Question

gif动画有<amp-anim>个标签。但是我发现<amp-img>标签可以显示gif动画。我知道<amp-anim>标签可以设置占位符，但我不需要它。我不再发现任何诽谤。
所以，我的问题是“gif动画使用<amp-img>标签是否有问题？”

打开https://ampbyexample.com/playground/并粘贴下面的html代码，如果您想查看工作<amp-img>代码和<amp-anim>代码的工作方式。

<!doctype html>
<html ⚡>
<head>
  <meta charset="utf-8">
  <script async src="https://cdn.ampproject.org/v0.js"></script>
  <script async custom-element="amp-anim" src="https://cdn.ampproject.org/v0/amp-anim-0.1.js"></script>
  <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">
  <link rel="canonical" href="https://ampbyexample.com/components/amp-anim/">
  <style amp-boilerplate>body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}</style><noscript><style amp-boilerplate>body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}</style></noscript>
</head>
<body>

  <h2>amp-anim supports gif animation</h2>
  <amp-anim width="245" height="300" src="/img/gopher.gif" alt="an animation"
            attribution="The Go gopher was designed by Reneee French and is licensed under CC 3.0 attributions.">
  </amp-anim>

  <h2>amp-img also supports gif animation</h2>
  <amp-img width="245" height="300" src="/img/gopher.gif" alt="an animation"
            attribution="The Go gopher was designed by Reneee French and is licensed under CC 3.0 attributions.">
  </amp-img>
</body>
</html>

Answer 1

amp-anim和amp-img之间的唯一区别是performance: amp-anim is able to reduce CPU usage when the animation is off-screen。

Answer 2

您可以在amp-anim docs中阅读amp-anim是amp-img的扩展版本，因为它特别考虑了GIF动画的附加功能。只要amp-img正在为您工作，那么一定要使用它。

amp-anim组件与amp-img元素非常相似，并且提供额外的功能来管理加载和播放动画图片，如GIF。

使用amp-img标签进行gif动画

2 个答案: