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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>
{{csssyntax}}
<h2 id="示例">示例</h2>
<h3 id="HTML">HTML</h3>
<pre class="brush: html"><div id="grid">
<div id="item1"></div>
<div id="item2"></div>
<div id="item3"></div>
<div id="item4"></div>
<div id="item5"></div>
</div>
<select id="direction" onchange="changeGridAutoFlow()">
<option value="column">column</option>
<option value="row">row</option>
</select>
<input id="dense" type="checkbox" onchange="changeGridAutoFlow()">
<label for="dense">dense</label>
</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 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>
|
