如何使用JavaScript偏移轮廓并将其绘制到边框边缘之外？
要偏移轮廓，请使用outlineOffset属性。它使您可以在边框边缘之外绘制轮廓。
您可以尝试运行以下代码以偏移轮廓并使用JavaScript将其绘制到边框边缘之外。
示例
<!DOCTYPE html>
<html>
<head>
<style>
#box {
width: 450px;
background-color: orange;
border: 3px solid red;
margin-left: 20px;
}
</style>
</head>
<body>
<p>Click below to add Outline Offset.</p>
<div id="box">
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
<p>This is a div. This is a div. This is a div. This is a div. This is a div.</p>
</div>
<br>
<button type="button" onclick="display()">Set Outline Offset</button>
<br>
<script>
function display() {
document.getElementById("box").style.outline = "thick solid";
document.getElementById("box").style.outlineColor = "#5F5F5F";
document.getElementById("box").style.outlineOffset = "7px";
}
</script>
</body>
</html>