css 设置左边框的宽度

编辑代码

<!DOCTYPE html>
<html>
<head>
<style>
p {
	border-style: solid;
	border-left-width: 15px;
}
</style>
</head>

<body>
<p><b>Note:</b> The "border-left-width" property does not work if it is used alone. Use the "border-style" property to set the borders first.</p>
</body>
</html>