location
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<a href="http://www.sdau.edu.cn"><span>5</span>秒钟跳转到首页</a>
<script>
const a = document.querySelector('a')
let num = 5
let timerId = setInterval(function () {
num--
a.innerHTML = `<span>${num}</span>秒钟跳转到首页`
if (num === 0) {
clearInterval(timerId)
location.href = 'http://www.sdau.edu.cn'
}
}, 1000)
</script>
</body>
</html>
navigator
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
(function () {
const userAgent = navigator.userAgent
// 验证是否为Android或iPhone
const android = userAgent.match(/(Android);?[\s\/]+([\d.]+)?/)
const iphone = userAgent.match(/(iPhone\sOS)\s([\d_]+)/)
// 如果是Android或iPhone,则跳转至移动站点
if (android || iphone) {
location.href = 'http://m.itcast.cn'
}
})();
</script>
</head>
<body>
</body>
</html>
history
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<button>后退</button>
<button>前进</button>
<script>
const back = document.querySelector('button:first-child')
const forward = back.nextElementSibling//下一个兄弟
back.addEventListener('click', function () {
// history.back()
history.go(-1)
})
forward.addEventListener('click', function () {
// history.forward()
history.go(1)
})
</script>
</body>
</html>