console 命令行工具 X clear

console

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Document</title>
</head>
<body>
  <div class="demo">
    哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈
  </div>
</body>
</html>

.demo{
 max-width:600px;
 background:skyblue;
}