如何使用 JavaScript 来使用媒体查询?
javascriptweb developmentobject oriented programming
要使用 JavaScript 来使用媒体查询，代码如下 −
示例
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
color: white;
padding: 20px;
}
</style>
</head>
<body>
<h1>Using media queries with JavaScript Example</h1>
<h2>Resize the screen to see the color change from blue to red</h2>
<script>
var mediaQuery = window.matchMedia("(max-width: 700px)");
function setColor(mediaQuery) {
if (mediaQuery.matches) {
document.body.style.backgroundColor = "red";
} else {
document.body.style.backgroundColor = "blue";
}
}
setColor(mediaQuery);
mediaQuery.addListener(myFunction);
</script>
</body>
</html>
输出
当窗口大小大于 700px 时，上述代码将产生以下输出 −
当调整浏览器窗口大小至小于 700px 时 −
