：应用环境一般为考试倒计时，获取验证码的倒计时运行环境为vue，小程序/**初始数据*/data(){return{agreeCountDown:'00:02:00',//显示agreeCountTime:2*60,//操作agreeShow:true,}}/**倒计时开始事件*/getCode(){letthat=this;让maxtime=that.agreeCountTime;lettimer=setInterval(function(){if(maxtime<=0){clearInterval(timer);that.agreeShow=false;return;}maxtime--;让分钟=('0'+Math.floor(maxtime/60)).substr(-2);让seconds=('0'+Math.floor(maxtime%60)).substr(-2);让msg='00:'+minutes+':'+seconds;那.agreeCountDown=msgconsole.log(that.agreeCountDown)},1000);},
