此页面由社区从英文翻译而来。了解更多并加入 MDN Web Docs 社区。
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 2015年9月.
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
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
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。
[フレーム]
参见 CSS 动画示例。
规范
| Specification |
|---|
| CSS Animations Level 1 # animation-iteration-count |
浏览器兼容性
Loading...