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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/htmlcanvaselement/height/index.html | |
parent | 8b66d724f7caf0157093fb09cfec8fbd0c6ad50a (diff) | |
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diff --git a/files/zh-cn/web/api/htmlcanvaselement/height/index.html b/files/zh-cn/web/api/htmlcanvaselement/height/index.html new file mode 100644 index 0000000000..a479e87d7e --- /dev/null +++ b/files/zh-cn/web/api/htmlcanvaselement/height/index.html @@ -0,0 +1,123 @@ +--- +title: HTMLCanvasElement.height +slug: Web/API/HTMLCanvasElement/height +translation_of: Web/API/HTMLCanvasElement/height +--- +<div> +<div> +<div>{{APIRef("Canvas API")}}</div> +</div> +</div> + +<p><strong><code><span>HTMLCanvasElement.height</span></code></strong> 属性是一个正<code>整数</code> ,使用了{{HTMLElement("canvas")}} 元素的HTML 属性{{htmlattrxref("height", "canvas")}}来反映该元素高度的 CSS 像素值。当该属性没有被定义,或被定义为一个无效值(如负值)时, 将使用<code>150</code>作为它的默认值。</p> + +<p>控制canvas元素大小的属性有两个,这是其中一个,还有一个是{{domxref("HTMLCanvasElement.width")}}。</p> + +<h2 id="Syntax" name="Syntax">语法</h2> + +<pre class="syntaxbox"><var>var <em>pxl</em> = <em>canvas</em></var>.height; +<em>canvas</em>.height = <em>pxl</em>; +</pre> + +<h2 id="示例">示例</h2> + +<p>给出这样一个{{HTMLElement("canvas")}} 元素:</p> + +<pre class="brush: html"><canvas id="canvas" width="300" height="300"></canvas> +</pre> + +<p>可以通过以下代码获得这个canvas元素的高度:</p> + +<pre class="brush: js">var canvas = document.getElementById('canvas'); +console.log(canvas.height); // 300 +</pre> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">规范</th> + <th scope="col">状态</th> + <th scope="col">备注</th> + </tr> + <tr> + <td>{{SpecName('HTML WHATWG', "scripting.html#attr-canvas-height", "HTMLCanvasElement.height")}}</td> + <td>{{Spec2('HTML WHATWG')}}</td> + <td>No change since the latest snapshot, {{SpecName('HTML5 W3C')}}</td> + </tr> + <tr> + <td>{{SpecName('HTML5.1', "scripting-1.html#attr-canvas-height", "HTMLCanvasElement.height")}}</td> + <td>{{Spec2('HTML5.1')}}</td> + <td> </td> + </tr> + <tr> + <td>{{SpecName('HTML5 W3C', "scripting-1.html#attr-canvas-height", "HTMLCanvasElement.height")}}</td> + <td>{{Spec2('HTML5 W3C')}}</td> + <td>Snapshot of the {{SpecName('HTML WHATWG')}} containing the 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 (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{ CompatChrome(4) }}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{ CompatGeckoDesktop("1.9.2") }}</td> + <td>{{ CompatIE(9) }}</td> + <td>{{ CompatOpera(9) }}</td> + <td>{{ CompatSafari(3.1) }}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Chrome for 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>{{ CompatVersionUnknown() }}</td> + <td>{{ CompatVersionUnknown() }}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{ CompatGeckoMobile("1.9.2") }}</td> + <td>{{ CompatVersionUnknown() }}</td> + <td>{{ CompatVersionUnknown() }}</td> + <td>{{ CompatVersionUnknown() }}</td> + </tr> + </tbody> +</table> +</div> + +<h2 id="See_Also" name="See_Also">其他</h2> + +<ul> + <li>定义的接口, {{domxref("HTMLCanvasElement")}}.</li> + <li>另一个控制canvas大小的属性, {{domxref("HTMLCanvasElement.width")}}.</li> +</ul> |