CountDown 倒计时

<!-- 基础用法 -->
  <re-count-down class="demo-count-down-basic" :time="3600000" />
  <re-count-down class="demo-count-down-short" :time="60000" />

<!-- 格式化 -->
  <re-count-down class="demo-count-down-hms" :time="3661000" format="HH:mm:ss" />
  <re-count-down class="demo-count-down-ms" :time="3661000" format="mm:ss" />
  <re-count-down class="demo-count-down-days" :time="90000000" format="DD天HH:mm:ss" />

<!-- 自动开始 -->
  <re-count-down class="demo-count-down-auto" :time="3600000" :autoStart="true" />
  <re-count-down class="demo-count-down-no-auto" :time="3600000" :autoStart="false" />

<!-- 毫秒级 -->
  <re-count-down class="demo-count-down-ms-precision" :time="3600000" :millisecond="true" format="HH:mm:ss:SSS" />

<!-- 不同时长 -->
  <re-count-down class="demo-count-down-1s" :time="1000" />
  <re-count-down class="demo-count-down-1m" :time="60000" />
  <re-count-down class="demo-count-down-1h" :time="3600000" />
  <re-count-down class="demo-count-down-1d" :time="86400000" />

<!-- 自定义样式 -->
  <re-count-down class="demo-count-down-custom-style" :time="3600000" customStyle="font-size: 20px; color: #e34d59;" />

<!-- 零时长 -->
  <re-count-down class="demo-count-down-zero" :time="0" />

<!-- 长时长 -->
  <re-count-down class="demo-count-down-long" :time="864000000" format="DD天HH:mm:ss" />