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author | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
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committer | Peter Bengtsson <mail@peterbe.com> | 2020-12-08 14:40:17 -0500 |
commit | 33058f2b292b3a581333bdfb21b8f671898c5060 (patch) | |
tree | 51c3e392513ec574331b2d3f85c394445ea803c6 /files/zh-cn/web/api/animation/playstate | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/animation/playstate/index.html b/files/zh-cn/web/api/animation/playstate/index.html new file mode 100644 index 0000000000..b3bedac354 --- /dev/null +++ b/files/zh-cn/web/api/animation/playstate/index.html @@ -0,0 +1,156 @@ +--- +title: Animation.playState +slug: Web/API/Animation/playState +tags: + - Animation + - animation api + - 动画 + - 运动状态 +translation_of: Web/API/Animation/playState +--- +<p>{{APIRef("Web Animations")}}{{SeeCompatTable}}</p> + +<p>作为一个 <a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Animations_API">Web Animations API</a> 的属性,<code><strong>Animation</strong></code><strong><code>.playState </code></strong><code>能够返回并设置一个可枚举值来描述一个动画的回放状态。</code></p> + +<div class="note"> +<p>这个属性只对CSS Animations 和 Transitions可读。</p> +</div> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox">var<em> currentPlayState</em> = <em>Animation</em>.playState; + +<em>Animation</em>.playState = <em>newState</em>; +</pre> + +<h3 id="可能的值">可能的值</h3> + +<dl> + <dt><code>idle</code></dt> + <dd>动画当前的时间是无法解析的,并且队列里没有处于等待执行的任务。</dd> + <dt><code>pending</code></dt> + <dd>动画将一直等到某些等待中的任务完成方会执行。</dd> + <dt><code>running</code></dt> + <dd>动画处于正在运行状态。</dd> + <dt><code>paused</code></dt> + <dd>动画中止,并且{{domxref("Animation.currentTime")}}该项属性不会更新。</dd> + <dt><code>finished</code></dt> + <dd>动画已经达到某一临界点,并且{{domxref("Animation.currentTime")}}该项属性不会更新。</dd> +</dl> + +<h2 id="实例">实例</h2> + +<p>在<a href="http://codepen.io/rachelnabors/pen/PNYGZQ?editors=0010">Growing/Shrinking Alice Game</a>这个例子中, 玩家们可以凭<a href="http://codepen.io/rachelnabors/pen/EPJdJx?editors=0010">Alice crying into a pool of tears</a>结束游戏。出于性能原因,游戏里,眼泪只当可见之时才能运动。因此,这些泪滴必须在下面的情况下刚好暂停运动:</p> + +<pre class="brush: js">// 创建泪珠动画 + +tears.forEach(function(el) { + el.animate( + tearsFalling, + { + delay: getRandomMsRange(-1000, 1000), // 获取每一滴随机泪珠 + duration: getRandomMsRange(2000, 6000), // 获取每一滴随机泪珠 + iterations: Infinity, + easing: "cubic-bezier(0.6, 0.04, 0.98, 0.335)" + }); + el.playState = 'paused'; +}); + + +// 结尾需要现出时播放眼泪降落动画 + +tears.forEach(function(el) { + el.playState = 'playing'; +}); + + +// 暂停并重置正在哭泣时的泪滴动画 + +tears.forEach(function(el) { + el.playState = "paused"; + el.currentTime = 0; +}); +</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">格式</th> + <th scope="col">状态</th> + <th scope="col">注解</th> + </tr> + <tr> + <td>{{SpecName('Web Animations', '#play-state', 'playState')}}</td> + <td>{{Spec2("Web Animations")}}</td> + <td>Initial definition.</td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<div>{{CompatibilityTable}}</div> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari (WebKit)</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatChrome(39.0)}} [1]</td> + <td>{{CompatGeckoDesktop(48)}}<sup>[2]</sup></td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Android Webview</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatNo}}</td> + <td>{{CompatChrome(39.0)}} [1]</td> + <td>{{CompatChrome(39.0)}} [1]</td> + <td>{{CompatGeckoMobile(48)}}<sup>[2]</sup></td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<p>[1] 在Chrome 50之前, <code>idle</code> 这项属性只用在还没开始的动画上,而在Chrome 50之后, 以 <code>paused显示</code>.</p> + +<p>[2] 默认情况下,Web Animations API 只在Firefox Developer Edition 和 Nightly builds可用。您可以在测试版和公开版的设置里通过配置偏好来启用,将<code>dom.animations-api.core.enabled</code> 设为 <code>true</code>, 然后也可在任何版本的Firefox上通过设置为<code>false来</code>禁用它。</p> + +<h2 id="参见">参见</h2> + +<ul> + <li><a href="/en-US/docs/Web/API/Web_Animations_API">Web Animations API</a></li> + <li>{{domxref("Animation")}} 获取更多可用来控制网页动画的方法和属性</li> + <li>{{domxref("Animation.play()")}}, {{domxref("Animation.pause()")}}, {{domxref("Animation.finish()")}},这些方法可以设置一个动画的 <code>playState</code></li> +</ul> |