浏览器默认无法识别小于1像素
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 500px;
background-color: #000;
margin-bottom: 5px;
}
.line {
height: 1px;
/* 缩放0.5倍 */
transform: scaleY(0.5);
/*为了防止线模糊*/
transform-origin: 50% 100%;
}
.line1 {
height: 0.5px;
}
.line2 {
height: 1px;
}
</style>
</head>
<body>
<div class="line"></div>
<div class="line1"></div>
<div class="line2"></div>
</body>
</html>