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+---
+title: grid-auto-flow
+slug: Web/CSS/grid-auto-flow
+tags:
+  - CSS
+  - CSS 属性
+  - CSS 网格
+translation_of: Web/CSS/grid-auto-flow
+---
+<p><strong><code>grid-auto-flow</code></strong> 属性控制着自动布局算法怎样运作，精确指定在网格中被自动布局的元素怎样排列。</p>
+
+<div>{{EmbedInteractiveExample("pages/css/grid-auto-flow.html")}}</div>
+
+
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush: css no-line-numbers">/* Keyword values */
+grid-auto-flow: row;
+grid-auto-flow: column;
+grid-auto-flow: dense;
+grid-auto-flow: row dense;
+grid-auto-flow: column dense;
+
+/* Global values */
+grid-auto-flow: inherit;
+grid-auto-flow: initial;
+grid-auto-flow: unset;</pre>
+
+<p>此属性有两种形式：</p>
+
+<ul>
+ <li>单个关键字：<code>row</code>、<code>column</code>，或 <code>dense</code> 中的一个。</li>
+ <li>两个关键字：<code>row dense</code> 或 <code>column dense</code>。</li>
+</ul>
+
+<h3 id="取值">取值</h3>
+
+<dl>
+ <dt><code>row</code></dt>
+ <dd>该关键字指定自动布局算法按照通过逐行填充来排列元素，在必要时增加新行。如果既没有指定 <code>row</code> 也没有 <code>column</code>，则默认为 <code>row</code>。</dd>
+ <dt><code>column</code></dt>
+ <dd>该关键字指定自动布局算法通过逐列填充来排列元素，在必要时增加新列。</dd>
+ <dt><code>dense</code></dt>
+ <dd>该关键字指定自动布局算法使用一种“稠密”堆积算法，如果后面出现了稍小的元素，则会试图去填充网格中前面留下的空白。这样做会填上稍大元素留下的空白，但同时也可能导致原来出现的次序被打乱。</dd>
+ <dd>
+ <p>如果省略它，使用一种「稀疏」算法，在网格中布局元素时，布局算法只会「向前」移动，永远不会倒回去填补空白。这保证了所有自动布局元素「按照次序」出现，即使可能会留下被后面元素填充的空白。</p>
+ </dd>
+</dl>
+
+<h3 id="正式语法">正式语法</h3>
+
+<pre class="syntaxbox">{{csssyntax}}</pre>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div id="grid"&gt;
+  &lt;div id="item1"&gt;&lt;/div&gt;
+  &lt;div id="item2"&gt;&lt;/div&gt;
+  &lt;div id="item3"&gt;&lt;/div&gt;
+  &lt;div id="item4"&gt;&lt;/div&gt;
+  &lt;div id="item5"&gt;&lt;/div&gt;
+&lt;/div&gt;
+&lt;select id="direction" onchange="changeGridAutoFlow()"&gt;
+  &lt;option value="column"&gt;column&lt;/option&gt;
+  &lt;option value="row"&gt;row&lt;/option&gt;
+&lt;/select&gt;
+&lt;input id="dense" type="checkbox" onchange="changeGridAutoFlow()"&gt;
+&lt;label for="dense"&gt;dense&lt;/label&gt;
+</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css; highlight[7]">#grid {
+  height: 200px;
+  width: 200px;
+  display: grid;
+  grid-gap: 10px;
+  grid-template: repeat(4, 1fr) / repeat(2, 1fr);
+  grid-auto-flow: column;  /* or 'row', 'row dense', 'column dense' */
+}
+
+#item1 {
+  background-color: lime;
+  grid-row-start: 3;
+}
+
+#item2 {
+  background-color: yellow;
+}
+
+#item3 {
+  background-color: blue;
+}
+
+#item4 {
+  grid-column-start: 2;
+  background-color: red;
+}
+
+#item5 {
+  background-color: aqua;
+}</pre>
+
+<pre class="brush: js; hidden">function changeGridAutoFlow() {
+  var grid = document.getElementById("grid");
+  var direction = document.getElementById("direction");
+  var dense = document.getElementById("dense");
+  var gridAutoFlow = direction.value === "row" ? "row" : "column";
+
+  if (dense.checked) {
+    gridAutoFlow += " dense";
+  }
+
+  grid.style.gridAutoFlow = gridAutoFlow;
+}</pre>
+
+<p>{{EmbedLiveSample("示例", "200px", "230px")}}</p>
+
+<h2 id="规范">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("CSS3 Grid", "#propdef-grid-auto-flow", "grid-auto-flow")}}</td>
+   <td>{{Spec2("CSS3 Grid")}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<p>{{cssinfo}}</p>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("css.properties.grid-auto-flow")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li>Related CSS properties: {{cssxref("grid-auto-rows")}}, {{cssxref("grid-auto-columns")}}, {{cssxref("grid")}}</li>
+ <li>Grid Layout Guide: <em><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Auto-placement_in_CSS_Grid_Layout">Auto-placement in grid layout</a></em></li>
+ <li>Video tutorial: <em><a href="http://gridbyexample.com/video/series-auto-placement-order/">Introducing Grid auto-placement and order</a></em></li>
+</ul>
+
+<section class="Quick_links" id="Quick_Links">
+<ol>
+ <li><a href="/en-US/docs/Web/CSS"><strong>CSS</strong></a></li>
+ <li><a href="/en-US/docs/Web/CSS/Reference"><strong>CSS Reference</strong></a></li>
+ <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout">CSS Grid Layout</a></li>
+ <li data-default-state="open"><a href="#"><strong>Guides</strong></a>
+  <ol>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Basic_Concepts_of_Grid_Layout">Basics concepts of grid layout</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Relationship_of_Grid_Layout">Relationship to other layout methods</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Line-based_Placement_with_CSS_Grid">Line-based placement</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Grid_Template_Areas">Grid template areas</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Layout_using_Named_Grid_Lines">Layout using named grid lines</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Auto-placement_in_CSS_Grid_Layout">Auto-placement in grid layout</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Box_Alignment_in_CSS_Grid_Layout">Box alignment in grid layout</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/CSS_Grid,_Logical_Values_and_Writing_Modes">Grids, logical values and writing modes</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/CSS_Grid_Layout_and_Accessibility">CSS Grid Layout and Accessibility</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/CSS_Grid_and_Progressive_Enhancement">CSS Grid Layout and Progressive Enhancement</a></li>
+   <li><a href="/en-US/docs/Web/CSS/CSS_Grid_Layout/Realizing_common_layouts_using_CSS_Grid_Layout">Realizing common layouts using grids</a></li>
+  </ol>
+ </li>
+ <li data-default-state="open"><a href="#"><strong>Properties</strong></a>
+  <ol>
+   <li><a href="/en-US/docs/Web/CSS/grid">grid</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-area">grid-area</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-auto-columns">grid-auto-columns</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-auto-flow">grid-auto-flow</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-auto-rows">grid-auto-rows</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-column">grid-column</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-column-end">grid-column-end</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-column-gap">grid-column-gap</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-column-start">grid-column-start</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-gap">grid-gap</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-row">grid-row</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-row-end">grid-row-end</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-row-gap">grid-row-gap</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-row-start">grid-row-start</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-template">grid-template</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-template-areas">grid-template-areas</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-template-columns">grid-template-columns</a></li>
+   <li><a href="/en-US/docs/Web/CSS/grid-template-rows">grid-template-rows</a></li>
+  </ol>
+ </li>
+ <li data-default-state="open"><a href="#"><strong>Glossary</strong></a>
+  <ol>
+   <li><a href="/en-US/docs/Glossary/Grid_lines">Grid lines</a></li>
+   <li><a href="/en-US/docs/Glossary/Grid_tracks">Grid tracks</a></li>
+   <li><a href="/en-US/docs/Glossary/Grid_cell">Grid cell</a></li>
+   <li><a href="/en-US/docs/Glossary/Grid_areas">Grid areas</a></li>
+   <li><a href="/en-US/docs/Glossary/Gutters">Gutters</a></li>
+   <li><a href="/en-US/docs/Glossary/Grid_rows">Grid row</a></li>
+   <li><a href="/en-US/docs/Glossary/Grid_column">Grid column</a></li>
+  </ol>
+ </li>
+</ol>
+</section>