​x
 
<!DOCTYPE html>
<html>
<head>
<style>
div {
  width: 80px;
  height: 80px;
  background-color: pink;
}
​
div.a {
  transform: rotate(atan(500));
}
​
div.b {
  transform: rotate(atan(1));
}
​
div.c {
  transform: rotate(atan(0));
}
​
div.d {
  transform: rotate(atan(-5000));
}
</style>
</head>
<body>
​
<h1>atan() 函数</h1>
​
<p>使用 atan() 旋转元素：</p>
​
<h2>transform: rotate(atan(500)):</h2>
<div class="a">Hello World!</div>
<br>
​
<h2>transform: rotate(atan(1)):</h2>
<div class="b">Hello World!</div>
<br>
​
<h2>transform: rotate(atan(0)):</h2>
<div class="c">Hello World!</div>
​
<h2>transform: rotate(atan(-5000)):</h2>
<div class="d">Hello World!</div>
​
</body>
</html>
​