如果你真的需要一个 polyfill，那么你可以使用下面的 CSS polyfill 模拟出 <blink> 元素的闪烁效果。适用于 IE10+。 - 在线编辑器

<style>
blink {
  -webkit-animation: 2s linear infinite condemned_blink_effect; // for android
  animation: 2s linear infinite condemned_blink_effect;
}

@-webkit-keyframes condemned_blink_effect {
  // for android
  0% {
    visibility: hidden;
  }
  50% {
    visibility: hidden;
  }
  100% {
    visibility: visible;
  }
}

@keyframes condemned_blink_effect {
  0% {
    visibility: hidden;
  }
  50% {
    visibility: hidden;
  }
  100% {
    visibility: visible;
  }
}
</style>

<blink>这里的文本会慢慢闪烁</blink>
​x
 
<style>
blink {
  -webkit-animation: 2s linear infinite condemned_blink_effect; // for android
  animation: 2s linear infinite condemned_blink_effect;
}
​
@-webkit-keyframes condemned_blink_effect {
  // for android
  0% {
    visibility: hidden;
  }
  50% {
    visibility: hidden;
  }
  100% {
    visibility: visible;
  }
}
​
@keyframes condemned_blink_effect {
  0% {
    visibility: hidden;
  }
  50% {
    visibility: hidden;
  }
  100% {
    visibility: visible;
  }
}
</style>
​
<blink>这里的文本会慢慢闪烁</blink>
​