<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<!-- 左侧 -->
<div style="width: 240px;float:left;height: 300px;background:#666; ">
<button type="button" onclick="javascript:alert('test')">右侧按钮1</button>
</div>
<!-- 右侧 -->
<div style="width:100%;float:right; margin-left:-250px;">
<div style="margin-left:250px; height:300px;background:#666;">
</div>
</div>
</body>
</html>This method can realize the left and right layout normally, but there is a problem: due to the floating overlay method, the button in the left div cannot be clicked.
Solution: Add position attributes (such as relative, absolute, etc.) to floating elements
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<!-- 左侧 -->
<div style="width: 240px;float:left;height: 300px;background:#666; position: relative;">
<button type="button" onclick="javascript:alert('test')">右侧按钮1</button>
</div>
<!-- 右侧 -->
<div style="width:100%;float:right; margin-left:-250px;">
<div style="margin-left:250px; height:300px;background:#666;">
</div>
</div>
</body>
</html>
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
