<!DOCTYPE html>
<html lang=”en”>
<head>
<meta charset=”UTF-8″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
<title>倒计时</title>
<style>
body {
padding: 40px;
}
ul {
padding: 0;
list-style: none;
}
li {
margin: 10px 0;
line-height: 26px;
display: flex;
}
input,
button {
padding: 0;
margin-left: 10px;
display: block;
}
input {
width: 190px;
outline: none;
}
button {
width: 120px;
}
.verify {
width: 60px;
}
</style>
</head>
<body>
<ul>
<li>
手机号:
<input type=”text”>
</li>
<li>
验证码:
<input type=”text” class=”verify”>
<button id=”btn”>获取验证码</button>
</li>
</ul>
<script>
let myBtn = document.querySelector(‘#btn’);
let timer;
myBtn.addEventListener(‘click’, function () {
myBtn.Disabled = true
let time = 3;
function MyFn() {
time–;
myBtn.innerHTML = `${time}秒之后重新获取`;
if (time < 0) {
clearInterval(timer)
myBtn.innerHTML = `获取验证码`;
myBtn.Disabled = false;
}
}
MyFn()
timer = setInterval(MyFn, 1000)
})
</script>
</body>
</html>
