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我是新来的Javascript,并与定时器玩了一下。我发现基于测试字段输入here的倒数计时器的代码,我试图向同一页面添加一个计数器计时器,但它不工作。基于用户输入的Javascript倒计时和countup计时器
<html>
<body>
<div id="countdown"></div>
<div id="countup"></div>
<div id="notifier"></div>
<script type="text/javascript">
function startTimer() {
userInput = document.getElementById('userTime').value;
if(userInput.length == 0){
alert("Please enter a value");
} else {
var numericExpression = /^[0-9]+$/;
if(!userInput.match(numericExpression)){
alert("Please enter a number")
} else {
var countuptime = 0;
function display(notifier, str) {
document.getElementById(notifier).innerHTML = str;
}
function toMinuteAndSecond(x) {
return Math.floor(x/60) + ":" + x%60;
}
function setTimer(remain, actions, countuptime) {
(function countup() {
display("countup", toMinuteAndSecond(userInput - countuptime));
(countuptime+= 1) <= userInput && setTimeout(arguments.callee, 1000);
})();
(function countdown() {
display("countdown", toMinuteAndSecond(remain));
actions[remain] && actions[remain]();
(remain -= 1) >= 0 && setTimeout(arguments.callee, 1000);
})();
}
setTimer(userInput, {
10: function() { display("notifier", "Just 10 seconds to go"); },
5: function() { display("notifier", "5 seconds left"); },
0: function() { display("notifier", "Time is up"); }
});
}
}
}
</script>
Please Enter A Number: <input type="text" id="userTime" />
<input type="button" value="Go" onclick="startTimer()" />
</body>
</html>
基本上,我试图创建一个从0开始,直到它是一样的userInput,此时应立即停止上升一个新的变量(countuptime)。但是,当我尝试测试时,向上计时器显示NaN:NaN。我正试图远离JQuery并获得Javascript的基础知识。
啊,傻我。谢谢! – an14