我已经创建了以下从5到0的倒计时功能,但它没有在0处重新开始倒计时。我的失败是什么?
JS:
var cc = 5;
var myTimer = setInterval(myFn, 1000);
function myFn() {
document.getElementById("counter").innerHTML = -- cc;
if (cc == 0) {
clearInterval(myTimer);
myTimer = setInterval(myFn, 1000);
}
}
HTML:
<span id="counter">5</span>
答案 0 :(得分:5)
您正在清除间隔并使用相同的回调设置另一个间隔,但您永远不会恢复cc
变量的值!
var cc = 5;
var myTimer = setInterval(myFn, 1000);
function myFn() {
document.getElementById("counter").innerHTML= --cc;
if (cc == 0) {
clearInterval(myTimer);
cc = 5;
myTimer = setInterval(myFn, 1000);
}
}
Countdown: <span id="counter">5</span>
答案 1 :(得分:2)
var cnt = 5;
var myTimer = setInterval(myFn, 1000);
function myFn() {
document.getElementById("counter").innerHTML= --cnt;
if (cnt == 0) {
clearInterval(myTimer);
cnt= 5;
myTimer = setInterval(myFn, 1000);
}
}
Counter: <span id="counter">5</span>