<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button>点点点</button>
<div></div>
<script>
var btn = document.querySelector('button')
var div = document.querySelector('div')
btn.addEventListener('click', function () {
// location.href = 'http://www.baidu.com';
var timer = 5;
setInterval(function () {
if (timer == 0) {
location.href = 'http://www.php.cn';
} else {
div.innerHTML = '你还有' + timer + '秒就可以跳转了';
timer--
}
},1000)
/* setInterval(function(){
div.innerHTML = '你还有' + timer + '秒就可以跳转了'
timer--;
},1000) */
});
</script>
</body>
</html>
