js获取验证码倒计时

<view class="sendVCode">
<text v-if="!isSend" @click="sendCode()" class="sendText">发送验证码</text>
<text v-if="isSend" class="sendCodeNumber">{{codeTime}}</text>
</view>

<script>
	export default {
		data() {
			return {
				//银行卡号
				cardnumber: "",
				//选择银行
				selectBank: "",
				//姓名
				userName: "",
				//身份证号
				idNumber: "",
				//手机号
				userPhoneNumber: "",
				//验证码
				verificationCode: "",
				// 验证码
				isSend: false,
				//倒计时
				codeTime: 60,
			}
		},
		methods: {
			sendCode() {
				this.isSend = true
				let _this = this
				let timer = setInterval(function() {
					if (_this.codeTime == 0) {
						_this.codeTime = 60
						_this.isSend = false
						clearInterval(timer)
					}
					_this.codeTime -= 1
				}, 1000)


			},
		}
	}
</script>

效果图