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+---
+title: break-after
+slug: Web/CSS/break-after
+tags:
+  - CSS
+  - CSS 属性
+  - 参考
+translation_of: Web/CSS/break-after
+---
+<div>{{CSSRef}}</div>
+
+<p><strong><code>break-after</code></strong> <a href="/en-US/docs/CSS">CSS</a> 属性描述在生成的盒子之后的页面，列或区域中断行为（换句话说，如何以及是否中断）。如果没有生成的盒子，则该属性将被忽略。</p>
+
+<pre class="brush:css no-line-numbers">/* Generic break values */
+break-after: auto;
+break-after: avoid;
+break-after: always;
+break-after: all;
+
+/* Page break values */
+break-after: avoid-page;
+break-after: page;
+break-after: left;
+break-after: right;
+break-after: recto;
+break-after: verso;
+
+/* Column break values */
+break-after: avoid-column;
+break-after: column;
+
+/* Region break values */
+break-after: avoid-region;
+break-after: region;
+
+/* Global values */
+break-after: inherit;
+break-after: initial;
+break-after: unset;
+</pre>
+
+<p>每个潜在的断点（亦即每个元素的边界）都受到三个属性的影响：上一个元素的 <code>break-after</code> 值、下一个元素的 <code>break-before</code> 值以及当前元素自身的 <code>break-inside</code> 值。</p>
+
+<p>以下规则被用于判断中断是否必要：</p>
+
+<ol>
+ <li>如果上述三个属性中，如果任何一个的值属于“强制中断”值，那么这个属性将被优先应用，此处所称“强制中断”的值为： <code>always</code>、 <code>left</code>、 <code>right</code>、 <code>page</code>、 <code>column</code> 和 <code>region</code>。If several of the concerned values is such a break, the one of the element that appears the latest in the flow is taken (that is the {{cssxref("break-before")}} value has precedence over the <code>break-after</code> value, which itself has precedence over the {{cssxref("break-inside")}} value).</li>
+ <li>If any of the three concerned values is an <em>avoid break value</em>, that is <code>avoid</code>, <code>avoid-page</code>, <code>avoid-region</code>, <code>avoid-column</code>, no such break will be applied at that point.</li>
+</ol>
+
+<p>Once forced breaks have been applied, soft breaks may be added if needed, but not on element boundaries that resolve in a corresponding <code>avoid</code> value.</p>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="语法">语法</h2>
+
+<p>The <code>break-after</code> property is specified as one of the keyword values from the list below.</p>
+
+<h3 id="属性值">属性值</h3>
+
+<h4 id="Generic_break_values">Generic break values</h4>
+
+<dl>
+ <dt><code>auto</code></dt>
+ <dd>Allows, but does not force, any break (page, column, or region) to be inserted right after the principal box.</dd>
+ <dt><code>avoid</code></dt>
+ <dd>Avoids any break (page, column, or region) from being inserted right after the principal box.</dd>
+ <dt><code>always</code> {{experimental_inline}}</dt>
+ <dd>Forces a page break right after the principal box. The type of this break is that of the immediately-containing fragmentation context. If we are inside a multicol container then it would force a column break, inside paged media (but not inside a multicol container) a page break.</dd>
+ <dt><code>all</code> {{experimental_inline}}</dt>
+ <dd>Forces a page break right after the principal box. Breaking through all possible fragmentation contexts. So a break inside a multicol container, which was inside a page container would force a column and page break.</dd>
+</dl>
+
+<h4 id="Page_break_values">Page break values</h4>
+
+<dl>
+ <dt><code>avoid-page</code></dt>
+ <dd>Avoids any page break right after the principal box.</dd>
+ <dt><code>page</code></dt>
+ <dd>Forces a page break right after the principal box.</dd>
+ <dt><code>left</code></dt>
+ <dd>Forces one or two page breaks right after the principal box, whichever will make the next page into a left page.</dd>
+ <dt><code>right</code></dt>
+ <dd>Forces one or two page breaks right after the principal box, whichever will make the next page into a right page.</dd>
+ <dt><code>recto</code> {{experimental_inline}}</dt>
+ <dd>Forces one or two page breaks right after the principal box, whichever will make the next page into a recto page. (A recto page is a right page in a left-to-right spread or a left page in a right-to-left spread.)</dd>
+ <dt><code>verso</code> {{experimental_inline}}</dt>
+ <dd>Forces one or two page breaks right after the principal box, whichever will make the next page into a verso page. (A verso page is a left page in a left-to-right spread or a left right in a right-to-left spread.)</dd>
+</dl>
+
+<h4 id="Column_break_values">Column break values</h4>
+
+<dl>
+ <dt><code>avoid-column</code></dt>
+ <dd>Avoids any column break right after the principal box.</dd>
+ <dt><code>column</code></dt>
+ <dd>Forces a column break right after the principal box.</dd>
+</dl>
+
+<h4 id="Region_break_values">Region break values</h4>
+
+<dl>
+ <dt><code>avoid-region</code> {{experimental_inline}}</dt>
+ <dd>Avoids any region break right after the principal box.</dd>
+ <dt><code>region</code> {{experimental_inline}}</dt>
+ <dd>Forces a region break right after the principal box.</dd>
+</dl>
+
+<h3 id="形式化语法">形式化语法</h3>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="Page_break_aliases">Page break aliases</h2>
+
+<p>For compatibility reasons, the legacy {{cssxref("page-break-after")}} property should be treated by browsers as an alias of <code>break-after</code>. This ensures that sites using <code>page-break-after</code> continue to work as designed. A subset of values should be aliased as follows:</p>
+
+<table>
+ <thead>
+  <tr>
+   <th scope="col">page-break-after</th>
+   <th scope="col">break-after</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td><code>auto</code></td>
+   <td><code>auto</code></td>
+  </tr>
+  <tr>
+   <td><code>left</code></td>
+   <td><code>left</code></td>
+  </tr>
+  <tr>
+   <td><code>right</code></td>
+   <td><code>right</code></td>
+  </tr>
+  <tr>
+   <td><code>avoid</code></td>
+   <td><code>avoid</code></td>
+  </tr>
+  <tr>
+   <td><code>always</code></td>
+   <td><code>page</code></td>
+  </tr>
+ </tbody>
+</table>
+
+<div class="blockIndicator note">
+<p>The <code>always</code> value of <code>page-break-*</code> was implemented by browsers as a page break, and not as a column break. Therefore the aliasing is to <code>page</code>, rather than the <code>always</code> value in the Level 4 spec.</p>
+</div>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">规范</th>
+   <th scope="col">状态</th>
+   <th scope="col">备注</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName('CSS3 Fragmentation', '#break-between', 'break-after')}}</td>
+   <td>{{Spec2('CSS3 Fragmentation')}}</td>
+   <td>Adds the <code>recto</code> and <code>verso</code> keywords. Changes the media type of this property from <code>paged</code> to {{xref_cssvisual}}. Defines the breaking algorithm with different kinds of breaks.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('CSS3 Regions', '#region-flow-break', 'break-after')}}</td>
+   <td>{{Spec2('CSS3 Regions')}}</td>
+   <td>Extends the property to handle region breaks. Adds the <code>avoid-region</code> and <code>region</code> keywords.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName('CSS3 Multicol', '#break-before-break-after-break-inside', 'break-after')}}</td>
+   <td>{{Spec2('CSS3 Multicol')}}</td>
+   <td>Initial definition. Extends the CSS 2.1 {{cssxref("page-break-after")}} property to handle both page and column breaks.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<h3 id="Support_in_multi-column_layout">Support in multi-column layout</h3>
+
+<p>{{Compat("css.properties.break-after.multicol_context")}}</p>
+
+<h3 id="Support_in_paged_media">Support in paged media</h3>
+
+<p>{{Compat("css.properties.break-after.paged_context")}}</p>