JS实现挑战10秒,主要用到setInterval计时器,供大家参考,具体内容如下
效果图
## 完整代码
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< html lang = "en" > < head > < meta charset = "UTF-8" > < title >js计时器</ title > </ head > < body > < p style = "font-size: 2em;color: blue;font-style: italic;" >挑战10.00秒</ p > < p id = "time" style = "font-size: 2em;color: red;" >00:00</ p > < input type = "button" value = "开始" onclick = "oStart()" > < input type = "button" value = "结束" onclick = "oStop()" > < input type = "button" value = "重置" onclick = "oReset()" > < script > var n= 0, timer=null; var txt=document.getElementById("time"); //开始计时 function oStart() { clearInterval(timer); timer=setInterval(function () { n++; var m=parseInt(n/60); var s=parseInt(n%60); txt.innerText=toDub(m)+":"+toDub(s); },1000/60); }; //暂停并且清空计时器 function oStop() { clearInterval(timer); // txt.innerText="我爱你"; } //重置 function oReset() { txt.innerText="00:00"; n=0; } //补零 function toDub(n){ return n< 10 ?"0"+n:n; } </script> </ body > </ html > |
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原文链接:https://blog.csdn.net/qq_41605893/article/details/109540131