我并没有点start 只要运行就会增加而且点stop也没有用-慕课网

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我并没有点start 只要运行就会增加而且点stop也没有用

来源：8-6 取消计时器clearTimeout()

努力努力再努力圈

2020-02-22 12:06

<!DOCTYPE HTML>

<html>

<head>

var num=0;

var i;

function startCount(){

document.getElementById('count').value=num;

num=num+1;

i=setTimeout("startCount()",1000);

}

setTimeout("startCount()",1000);

function stopCount(){

clearTimeout(i);

}

</script>

</head>

<body>

<form>

</form>

</body>

</html>

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4回答

慕尼黑1441384

2020-08-02 21:21:13

成功持行的代码：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>

<script type="text/javascript">
var num=0;
var i;
function startCount(){
document.getElementById('count').value=num;
num=num+1;
i=setTimeout("startCount()",1000);
}
function stopCount(){
clearTimeout(i);
}
</script>
</head>
<body>
<form>
<input type="text" id="count" />
<input type="button" value="Start" onclick="startCount()" />
<input type="button" value="Stop" onclick="stopCount()" />
</form>
</body>
</html>

0 0
慕村6055097

2020-04-20 10:46:25

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>

<script type="text/javascript">
var num=0;
var i;
function startCount(){
document.getElementById('count').value=num;
num=num+1;
i=setTimeout("startCount()",1000);
}
function stopCount(i){
clearTimeout(i);
}
</script>
</head>
<body>
<form>
<input type="text" id="count" />
<input type="button" value="Start" onclick="startCount()" />
<input type="button" value="Stop" onclick="stopCount(i)" />
</form>
</body>
</html>

0 0
流星64

2020-03-13 13:26:03

你点击事件都写错了，计时器多写了一个

0 1
朦胧5

2020-02-23 16:19:07

你startCount()函数下面有一条触发语句 setTimeout("startCount()",1000);

3 1

流星64 回复qq_精慕门...

这个要改的地方太多了

2020-03-13 13:24:01

共 3 条回复 >