files/zh-cn/web/api/htmlimageelement/image/index.html


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---
title: Image()
slug: Web/API/HTMLImageElement/Image
tags:
  - 图片对象
translation_of: Web/API/HTMLImageElement/Image
---
<div>{{ APIRef("HTML DOM") }}</div>

<p><strong><code>Image()</code></strong>函数将会创建一个新的{{domxref("HTMLImageElement")}}实例。</p>

<p>它的功能等价于 {{domxref("Document.createElement()", "document.createElement('img')")}}</p>

<h2 id="语法">语法</h2>

<pre class="syntaxbox">Image(width, height)</pre>

<h3 id="参数">参数</h3>

<dl>
 <dt>width</dt>
 <dd>图片的宽度 (即 {{htmlattrxref("width", "img")}} 属性).</dd>
 <dt>height</dt>
 <dd>图片的高度 (即 {{htmlattrxref("height", "img")}} 属性).</dd>
</dl>

<h2 id="示例"><span style="line-height: 1.572;">示例</span></h2>

<pre class="brush: js">var myImage = new Image(100, 200);
myImage.src = 'picture.jpg';
document.body.appendChild(myImage);</pre>

<div>上面的代码相当于在 {{htmlelement("body")}}中定义了下面的HTML:</div>

<pre class="brush: html">&lt;img width="100" height="200" src="picture.jpg"&gt;
</pre>

<div class="note">
<p><strong>Note</strong>: 无论构造函数中指定的大小是多少，都会加载整个位图. 如果在构造时指定了尺寸信息，那么将会反应在实例的 {{domxref("HTMLImageElement.width")}} 和 {{domxref("HTMLImageElement.height")}} 属性上。图像自身的CSS像素值将会反应在{{domxref("HTMLImageElement.naturalWidth")}} 和 {{domxref("HTMLImageElement.naturalHeight")}}属性。如果没有指定值，那么两个属性的值相同</p>
</div>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName("HTML WHATWG", "embedded-content.html#dom-image", "Image()")}}</td>
   <td>{{spec2("HTML WHATWG")}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>

<h2 id="兼容性">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>支持情况</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</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>Firefox Mobile (Gecko)</th>
   <th>IE Phone</th>
   <th>Opera Mobile</th>
   <th>Safari Mobile</th>
   <th>Chrome for Android</th>
  </tr>
  <tr>
   <td>支持情况</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
   <td>{{compatversionunknown}}</td>
  </tr>
 </tbody>
</table>
</div>