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+---
+title: mask-image
+slug: Web/CSS/mask-image
+translation_of: Web/CSS/mask-image
+---
+<div>{{CSSRef}}{{SeeCompatTable}}</div>
+
+<h2 id="概要">概要</h2>
+
+<p><strong><code>mask-image</code></strong> <a href="/en-US/docs/Web/CSS">CSS</a>属性用于设置元素上遮罩层的图像。</p>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush:css">/* Keyword value */
+mask-image: none;
+
+/* &lt;mask-source&gt; value */
+mask-image: url(masks.svg#mask1);
+
+/* &lt;image&lt; values */
+mask-image: linear-gradient(rgba(0, 0, 0, 1.0), transparent);
+mask-image: image(url(mask.png), skyblue);
+
+/* Multiple values */
+mask-image: image(url(mask.png), skyblue), linear-gradient(rgba(0, 0, 0, 1.0), transparent);
+
+/* Global values */
+mask-image: inherit;
+mask-image: initial;
+mask-image: unset;
+</pre>
+
+<h3 id="Values">Values</h3>
+
+<dl>
+ <dt><code>none</code></dt>
+ <dd>默认值，透明的黑色图像层，也就是没有遮罩层。</dd>
+ <dt><code>&lt;mask-source&gt;</code></dt>
+ <dd><code>&lt;mask&gt;</code>或CSS图像的url</dd>
+ <dd>{{cssxref("&lt;image&gt;")}}</dd>
+ <dd>图片作为遮罩层</dd>
+</dl>
+
+<h3 id="Formal_syntax">Formal syntax</h3>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="例子">例子</h2>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css; highlight[5]">#masked {
+  width: 100px;
+  height: 100px;
+  background-color: #8cffa0;
+  mask-image: url(https://mdn.mozillademos.org/files/12676/star.svg);
+  -webkit-mask-image: url(https://mdn.mozillademos.org/files/12676/star.svg);
+}
+</pre>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div id="masked"&gt;&lt;/div&gt;
+</pre>
+
+<p>{{EmbedLiveSample('例子', '100px', '100px')}}</p>
+
+<h2 id="Specifications">Specifications</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("CSS Masks", "#the-mask-image", "mask-image")}}</td>
+   <td>{{Spec2("CSS Masks")}}</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>Firefox (Gecko)</th>
+   <th>Internet Explorer</th>
+   <th>Edge</th>
+   <th>Opera</th>
+   <th>Safari (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>1.0{{property_prefix("-webkit")}}<sup>[1]</sup></td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+   <td>4.0{{property_prefix("-webkit")}}<sup>[3]</sup></td>
+  </tr>
+  <tr>
+   <td>Multiple mask images</td>
+   <td>1.0{{property_prefix("-webkit")}}</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+   <td>4.0{{property_prefix("-webkit")}}</td>
+  </tr>
+  <tr>
+   <td>SVG masks</td>
+   <td>8.0</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+   <td>4.0{{property_prefix("-webkit")}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>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>2.1{{property_prefix("-webkit")}}<sup>[4]</sup></td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>3.2{{property_prefix("-webkit")}}<sup>[5]</sup></td>
+  </tr>
+  <tr>
+   <td>Multiple mask images</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+  </tr>
+  <tr>
+   <td>SVG masks</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+   <td>{{CompatNo}}<sup>[2]</sup></td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}{{property_prefix("-webkit")}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<p>[1] Implemented in version 8.0, Chrome initially only supported the <code>-webkit</code> prefixed versions of gradients as values. Later, support for the unprefixed versions was added.</p>
+
+<p>[2] This feature is not implemented yet. It is only available in Nightly and Dev Edition. See {{bug("1251161")}}.</p>
+
+<p>[3] Implemented in version 4.0, Safari initially only supported the <code>-webkit</code> prefixed versions of gradients as values.</p>
+
+<p>[4] Android initially only supported the <code>-webkit</code> prefixed versions of gradients as values.</p>
+
+<p>[5] iOS Safari initially only supported the <code>-webkit</code> prefixed versions of gradients as values.</p>