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+---
+title: HTMLImageElement.referrerPolicy
+slug: Web/API/HTMLImageElement/referrerPolicy
+translation_of: Web/API/HTMLImageElement/referrerPolicy
+---
+<div>{{APIRef}}{{SeeCompatTable}}</div>
+
+
+
+<p><code><strong>HTMLImageElement</strong></code><strong><code>.referrerPolicy</code></strong> 反映了 {{HTMLElement("img")}} 元素的HTML属性 {{htmlattrxref("referrerpolicy","img")}} 的定义,这个属性定义了{{HTMLElement("img")}} 元素在获取资源时的引用方式。</p>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox"><var>refStr</var> = <var>imgElt</var>.referrerPolicy;
+<var>imgElt</var>.referrerPolicy = <var>refStr</var>;</pre>
+
+<h3 id="值">值</h3>
+
+<dl>
+ <dd>
+ <ul>
+ <li><code>"no-referrer"</code> 表示HTTP头部信息将不会发送 <code>referrer</code> 。</li>
+ <li><code>"origin"</code> 表示 referrer 只包含策略、主机名、端口等页面源的信息。</li>
+ <li><code>"unsafe-url"</code> 这意味着引用者将包括源站和路径(但不包括片段、密码或用户名)。这种情况是不安全的,因为它可能会泄漏路径信息,这些信息已被使用TLS隐藏到第三方。</li>
+ </ul>
+ </dd>
+</dl>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush: js;highlight:[3]">var img = new Image();
+img.src = 'img/logo.png';
+img.referrerPolicy = 'origin';
+
+var div = document.getElementById('divAround');
+div.appendChild(img); // Fetch the image using the origin as the referrer
+</pre>
+
+<h2 id="Specifications" name="Specifications">规范</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('Referrer Policy', '#referrer-policy-delivery-referrer-attribute', 'referrerPolicy attribute')}}</td>
+ <td>{{Spec2('Referrer Policy')}}</td>
+ <td>Added the <code>referrerPolicy</code> property.</td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">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 (WebKit)</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatChrome("51")}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatGeckoDesktop("50.0")}} [1]</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatOpera("38")}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+ <tr>
+ <th>Feature</th>
+ <th>Android Webview</th>
+ <th>Chrome for Android</th>
+ <th>Firefox Mobile (Gecko)</th>
+ <th>IE Phone</th>
+ <th>Opera Mobile</th>
+ <th>Safari Mobile</th>
+ </tr>
+ <tr>
+ <td>Basic support</td>
+ <td>{{CompatChrome("51")}}</td>
+ <td>{{CompatChrome("51")}}</td>
+ <td>{{CompatGeckoMobile("50.0")}} [1]</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ <td>{{CompatUnknown}}</td>
+ </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] 从火狐45到50,这都是在network.http.enableperelementerfer首选项之后。从火狐42到44,这个属性被称为referer。</p>
+
+<h2 id="相关">相关</h2>
+
+<ul>
+ <li>{{domxref("HTMLAnchorElement.referrerPolicy")}}, {{domxref("HTMLAreaElement.referrerPolicy")}}, and {{domxref("HTMLIFrameElement.referrerPolicy")}}.</li>
+</ul>