前言

倒计时的运用场景：获取手机验证码倒计时、获取邮箱验证码倒计时等场景，废话不多说，开始吧。

实现效果

实现代码

html（重要部分）

<template>
  <el-button v-if="!sms.disabled" color="#f38301" type="default" @click="send"><span style="color:#eed2b0;">发送验证码</span></el-button>
  <el-button v-else type="default" color="#f38301" disabled><span style="color:#eed2b0;">{{ sms.count }} 秒后重新发送</span></el-button>
</template>

js（重要部分）

<script lang="ts" setup>
  // 验证码计时器
  const sms = reactive({
	disabled: false,
	total: 60,
	count: 0
  })
  // 计时器处理器
  const timerHandler = () => {
	sms.count = sms.total
	sms.disabled = true

	let timer = setInterval(() => {
		if (sms.count > 1 && sms.count <= sms.total) {
			sms.count--
		} else {
			sms.disabled = false
			clearInterval(timer)
		}
	}, 1000)
    }
    // 推送
    const send = () => {  
      if (formLabelAlign.username === '') {
        ElMessage.error("电子邮件为空")
      } else {
        // 计时器处理器
        timerHandler()
        // 加载ui
        const loadingInstance1 =  ElLoading.service({fullscreen: true})
        // api 请求
        return emailRegisterApi(formLabelAlign.username).then(res => {
        // 关闭加载
        loadingInstance1.close()
	  }).catch(() => {
        // 关闭加载
        loadingInstance1.close()
     })
  }
</script>

完整代码

<template>
  <div class="email-main">
    <div class="email-content">
      <div class="email-title">
        <h3>注册报名</h3>
      </div>
      <div class="email-step">
        <el-steps :active="active" finish-status="success" align-center="true">
        <el-step title="邮箱注册" />
        <el-step title="填写报名信息" />
        <el-step title="完成" />
        </el-steps>
      </div>
      <div class="email-table">
        <el-form
        ref="formRef"
        label-position="right"
        :model="formLabelAlign"
        style="width: 460px"
        label-width="100px"
        size="default"
        >
        <el-form-item prop="username" label="邮箱账号">
          <el-input v-model="formLabelAlign.username" />
        </el-form-item>
        <el-form-item prop="region"  label="设置密码">
          <el-input v-model="formLabelAlign.password" />
        </el-form-item>
        <el-form-item prop="code"  label="验证码">
          <el-input v-model="formLabelAlign.code" />
        </el-form-item>
        <el-form-item style="margin-left:50px;">
          <el-button color="#f38301" @click="submitForm">
            <span style="color:#eed2b0;">下一步</span>
          </el-button>
          <el-button color="#f38301" @click="resetForm(formRef)"> <span style="color: #eed2b0;">重置</span></el-button>
		      <el-button v-if="!sms.disabled" color="#f38301" type="default" @click="send"><span style="color:#eed2b0;">发送验证码</span></el-button>
			    <el-button v-else type="default" color="#f38301" disabled><span style="color:#eed2b0;">{{ sms.count }} 秒后重新发送</span></el-button>
        </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>
<script lang="ts" setup>
import { ref,reactive } from 'vue'
import { FormInstance, ElLoading, ElMessage  } from 'element-plus'
import { emailRegisterApi } from '@/api/facade/facade'
import { useRouter } from 'vue-router'
// 路由
const router = useRouter()
// 步骤标识
const active = ref(0)
// 重置
const formRef = ref<FormInstance>()
// 注册参数
const formLabelAlign = reactive({
  username: '',
  password: '',
  code: '',
})
// 验证码计时器
const sms = reactive({
	disabled: false,
	total: 60,
	count: 0
})

// 计时器处理器
const timerHandler = () => {
	sms.count = sms.total
	sms.disabled = true

	let timer = setInterval(() => {
		if (sms.count > 1 && sms.count <= sms.total) {
			sms.count--
		} else {
			sms.disabled = false
			clearInterval(timer)
		}
	}, 1000)
}

const resetForm = (formEl: FormInstance | undefined) => {
  if (!formEl) return
  formEl.resetFields()
}
// 下一步
const submitForm = () => {
  const loadingInstance1 =  ElLoading.service({fullscreen: true})
  if (formLabelAlign.username != '' && formLabelAlign.password != '' && formLabelAlign.code != '') {
    // 跳转到报名页面
    router.push({ path: '/sign_up_info', query: {username: formLabelAlign.username,
    password: formLabelAlign.password, code: formLabelAlign.code} })
  } else {
     ElMessage.warning("请完善全部信息")
  }
  loadingInstance1.close()
}
const send = () => {
  console.log('codeDisabled:',formLabelAlign.username)
  
  if (formLabelAlign.username === '') {
    ElMessage.error("电子邮件为空")
  } else {
    timerHandler()
    const loadingInstance1 =  ElLoading.service({fullscreen: true})
    return emailRegisterApi(formLabelAlign.username).then(res => {
    loadingInstance1.close()
	  }).catch(() => {
      ElMessage.error("Email数据异常")
      loadingInstance1.close()
  })
  }
}
</script>

<style scoped>
.email-main {
  height: 100%;
  width: 100%;
  position: relative;
}
.email-content {
  width: 1200px;
  height: 800px;
  border: 1px;
  position: relative;
  left: 400px;
  background: #f1f3f5;
}
.email-title {
  top: 30px;
  position: relative;
  left: 570px;
  margin-top: 100px;
}
.email-step {
  left: 100px;
  top: 0px;
  position: absolute;
  margin-top: 100px;
  width: 1000px;
}
.email-table {
  left: 350px;
  top: 200px;
  position: absolute;
}
:deep(.el-step__icon.is-text){ 
  border-radius: 50%;
  border: 2px solid #f38301;
  background: #f38301;
  color: #f1f3f5;
 }
</style>