<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<title>2.1 浏览器兼容性</title>
<style>
header, footer {
width: 100%;
height: 50px;
}
header {
background-color: red;
/*display: -webkit-flex;
display: -moz-flex;
display: -ms-flex;
display: -o-flex;
display: flex;
justify-content: center;
-ms-align-items: center;
align-items: center;*/
/*text-align: center;
line-height: 50px;*/
}
footer {
background-color: green;
}
.flexbox header {
display: -webkit-flex;
display: -moz-flex;
display: -ms-flex;
display: -o-flex;
display: flex;
justify-content: center;
-ms-align-items: center;
align-items: center;
}
.no-flexbox header {
text-align: center;
line-height: 50px;
}
</style>
<script src="js/html5shiv.min.js"></script>
<script src="js/modernizr.js"></script>
</head>
<body>
<header>header</header>
<footer>footer</footer>
<script>
// if (requestAnimationFrame) { // 错误
// // ...
// }
// if (window.requestAnimationFrame) { // 正确
// } else {
// }
var requestAnimationFrame = window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (fn) {
setTimeout(fn, 16);
};
requestAnimationFrame(function () {
console.log(1);
});
</script>
</body>
</html>