document.styleSheets[0]是个啥

时间:2021-01-15 20:14:42
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="css/css.css" />
<style>
.css01{
background-image: url(img/01.png);
}
</style>
<script>
// 无论link还是<style></style>,从前往后依次是0,1,2……
alert(document.styleSheets[0].rules[0].style.backgroundImage);
alert(document.styleSheets[1].rules[0].style.backgroundImage);
</script>
</head> <body>
<input type="file" id="inputFile" onchange="GetFilePath()" />
</body>
</html>