
</script>
</html>Rendering:
Description:
The setAttribute() method adds the specified attribute and assigns it the specified value.
Only sets/changes the value if this specified property already exists.
Syntax
element.setAttribute(attributename,attributevalue)
| Parameters | Type | Description |
|---|---|---|
| attributename | String | Required. The name of the attribute you wish to add. |
| attributevalue | String | Required. The attribute value you wish to add. |
(Learning video sharing: css video tutorial)
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