<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button>获取验证码</button>
<script>
var t
var btn = document.querySelector('button')
console.log(btn)
btn.onclick = function () {
btn.disabled = true
btn.innerHTML = '10s倒计时'
clearInterval(t)
var count = 10
t = setInterval(function () {
count--
btn.innerHTML = count + 's'
if (count <= 0) {
clearInterval(t)
btn.disabled = false
btn.innerHTML = '10s倒计时'
}
}, 1000)
}
</script>
</body>
</html>