手机上退回重新进入就会出现两个不同的倒计时,如何只保持一个倒计时,清除之前的倒计时
var maxtime;
maxtime = 3 * 60;
function CountDown() {
var timer;
if (maxtime >= 0) {
var minutes = Math.floor(maxtime / 60);
var seconds = Math.floor(maxtime % 60);
var msg = "距离答题结束还有" + minutes + "分" + seconds + "秒";
maxtime=maxtime-1;
$('.djstst').html( msg);
} else {
clearInterval(timer);
}
}
function loop(){
CountDown();
var timer=setInterval(CountDown,1000); //刷新
}
loop();//消除等待1秒倒计时的bug