普通项目
<html>
<head>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
var countdown=60;
function settime(obj) {
if (countdown == 0) {
obj.removeAttribute("disabled");
obj.value="免费获取验证码";
countdown = 60;
return;
} else {
obj.setAttribute("disabled", true);
obj.value="重新发送(" + countdown + ")";
countdown--;
}
setTimeout(function() {
settime(obj) }
,1000)
}
</script>
<body>
<input type="button" id="btn" value="免费获取验证码" onclick="settime(this)" />
</body>
</html>vue项目
//html
<span v-show="show" @click="getCode">获取验证码</span>
<span v-show="!show" class="count">{{count}} s</span>
//js
data(){
return {
show: true,
count: '',
timer: null,
}
},
methods:{
getCode(){
const TIME_COUNT = 60;
if (!this.timer) {
this.count = TIME_COUNT;
this.show = false;
this.timer = setInterval(() => {
if (this.count > 0 && this.count <= TIME_COUNT) {
this.count--;
} else {
this.show = true;
clearInterval(this.timer);
this.timer = null;
}
}, 1000)
}
}
}