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<div id="app" data-server-rendered="true"><div class="theme-container vuepress-theme-fast"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div><a href="/zh/" class="home-link router-link-active"><img src="/logo@2x.svg" alt="WEEX" class="logo"></a><span class="version"><a href="/download/download.html" class="version-bg"><img src="/assets/img/version-bg.ab65ded9.svg" alt="v0.28"><span class="version-no">v0.28</span></a></span><div class="links"><form id="search-form" class="algolia-search-wrapper search-box"><input id="algolia-search-input" class="search-query"></form><nav class="nav-links can-hide"><div class="nav-item"><a href="/zh/guide/" class="nav-link">指南</a></div><div class="nav-item"><a href="/zh/docs/" class="nav-link router-link-active">文档</a></div><div class="nav-item"><a href="/zh/tools/" class="nav-link">第三方工具</a></div><div class="nav-item"><a href="/zh/download/" class="nav-link">下载</a></div><div class="nav-item"><a href="/zh/community/" class="nav-link">社区</a></div><div class="nav-item"><a href="/zh/blog/" class="nav-link">博客</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">选择语言</span><span class="arrow right"></span></a><ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----><a href="/docs/modules/dom.html" class="nav-link">English</a></li><li class="dropdown-item"><!----><a href="/zh/docs/modules/dom.html" class="nav-link router-link-exact-active router-link-active">简体中文</a></li></ul></div></div></nav><a href="https://github.com/apache/incubator-weex" target="_blank" rel="noopener noreferrer" class="repo-link"><img src="/assets/img/github.7cb484a9.svg" alt="github" class="github-icon"></a></div></header><div class="sidebar-mask"></div><div class="sidebar"><nav class="nav-links"><div class="nav-item"><a href="/zh/guide/" class="nav-link">指南</a></div><div class="nav-item"><a href="/zh/docs/" class="nav-link router-link-active">文档</a></div><div class="nav-item"><a href="/zh/tools/" class="nav-link">第三方工具</a></div><div class="nav-item"><a href="/zh/download/" class="nav-link">下载</a></div><div class="nav-item"><a href="/zh/community/" class="nav-link">社区</a></div><div class="nav-item"><a href="/zh/blog/" class="nav-link">博客</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">选择语言</span><span class="arrow right"></span></a><ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----><a href="/docs/modules/dom.html" class="nav-link">English</a></li><li class="dropdown-item"><!----><a href="/zh/docs/modules/dom.html" class="nav-link router-link-exact-active router-link-active">简体中文</a></li></ul></div></div></nav><ul class="sidebar-links"><li><div class="sidebar-group first"><p class="sidebar-heading"><span>API</span><!----></p><ul class="sidebar-group-items"><li><a href="/zh/docs/api/weex-variable.html" class="sidebar-link">Weex 环境变量</a></li><li><a href="/zh/docs/api/android-apis.html" class="sidebar-link">Android 接口</a></li><li><a href="/zh/docs/api/ios-apis.html" class="sidebar-link">iOS 接口</a></li><li><a href="/zh/docs/api/js-service.html" class="sidebar-link">JS 服务</a></li><li><a href="/zh/docs/api/broadcast-channel.html" class="sidebar-link">跨页面通信</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>内置组件</span><!----></p><ul class="sidebar-group-items"><li><a href="/zh/docs/components/a.html" class="sidebar-link">&lt;a&gt;</a></li><li><a href="/zh/docs/components/div.html" class="sidebar-link">&lt;div&gt;</a></li><li><a href="/zh/docs/components/text.html" class="sidebar-link">&lt;text&gt;</a></li><li><a href="/zh/docs/components/image.html" class="sidebar-link">&lt;image&gt;</a></li><li><a href="/zh/docs/components/list.html" class="sidebar-link">&lt;list&gt;</a></li><li><a href="/zh/docs/components/cell.html" class="sidebar-link">&lt;cell&gt;</a></li><li><a href="/zh/docs/components/loading.html" class="sidebar-link">&lt;loading&gt;</a></li><li><a href="/zh/docs/components/refresh.html" class="sidebar-link">&lt;refresh&gt;</a></li><li><a href="/zh/docs/components/recycle-list.html" class="sidebar-link">&lt;recycle-list&gt;</a></li><li><a href="/zh/docs/components/scroller.html" class="sidebar-link">&lt;scroller&gt;</a></li><li><a href="/zh/docs/components/slider.html" class="sidebar-link">&lt;slider&gt;</a></li><li><a href="/zh/docs/components/indicator.html" class="sidebar-link">&lt;indicator&gt;</a></li><li><a href="/zh/docs/components/textarea.html" class="sidebar-link">&lt;textarea&gt;</a></li><li><a href="/zh/docs/components/input.html" class="sidebar-link">&lt;input&gt;</a></li><li><a href="/zh/docs/components/waterfall.html" class="sidebar-link">&lt;waterfall&gt;</a></li><li><a href="/zh/docs/components/video.html" class="sidebar-link">&lt;video&gt;</a></li><li><a href="/zh/docs/components/web.html" class="sidebar-link">&lt;web&gt;</a></li><li><a href="/zh/docs/components/richtext.html" class="sidebar-link">&lt;richtext&gt;</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading open"><span>内置模块</span><!----></p><ul class="sidebar-group-items"><li><a href="/zh/docs/modules/animation.html" class="sidebar-link">animation</a></li><li><a href="/zh/docs/modules/clipboard.html" class="sidebar-link">clipboard</a></li><li><a href="/zh/docs/modules/dom.html" class="active sidebar-link">dom</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/zh/docs/modules/dom.html#scrolltoelement" class="sidebar-link">scrollToElement</a></li><li class="sidebar-sub-header"><a href="/zh/docs/modules/dom.html#getcomponentrect" class="sidebar-link">getComponentRect</a></li><li class="sidebar-sub-header"><a href="/zh/docs/modules/dom.html#getlayoutdirection" class="sidebar-link">getLayoutDirection</a></li><li class="sidebar-sub-header"><a href="/zh/docs/modules/dom.html#addrule" class="sidebar-link">addRule</a></li></ul></li><li><a href="/zh/docs/modules/globalEvent.html" class="sidebar-link">globalEvent</a></li><li><a href="/zh/docs/modules/meta.html" class="sidebar-link">meta</a></li><li><a href="/zh/docs/modules/modal.html" class="sidebar-link">modal</a></li><li><a href="/zh/docs/modules/navigator.html" class="sidebar-link">navigator</a></li><li><a href="/zh/docs/modules/picker.html" class="sidebar-link">picker</a></li><li><a href="/zh/docs/modules/storage.html" class="sidebar-link">storage</a></li><li><a href="/zh/docs/modules/stream.html" class="sidebar-link">stream</a></li><li><a href="/zh/docs/modules/webview.html" class="sidebar-link">webview</a></li><li><a href="/zh/docs/modules/websockets.html" class="sidebar-link">webSockets</a></li><li><a href="/zh/docs/modules/deviceInfo.html" class="sidebar-link">deviceInfo</a></li><li><a href="/zh/docs/modules/console-log.html" class="sidebar-link">console-log</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>样式</span><!----></p><ul class="sidebar-group-items"><li><a href="/zh/docs/styles/common-styles.html" class="sidebar-link">通用样式</a></li><li><a href="/zh/docs/styles/text-styles.html" class="sidebar-link">文本样式</a></li><li><a href="/zh/docs/styles/css-units.html" class="sidebar-link">CSS 单位</a></li><li><a href="/zh/docs/styles/color-name.html" class="sidebar-link">颜色值</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>事件</span><!----></p><ul class="sidebar-group-items"><li><a href="/zh/docs/events/common-events.html" class="sidebar-link">通用事件</a></li><li><a href="/zh/docs/events/event-bubbling.html" class="sidebar-link">事件冒泡</a></li><li><a href="/zh/docs/events/gesture.html" class="sidebar-link">手势</a></li></ul></div></li></ul></div><div class="page"><div class="content"><h1 id="dom"><a href="#dom" class="header-anchor">#</a> dom</h1><p><code>dom</code> 模块用于对 weex 页面里的组件节点进行一部分特定操作。</p><ul><li><code>scrollToElement</code>
将 list 的某个子节点滚动到当前视口</li><li><code>getComponentRect</code>
获取某个组件的 bounding rect 布局信息</li><li><code>addRule</code>
添加 font-face rule</li><li><code>getLayoutDirection</code><span class="badge warn middle">0.20.0+</span>
获取某个组件的布局方向(rtl、lrt、inherit)</li></ul><h1 id="api"><a href="#api" class="header-anchor">#</a> API</h1><h2 id="scrolltoelement"><a href="#scrolltoelement" class="header-anchor">#</a> scrollToElement</h2><p>让页面滚动到 ref 对应的组件,这个 API 只能用于可滚动组件的子节点,例如 <code>&lt;scroller&gt;</code><code>&lt;list&gt;</code>, <code>&lt;waterfall&gt;</code> 等可滚动组件中。</p><h4 id="scrolltoelement-ref-options"><a href="#scrolltoelement-ref-options" class="header-anchor">#</a> scrollToElement(ref, options)</h4><ul><li><strong>@ref</strong>,要滚动到的那个节点。</li><li><strong>@options</strong><ul><li><strong><code>offset</code></strong>,一个到其可见位置的偏移距离,默认是 <code>0</code></li><li><strong><code>animated</code></strong>,是否需要附带滚动动画,默认是 true。</li></ul></li></ul><p><a href="http://dotwe.org/vue/56e0d256cbb26facd958dbd6424f42b2" target="_blank" rel="noopener noreferrer">示例<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></p><h2 id="getcomponentrect"><a href="#getcomponentrect" class="header-anchor">#</a> getComponentRect</h2><p>获取某个元素 View 的外框。</p><h4 id="getcomponentrect-ref-callback"><a href="#getcomponentrect-ref-callback" class="header-anchor">#</a> getComponentRect(ref, callback)</h4><ul><li><strong>@ref</strong>,要获取外框的那个节点。</li><li><strong>@callback</strong>,异步方法,通过回调返回信息。</li></ul><p>回调方法中的数据样例:</p><div class="language-javascript extra-class"><pre class="language-javascript"><code><span class="token punctuation">{</span>
result<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
size<span class="token punctuation">:</span> <span class="token punctuation">{</span>
bottom<span class="token punctuation">:</span> <span class="token number">60</span><span class="token punctuation">,</span>
height<span class="token punctuation">:</span> <span class="token number">15</span><span class="token punctuation">,</span>
left<span class="token punctuation">:</span> <span class="token number">0</span><span class="token punctuation">,</span>
right<span class="token punctuation">:</span> <span class="token number">353</span><span class="token punctuation">,</span>
top<span class="token punctuation">:</span> <span class="token number">45</span><span class="token punctuation">,</span>
width<span class="token punctuation">:</span> <span class="token number">353</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre></div><div class="tip custom-block"><p class="custom-block-title">TIP</p><p>如果要获取 viewport 的包围框,第一个参数 <code>ref</code> 可以指定为 <code>'viewport'</code></p></div><p><a href="http://dotwe.org/vue/d69ec16302e06300096c7285baef538a" target="_blank" rel="noopener noreferrer">Demo<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></p><div class="tip custom-block"><p class="custom-block-title">TIP</p><ul><li>此方法需要在节点渲染后调用才能获取正确的信息,可在 <code>mounted</code> 或 更新数据后 <code>updated</code> 中调用</li><li>如果想要获取到 Weex 视口容器的布局信息,可以指定 ref 为字符串 'viewport',即 getComponentRect('viewport', callback).</li></ul></div><h2 id="getlayoutdirection"><a href="#getlayoutdirection" class="header-anchor">#</a> getLayoutDirection <span class="badge warn middle">0.20.0+</span></h2><p>获取当前的布局方向,是 Left to Right,还是 Right to Left。</p><h4 id="getlayoutdirection-ref-callback"><a href="#getlayoutdirection-ref-callback" class="header-anchor">#</a> getLayoutDirection(ref, callback)</h4><ul><li><strong>@ref</strong>,要操作的节点。</li><li><strong>@callback</strong>,回调方法中返回排版方向信息。</li></ul><p>callback方法返回数据样例:</p><div class="language-json extra-class"><pre class="language-json"><code><span class="token punctuation">{</span>
<span class="token property">&quot;result&quot;</span><span class="token operator">:</span> <span class="token string">&quot;rtl&quot;</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>
</code></pre></div><p>示例</p><div class="language-javascript extra-class"><pre class="language-javascript"><code><span class="token keyword">const</span> element <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>$refs<span class="token punctuation">[</span><span class="token string">'kkk'</span><span class="token punctuation">]</span><span class="token punctuation">[</span><span class="token number">0</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
dom<span class="token punctuation">.</span><span class="token function">getLayoutDirection</span><span class="token punctuation">(</span>element<span class="token punctuation">,</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">ret</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>ret<span class="token punctuation">.</span>result<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><h2 id="addrule"><a href="#addrule" class="header-anchor">#</a> addRule <span class="badge warn middle">0.12.0+</span></h2><p>Weex 提供 <strong>DOM.addRule</strong> 以加载自定义字体。开发者可以通过指定 <strong>font-family</strong>加载 <em>iconfont</em><em>custom font</em></p><p>开发者可以使用下面的代码加载自定义字体:</p><div class="language-javascript extra-class"><pre class="language-javascript"><code><span class="token keyword">const</span> domModule <span class="token operator">=</span> weex<span class="token punctuation">.</span><span class="token function">requireModule</span><span class="token punctuation">(</span><span class="token string">'dom'</span><span class="token punctuation">)</span>
domModule<span class="token punctuation">.</span><span class="token function">addRule</span><span class="token punctuation">(</span><span class="token string">'fontFace'</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>
<span class="token string">'fontFamily'</span><span class="token punctuation">:</span> <span class="token string">&quot;iconfont2&quot;</span><span class="token punctuation">,</span>
<span class="token string">'src'</span><span class="token punctuation">:</span> <span class="token string">&quot;url('http://at.alicdn.com/t/font_1469606063_76593.ttf')&quot;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre></div><h4 id="addrule-type-contentobject"><a href="#addrule-type-contentobject" class="header-anchor">#</a> addRule(type, contentObject)</h4><ul><li><strong>@fontFace</strong> 协议名称,不可修改。</li><li><strong>@fontFamily</strong> font-family的名称。</li><li><strong>@src</strong> 字体地址,url('') 是保留字段,其参数如下:
<ul><li><strong><code>http</code></strong>. 从HTTP请求加载, e.g. <code>url('http://at.alicdn.com/t/font_1469606063_76593.ttf')</code></li><li><strong><code>https</code></strong>. 从HTTPS请求加载, e.g. <code>url('https://at.alicdn.com/t/font_1469606063_76593.ttf')</code></li><li><strong><code>local</code></strong>, <em>Android ONLY</em>. 从assets目录读取, e.g. <code>url('local://foo.ttf')</code>, <strong>foo.ttf</strong> 是文件名在你的assets目录中.</li><li><strong><code>file</code></strong>. 从本地文件读取, e.g. <code>url('file://storage/emulated/0/Android/data/com.alibaba.weex/cache/http:__at.alicdn.com_t_font_1469606063_76593.ttf')</code></li><li><strong><code>data</code></strong>. 从base64读取, e.g. <code>url('data:font/truetype;charset=utf-8;base64,AAEAAAALAIAAAwAwR1NVQrD+....')</code>, 上述data字段不全。</li></ul></li></ul><div class="warning custom-block"><p class="custom-block-title">注意</p><p><code>addRule</code> 方法里的 <code>fontFamily</code> 可以随意取。这个名字不是字体真正的名字。字体真正的名字(font-family),也就是注册到系统中的名字是保存在字体二进制文件中的。你需要确保你使用的字体的真正名字(font-family)足够特殊,否则在向系统注册时可能发生冲突,导致注册失败,你的字符被显示为‘?’。</p><p>如果你使用 http://www.iconfont.cn/ 来构建你的 iconfont。确保在项目设置中,设置一个特殊的 font-family 名字。默认是 “iconfont”,但极大可能发生冲突。</p><p>调用<code>addRule</code><code>beforeCreate</code> 中是被推荐的。</p></div><p><a href="http://dotwe.org/vue/7e328ee2ac9b7205c9ee37f4e509263d" target="_blank" rel="noopener noreferrer">示例<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a>.</p></div><div class="page-nav"><p class="inner"><span class="prev">
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