<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>js实现数字从1动态递增到10</title>
<script
src="https://code.jquery.com/jquery-3.4.1.js"
integrity="sha256-WpOohJOqMqqyKL9FccASB9O0KwACQJpFTUBLTYOVvVU="
crossorigin="anonymous"></script>
</head>
<body>
<span id="span1">5</span>
<script>
countdown(5); //调用函数;
funtion countdown(getNum){ //函数获得所需要倒计时的描述;
var num = getNum;
var t = setInterval(function(){
num--;
var span1 = document.getElementById("span1");
span1.innerText = num;
if(num==0){
clearInterval(t);
}
},1000);
}
</script>
</body>
</html>