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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/element/requestfullscreen | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/element/requestfullscreen/index.html b/files/zh-cn/web/api/element/requestfullscreen/index.html new file mode 100644 index 0000000000..045a760246 --- /dev/null +++ b/files/zh-cn/web/api/element/requestfullscreen/index.html @@ -0,0 +1,177 @@ +--- +title: Element.requestFullscreen() +slug: Web/API/Element/requestFullScreen +translation_of: Web/API/Element/requestFullScreen +--- +<div>{{APIRef("Fullscreen API")}}</div> + +<p><code><strong>Element.requestFullscreen()</strong></code> 方法用于发出异步请求使元素进入全屏模式。</p> + +<p>调用此API并不能保证元素一定能够进入全屏模式。如果元素被允许进入全屏幕模式,返回的{{JSxRef("Promise")}}会resolve,并且该元素会收到一个{{event("fullscreenchange")}}事件,通知它已经进入全屏模式。如果全屏请求被拒绝,返回的promise会变成rejected并且该元素会收到一个{{Event('fullscreenerror')}}事件。如果该元素已经从原来的文档中分离,那么该文档将会收到这些事件。</p> + +<p>早期的Fullscreen API实现总是会把这些事件发送给document,而不是调用的元素,所以你自己可能需要处理这样的情况。参考 {{SectionOnPage("/zh-CN/docs/Web/Events/fullscreen", "Browser compatibility")}} 来得知哪些浏览器做了这个改动。</p> + +<div class="note"> +<p>注意:这个方法只能在用户交互或者设备方向改变的时候调用,否则将会失败。</p> +</div> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox"><em>var Promise = Element</em>.requestFullscreen(options); +</pre> + +<h3 id="参数">参数</h3> + +<p><code>options</code> {{optional_inline}}</p> + +<p>一个{{domxref("FullscreenOptions")}}对象提供切换到全屏模式的控制选项。目前,唯一的选项是{{domxref("FullscreenOptions.navigationUI", "navigationUI")}},这控制了是否在元素处于全屏模式时显示导航条UI。默认值是<code>"auto"</code>,表明这将由浏览器来决定是否显示导航条。</p> + +<h3 id="返回值">返回值</h3> + +<p>在完成切换全屏模式后,返回一个已经用值 <code>undefined</code> resolved的{{JSxRef("Promise")}}</p> + +<h3 id="异常">异常</h3> + +<p><em><code>requestFullscreen()</code> </em><em>通过拒绝返回的 <code>Promise</code>来生成错误条件,而不是抛出一个传统的异常。拒绝控制器接收以下的某一个值:</em></p> + +<dl> + <dt>{{jsxref("TypeError")}}</dt> + <dd>在以下几种情况下,会抛出<code>TypeError</code>:</dd> +</dl> + +<ul> + <li>文档中包含的元素未完全激活,也就是说不是当前活动的元素。</li> + <li>元素不在文档之内。</li> + <li>因为功能策略限制配置或其他访问控制,元素不被允许使用<code>"fullscreen"</code>功能。</li> + <li>元素和它的文档是同一个节点。 </li> +</ul> + +<dl> +</dl> + +<h2 id="示例">示例</h2> + +<p>在调用<code>requestFullScreen()之前,可以对</code>{{event("fullscreenchange")}} 和 {{event("fullscreenerror")}}事件进行监听,这样在请求进入全屏模式成功或者失败时都能收到事件通知。</p> + +<h2 id="API规格">API规格</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + </thead> + <tbody> + <tr> + <td>{{SpecName("Fullscreen", "#dom-element-requestfullscreen", "Element.requestFullScreen()")}}</td> + <td>{{Spec2("Fullscreen")}}</td> + <td>Initial definition</td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p>{{CompatibilityTable}}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Edge</th> + <th>Firefox</th> + <th>Internet Explorer</th> + <th>Edge</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatVersionUnknown}}{{property_prefix("webkit")}}<sup>[1]</sup></td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatGeckoDesktop("9.0")}} as <code>mozRequestFullScreen</code><sup>[2]</sup><br> + {{CompatGeckoDesktop("47.0")}} (behind full-screen-api.unprefix.enabled</td> + <td>11{{property_prefix("ms")}}<sup>[3]</sup></td> + <td>{{CompatVersionUnknown}}<sup>[3]</sup></td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Edge</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>{{CompatUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatGeckoMobile("9.0")}} as <code>mozRequestFullScreen</code><sup>[2]</sup><br> + {{CompatGeckoMobile("47.0")}} (behind full-screen-api.unprefix.enabled</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + <td>{{CompatUnknown}}</td> + </tr> + </tbody> +</table> +</div> + +<p>[1] 同样以<code>webkitRequestFullScreen方法实现。</code></p> + +<p>[2] 使用带有浏览器前缀的<code>mozRequestFullScreen方法实现。在火狐44之前版本,Gecko浏览器内核错误地允许frame里面元素以及object元素进入全屏模式。而在之后的版本,这个漏洞被修复:仅允许位于顶部文档(top-level document)的元素,以及拥有</code>{{htmlattrxref("allowfullscreen", "iframe")}}属性的iframe的内部元素进入全屏显示。. </p> + +<p>[3] 使用IE时,最后的screen的s为小写,也即ms<code>RequestFullscreen,否则无效</code></p> + +<p>[4] 谷歌浏览器前缀webkitRequestFullScreen()里最后的Screen的S也可以为小写s,建议写成驼峰命名法</p> + +<p>[5]将浏览器前缀兼容封装成函数</p> + +<pre>function toFullVideo(){ + + if(videoDom.requestFullscreen){ + + return videoDom.requestFullscreen(); + + }else if(videoDom.webkitRequestFullScreen){ + + return videoDom.webkitRequestFullScreen(); + + }else if(videoDom.mozRequestFullScreen){ + + return videoDom.mozRequestFullScreen(); + + }else{ + + return videoDom.msRequestFullscreen(); + + } + +}</pre> + +<p>[6] 详见 <a href="https://msdn.microsoft.com/en-us/library/dn254939%28v=vs.85%29.aspx">documentation on MSDN</a>.</p> + +<h2 id="参阅">参阅</h2> + +<ul> + <li><a href="/en-US/docs/Web/API/Fullscreen_API">Full-screen API</a></li> + <li>{{ domxref("Element.requestFullscreen()") }}</li> + <li>{{ domxref("Document.exitFullscreen()") }}</li> + <li>{{ domxref("Document.fullscreen") }}</li> + <li>{{ domxref("Document.fullscreenElement") }}</li> + <li>{{ cssxref(":fullscreen") }}</li> + <li>{{ HTMLAttrXRef("allowfullscreen", "iframe") }}</li> +</ul> |