如何使用JavaScript从元素中删除类名？
要使用JavaScript从元素中删除类名，代码如下-
示例
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
.newStyle {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
width: 100%;
padding: 25px;
background-color: rgb(147, 80, 255);
color: white;
font-size: 25px;
box-sizing: border-box;
text-align: center;
}
</style>
</head>
<body>
<h1>Remove className with JavaScript Example</h1>
<button class="btn">Remove Class</button>
<h2>Click the above button to remove className from below div</h2>
<div class="newStyle" id="sampleDiv">
This is a DIV element.
</div>
<script>
document.querySelector(".btn").addEventListener("click", addClassName);
function addClassName() {
var element = document.getElementById("sampleDiv");
element.classList.remove("newStyle");
}
</script>
</body>
</html>输出结果
上面的代码将产生以下输出-
在点击“删除课程”按钮时-