animation-iteration-count

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2015.

animation-iteration-count CSS 属性设置动画序列在停止前应播放的次数

尝试一下

animation-iteration-count: 0;

animation-iteration-count: 2;

animation-iteration-count: 1.5;

<section class="flex-column" id="default-example">
  <div>Animation <span id="playstatus"></span></div>
  <div id="example-element">Select a count to start!</div>
</section>

#example-element {
  align-items: center;
  background-color: #1766aa;
  border-radius: 50%;
  border: 5px solid #333;
  color: white;
  display: flex;
  flex-direction: column;
  height: 150px;
  justify-content: center;
  margin: auto;
  margin-left: 0;
  width: 150px;
}

#playstatus {
  font-weight: bold;
}

.animating {
  animation-name: slide;
  animation-duration: 3s;
  animation-timing-function: ease-in;
}

@keyframes slide {
  from {
    background-color: orange;
    color: black;
    margin-left: 0;
  }
  to {
    background-color: orange;
    color: black;
    margin-left: 80%;
  }
}

"use strict";

window.addEventListener("load", () => {
  const el = document.getElementById("example-element");
  const status = document.getElementById("playstatus");

  function update() {
    status.textContent = "delaying";
    el.className = "";
    window.requestAnimationFrame(() => {
      window.requestAnimationFrame(() => {
        el.className = "animating";
      });
    });
  }

  el.addEventListener("animationstart", () => {
    status.textContent = "playing";
  });

  el.addEventListener("animationend", () => {
    status.textContent = "finished";
  });

  const observer = new MutationObserver(() => {
    update();
  });

  observer.observe(el, {
    attributes: true,
    attributeFilter: ["style"],
  });

  update();
});

使用动画的简写属性 animation 可以一次性设置所有动画属性，这通常非常方便。

语法

css
/* 关键字值 */
animation-iteration-count: infinite;

/* 数字值 */
animation-iteration-count: 3;
animation-iteration-count: 2.4;

/* 多个值 */
animation-iteration-count: 2, 0, infinite;

/* 全局值 */
animation-iteration-count: inherit;
animation-iteration-count: initial;
animation-iteration-count: revert;
animation-iteration-count: revert-layer;
animation-iteration-count: unset;

animation-iteration-count 属性可以指定一个或多个以逗号分隔的值。

值

infinite

无限循环播放动画。

<number>

动画重复的次数；默认为 1。你可以指定非整数值以播放动画循环的一部分：例如，0.5 将播放动画循环的一半。负值是无效的。

备注： 当你在 animation-* 属性上指定多个逗号分隔的值时，它们将按照 animation-name 出现的顺序应用于动画。对于动画数量和 animation-* 属性值不匹配的情况，请参见设置多个动画属性值。

形式定义

初始值1
适用元素all elements, ::before and ::after pseudo-elements
是否是继承属性否
计算值as specified
动画类型Not animatable

形式语法

animation-iteration-count = 
  <single-animation-iteration-count>#  

<single-animation-iteration-count> = 
  infinite        |
  <number [0,∞]>

示例

设置迭代次数

该动画将会播放 10 次。

HTML

html
<div class="box"></div>

CSS

css
.box {
  background-color: rebeccapurple;
  border-radius: 10px;
  width: 100px;
  height: 100px;
}

.box:hover {
  animation-name: rotate;
  animation-duration: 0.7s;
  animation-iteration-count: 10;
}

@keyframes rotate {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}

结果

将鼠标悬停在矩形上来播放动画。

参见 CSS 动画示例。

规范

Specification
CSS Animations Level 1
# animation-iteration-count

浏览器兼容性

BCD tables only load in the browser

参见