html5+css3进度条倒计时动画特效代码【推荐】

function alertSet(e) {
document.getElementById("js-alert-box").style.display = "block",
document.getElementById("js-alert-head").innerHTML = e;
var t = 10,
n = document.getElementById("js-sec-circle");
document.getElementById("js-sec-text").innerHTML = t,
setInterval(function() {
if (0 == t){
location.href="https://www.jb51.net";
}else {
t -= 1,
document.getElementById("js-sec-text").innerHTML = t;
var e = Math.round(t / 10 * 735);
n.style.strokeDashoffset = e - 735
}
},
970);