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justify-content 属性,...</a></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_3-8-grid-auto" class="sidebar-link">3.8 grid-auto-...</a></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_3-9-grid-template-属性,grid-属性" class="sidebar-link">3.9 grid-template 属性,grid 属性</a></li></ul></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#四、项目属性" class="sidebar-link">四、项目属性</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_4-1-grid-column" class="sidebar-link">4.1 grid-column...</a></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_4-2-grid-column-属性,grid-row-属性" class="sidebar-link">4.2 grid-column 属性,grid-row 属性</a></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_4-3-grid-area-属性" class="sidebar-link">4.3 grid-area 属性</a></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#_4-4-justify-self-属性" class="sidebar-link">4.4 justify-self 属性...</a></li></ul></li><li class="sidebar-sub-header"><a href="/CSS/2019_04_11_01.html#五、参考链接" class="sidebar-link">五、参考链接</a></li></ul></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="grid-布局教程"><a href="#grid-布局教程" class="header-anchor">#</a> Grid 布局教程</h1> <p>作者: 阮一峰</p> <p>日期: 2019年3月25日</p> <h2 id="一、概述"><a href="#一、概述" class="header-anchor">#</a> 一、概述</h2> <p>网格布局(Grid)是最强大的 CSS 布局方案。</p> <p>它将网页划分成一个个网格,可以任意组合不同的网格,做出各种各样的布局。以前,只能通过复杂的 CSS 框架达到的效果,现在浏览器内置了。</p> <div data-v-43194dd2><div class="container one" data-v-43194dd2><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>上图这样的布局,就是 <code>Grid</code> 布局的拿手好戏。</p> <p><code>Grid</code> 布局与 <code>Flex</code> 布局有一定的相似性,都可以指定容器内部多个项目的位置。但是,它们也存在重大区别。</p> <p><code>Flex</code> 布局是轴线布局,只能指定"项目"针对轴线的位置,可以看作是一维布局。<code>Grid</code> 布局则是将容器划分成"行"和"列",产生单元格,然后指定"项目所在"的单元格,可以看作是二维布局。<code>Grid</code> 布局远比 <code>Flex</code> 布局强大。</p> <h2 id="二、基本概念"><a href="#二、基本概念" class="header-anchor">#</a> 二、基本概念</h2> <p>学习 Grid 布局之前,需要了解一些基本概念。</p> <h3 id="_2-1-容器和项目"><a href="#_2-1-容器和项目" class="header-anchor">#</a> 2.1 容器和项目</h3> <p>采用网格布局的区域,称为"容器"(container)。容器内部采用网格定位的子元素,称为"项目"(item)。</p> <div class="language-html line-numbers-mode"><pre class="language-html"><code><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>1<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>2<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>p</span><span class="token punctuation">></span></span>3<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>p</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
- <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><p>上面代码中,最外层的<code><div></code>元素就是容器,内层的三个<code><div></code>元素就是项目。</p> <p>注意:项目只能是容器的顶层子元素,不包含项目的子元素,比如上面代码的</p><p>元素就不是项目。Grid 布局只对项目生效。</p> <h3 id="_2-2-行和列"><a href="#_2-2-行和列" class="header-anchor">#</a> 2.2 行和列</h3> <p>容器里面的水平区域称为"行"(row),垂直区域称为"列"(column)。</p> <div class=" two"><div class="row">1</div> <div class="colums">1</div> <div class="container"><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></div></div> <p>上图中,水平的深色区域就是"行",垂直的深色区域就是"列"。</p> <h3 id="_2-3-单元格"><a href="#_2-3-单元格" class="header-anchor">#</a> 2.3 单元格</h3> <p>行和列的交叉区域,称为"单元格"(cell)。</p> <p>正常情况下,<code>n</code>行和<code>m</code>列会产生<code>n x m</code>个单元格。比如,3行3列会产生9个单元格。</p> <h3 id="_2-4-网格线"><a href="#_2-4-网格线" class="header-anchor">#</a> 2.4 网格线</h3> <p>划分网格的线,称为"网格线"(grid line)。水平网格线划分出行,垂直网格线划分出列。</p> <p>正常情况下,<code>n</code>行有<code>n + 1</code>根水平网格线,<code>m</code>列有<code>m + 1</code>根垂直网格线,比如三行就有四根水平网格线。</p> <div class="three"><div class="bg-green"></div> <div class="bg-line"></div> <div class="container"><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><div class="one"><div class="left">
- Line 1
- </div> <div class="top">
- Line 1
- </div></div> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <div><div class="top">
- Line 2
- </div></div> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <!----> <div><div class="top">
- Line 3
- </div></div> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <!----> <!----> <div><div class="top">
- Line 4
- </div> <div class="right">
- Line 5
- </div></div> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <!----> <!----> <!----> <div><div class="left">
- Line 2
- </div></div> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <!----> <!----> <!----> <!----> <div><div class="left">
- Line 3
- </div></div> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other"><!----> <!----> <!----> <!----> <!----> <!----> <div><div class="left">
- Line 4
- </div> <div class="bottom">
- Line 6
- </div></div></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div><div><div class="bg"></div> <div class="row"></div> <div class="colums"></div> <div class="other" style="display:none;"><!----> <!----> <!----> <!----> <!----> <!----> <!----></div></div></div></div> <p>上图是一个 4 x 4 的网格,共有5根水平网格线和5根垂直网格线。</p> <h2 id="三、容器属性"><a href="#三、容器属性" class="header-anchor">#</a> 三、容器属性</h2> <p>Grid 布局的属性分成两类。一类定义在容器上面,称为容器属性;另一类定义在项目上面,称为项目属性。这部分先介绍容器属性。</p> <h3 id="_3-1-display-属性"><a href="#_3-1-display-属性" class="header-anchor">#</a> 3.1 display 属性</h3> <p><code>display: grid</code>指定一个容器采用网格布局。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">div</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>foo
- <div class="four" data-v-61a70643><div class="container" data-v-61a70643><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div>
- bar</p> <p>默认情况下,容器元素都是块级元素,但也可以设成行内元素。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">div</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> inline-grid<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><div class="four" data-v-0af41bf3><span class="text" data-v-0af41bf3>foo</span> <div class="container" data-v-0af41bf3><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div> <span class="text" data-v-0af41bf3>bar</span></div> <blockquote><p>注意,设为网格布局以后,容器子元素(项目)的<code>float</code>、<code>display: inline-block</code>、<code>display: table-cell</code>、<code>vertical-align</code>和<code>column-*</code>等设置都将失效。</p></blockquote> <h3 id="_3-2-grid-template-属性"><a href="#_3-2-grid-template-属性" class="header-anchor">#</a> 3.2 grid-template-* 属性</h3> <p>grid-template-columns 属性,<br>
- grid-template-rows 属性</p> <p>容器指定了网格布局以后,接着就要划分行和列。<code>grid-template-columns</code>属性定义每一列的列宽,<code>grid-template-rows</code>属性定义每一行的行高。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><p>上面代码指定了一个三行三列的网格,列宽和行高都是<code>100px</code>。</p> <div data-v-43194dd2><div class="container one" data-v-43194dd2><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>除了使用绝对单位,也可以使用百分比。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 33.33% 33.33% 33.33%<span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> 33.33% 33.33% 33.33%<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><h4 id="(1)repeat"><a href="#(1)repeat" class="header-anchor">#</a> (1)repeat()</h4> <p>有时候,重复写同样的值非常麻烦,尤其网格很多时。这时,可以使用<code>repeat()</code>函数,简化重复的值。上面的代码用<code>repeat()</code>改写如下。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> <span class="token function">repeat</span><span class="token punctuation">(</span>3<span class="token punctuation">,</span> 33.33%<span class="token punctuation">)</span><span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> <span class="token function">repeat</span><span class="token punctuation">(</span>3<span class="token punctuation">,</span> 33.33%<span class="token punctuation">)</span><span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><p><code>repeat()</code>接受两个参数,第一个参数是重复的次数(上例是3),第二个参数是所要重复的值。</p> <p><code>repeat()</code>重复某种模式也是可以的。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-columns</span><span class="token punctuation">:</span> <span class="token function">repeat</span><span class="token punctuation">(</span>2<span class="token punctuation">,</span> 100px 20px 80px<span class="token punctuation">)</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>上面代码定义了6列,第一列和第四列的宽度为<code>100px</code>,第二列和第五列为<code>20px</code>,第三列和第六列为<code>80px</code>。</p> <div data-v-030cae2b><div class="container one" data-v-030cae2b><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(2)auto-fill-关键字"><a href="#(2)auto-fill-关键字" class="header-anchor">#</a> (2)auto-fill 关键字</h4> <p>有时,单元格的大小是固定的,但是容器的大小不确定。如果希望每一行(或每一列)容纳尽可能多的单元格,这时可以使用<code>auto-fill</code>关键字表示自动填充。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> <span class="token function">repeat</span><span class="token punctuation">(</span>auto-fill<span class="token punctuation">,</span> 100px<span class="token punctuation">)</span><span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码表示每列宽度<code>100px</code>,然后自动填充,直到容器不能放置更多的列。</p> <div data-v-492e803a><div class="container one" data-v-492e803a><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(3)fr-关键字"><a href="#(3)fr-关键字" class="header-anchor">#</a> (3)fr 关键字</h4> <p>为了方便表示比例关系,网格布局提供了<code>fr</code>关键字(fraction 的缩写,意为"片段")。如果两列的宽度分别为<code>1fr</code>和<code>2fr</code>,就表示后者是前者的两倍。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 1fr 1fr<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码表示两个相同宽度的列。</p> <div data-v-267142c2><div class="container one" data-v-267142c2><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>fr</code>可以与绝对长度的单位结合使用,这时会非常方便。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 150px 1fr 2fr<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码表示,第一列的宽度为150像素,第二列的宽度是第三列的一半。</p> <div data-v-9c32c068><div class="container one" data-v-9c32c068><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(4)minmax"><a href="#(4)minmax" class="header-anchor">#</a> (4)minmax()</h4> <p><code>minmax()</code>函数产生一个长度范围,表示长度就在这个范围之中。它接受两个参数,分别为最小值和最大值。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 1fr 1fr <span class="token function">minmax</span><span class="token punctuation">(</span>100px<span class="token punctuation">,</span> 1fr<span class="token punctuation">)</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>上面代码中,<code>minmax(100px, 1fr)</code>表示列宽不小于<code>100px</code>,不大于<code>1fr</code></p> <div data-v-546963f5><div class="container one" data-v-546963f5><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(5)auto-关键字"><a href="#(5)auto-关键字" class="header-anchor">#</a> (5)auto 关键字</h4> <p><code>auto</code>关键字表示由浏览器自己决定长度。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 100px auto 100px<span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>上面代码中,第二列的宽度,基本上等于该列单元格的最大宽度,除非单元格内容设置了<code>min-width</code>,且这个值大于最大宽度。</p> <div data-v-bff890b6><div class="container one" data-v-bff890b6><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(6)网格线的名称"><a href="#(6)网格线的名称" class="header-anchor">#</a> (6)网格线的名称</h4> <p><code>grid-template-columns</code>属性和<code>grid-template-rows</code>属性里面,还可以使用方括号,指定每一根网格线的名字,方便以后的引用。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> [c1] 100px [c2] 100px [c3] auto [c4]<span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> [r1] 100px [r2] 100px [r3] auto [r4]<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br></div></div><p>上面代码指定网格布局为3行 x 3列,因此有4根垂直网格线和4根水平网格线。方括号里面依次是这八根线的名字。</p> <p>网格布局允许同一根线有多个名字,比如[fifth-line row-5]。</p> <div data-v-092c0bd6><div class="container one" data-v-092c0bd6><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h4 id="(7)布局实例"><a href="#(7)布局实例" class="header-anchor">#</a> (7)布局实例</h4> <p><code>grid-template-columns</code>属性对于网页布局非常有用。两栏式布局只需要一行代码。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.wrapper</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 70% 30%<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码将左边栏设为70%,右边栏设为30%。</p> <div data-v-3db2b1c8><div class="container one" data-v-3db2b1c8><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>传统的十二网格布局,写起来也很容易。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-columns</span><span class="token punctuation">:</span> <span class="token function">repeat</span><span class="token punctuation">(</span>12<span class="token punctuation">,</span> 1fr<span class="token punctuation">)</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div data-v-3526bc5d><div class="container one" data-v-3526bc5d><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h3 id="_3-3-grid-gap"><a href="#_3-3-grid-gap" class="header-anchor">#</a> 3.3 grid-*-gap</h3> <p>grid-row-gap 属性<br>
- grid-column-gap 属性,<br>
- grid-gap 属性<br></p> <hr> <p><code>grid-row-gap</code>属性设置行与行的间隔(行间距),<code>grid-column-gap</code>属性设置列与列的间隔(列间距)。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">grid-row-gap</span><span class="token punctuation">:</span> 20px<span class="token punctuation">;</span>
- <span class="token property">grid-column-gap</span><span class="token punctuation">:</span> 20px<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码中,<code>grid-row-gap</code>用于设置行间距,<code>grid-column-gap</code>用于设置列间距</p> <div class="box" data-v-92d226ee><div class="container one" data-v-92d226ee><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>grid-gap</code>属性是<code>grid-column-gap</code>和<code>grid-row-gap</code>的合并简写形式,语法如下。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-gap</span><span class="token punctuation">:</span> <grid-row-gap> <grid-column-gap><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>因此,上面一段 CSS 代码等同于下面的代码。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">grid-gap</span><span class="token punctuation">:</span> 20px 20px<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>如果<code>grid-gap</code>省略了第二个值,浏览器认为第二个值等于第一个值。</p> <blockquote><p>根据最新标准,上面三个属性名的<code>grid-</code>前缀已经删除,<code>grid-column-gap</code>和<code>grid-row-gap</code>写成<code>column-gap</code>和<code>row-gap</code>,<code>grid-gap</code>写成<code>gap</code>。</p></blockquote> <h3 id="_3-4-grid-template-areas-属性"><a href="#_3-4-grid-template-areas-属性" class="header-anchor">#</a> 3.4 grid-template-areas 属性</h3> <p>网格布局允许指定"区域"(area),一个区域由单个或多个单元格组成。<code>grid-template-areas</code>属性用于定义区域。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token property">grid-template-areas</span><span class="token punctuation">:</span> <span class="token string">'a b c'</span>
- <span class="token string">'d e f'</span>
- <span class="token string">'g h i'</span><span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br></div></div><p>上面代码先划分出9个单元格,然后将其定名为<code>a</code>到<code>i</code>的九个区域,分别对应这九个单元格。</p> <p>多个单元格合并成一个区域的写法如下。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-areas</span><span class="token punctuation">:</span> <span class="token string">'a a a'</span>
- <span class="token string">'b b b'</span>
- <span class="token string">'c c c'</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码将9个单元格分成<code>a</code>、<code>b</code>、<code>c</code>三个区域。</p> <p>下面是一个布局实例。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-areas</span><span class="token punctuation">:</span> <span class="token string">"header header header"</span>
- <span class="token string">"main main sidebar"</span>
- <span class="token string">"footer footer footer"</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码中,顶部是页眉区域<code>header</code>,底部是页脚区域<code>footer</code>,中间部分则为<code>main</code>和<code>sidebar</code>。</p> <p>如果某些区域不需要利用,则使用"点"(<code>.</code>)表示。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-template-areas</span><span class="token punctuation">:</span> <span class="token string">'a . c'</span>
- <span class="token string">'d . f'</span>
- <span class="token string">'g . i'</span><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码中,中间一列为点,表示没有用到该单元格,或者该单元格不属于任何区域。</p> <blockquote><p>注意,区域的命名会影响到网格线。每个区域的起始网格线,会自动命名为<code>区域名-start</code>,终止网格线自动命名为<code>区域名-end</code>。<br><br>
- 比如,区域名为<code>header</code>,则起始位置的水平网格线和垂直网格线叫做<code>header-start</code>,终止位置的水平网格线和垂直网格线叫做<code>header-end</code>。</p></blockquote> <h3 id="_3-5-grid-auto-flow-属性"><a href="#_3-5-grid-auto-flow-属性" class="header-anchor">#</a> 3.5 grid-auto-flow 属性</h3> <p>划分网格以后,容器的子元素会按照顺序,自动放置在每一个网格。默认的放置顺序是"先行后列",即先填满第一行,再开始放入第二行,即下图数字的顺序。</p> <div data-v-43194dd2><div class="container one" data-v-43194dd2><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>这个顺序由<code>grid-auto-flow</code>属性决定,默认值是<code>row</code>,即"先行后列"。也可以将它设成<code>column</code>,变成"先列后行"。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-auto-flow</span><span class="token punctuation">:</span> column<span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>上面代码设置了column以后,放置顺序就变成了下图。</p> <div class="box" data-v-53d98e9a><div class="container one" data-v-53d98e9a><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>grid-auto-flow</code>属性除了设置成<code>row</code>和<code>column</code>,还可以设成<code>row dense</code>和<code>column dense</code>。这两个值主要用于,某些项目指定位置以后,剩下的项目怎么自动放置。</p> <p>下面的例子让1号项目和2号项目各占据两个单元格,然后在默认的<code>grid-auto-flow: row</code>情况下,会产生下面这样的布局。</p> <div class="box-16"><div class="container one-16"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>上图中,1号项目后面的位置是空的,这是因为3号项目默认跟着2号项目,所以会排在2号项目后面。</p> <p>现在修改设置,设为<code>row dense</code>,表示"先行后列",并且尽可能紧密填满,尽量不出现空格。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-auto-flow</span><span class="token punctuation">:</span> row dense<span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-17"><div class="container one-17"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>上图会先填满第一行,再填满第二行,所以3号项目就会紧跟在1号项目的后面。8号项目和9号项目就会排到第四行。</p> <p>如果将设置改为<code>column dense</code>,表示"先列后行",并且尽量填满空格。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">grid-auto-flow</span><span class="token punctuation">:</span> column dense<span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-18"><div class="container one-18"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>上图会先填满第一列,再填满第2列,所以3号项目在第一列,4号项目在第二列。8号项目和9号项目被挤到了第四列。</p> <h3 id="_3-6-justify-items-属性。。。"><a href="#_3-6-justify-items-属性。。。" class="header-anchor">#</a> 3.6 justify-items 属性。。。</h3> <p>justify-items 属性,<br>
- align-items 属性,<br>
- place-items 属性</p> <p><code>justify-items</code>属性设置单元格内容的水平位置(左中右),<code>align-items</code>属性设置单元格内容的垂直位置(上中下)。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">justify-items</span><span class="token punctuation">:</span> start | end | center | stretch<span class="token punctuation">;</span>
- <span class="token property">align-items</span><span class="token punctuation">:</span> start | end | center | stretch<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>这两个属性的写法完全相同,都可以取下面这些值。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>start:对齐单元格的起始边缘。
- end:对齐单元格的结束边缘。
- center:单元格内部居中。
- stretch:拉伸,占满单元格的整个宽度(默认值)。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">justify-items</span><span class="token punctuation">:</span> start<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码表示,单元格的内容左对齐,效果如下图。</p> <div class="box-19"><div class="container one-19"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">align-items</span><span class="token punctuation">:</span> start<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码表示,单元格的内容头部对齐,效果如下图。</p> <div class="box-20"><div class="container one-20"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>place-items</code>属性是<code>align-items</code>属性和<code>justify-items</code>属性的合并简写形式。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">place-items</span><span class="token punctuation">:</span> <align-items> <justify-items><span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>下面是一个例子。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token property">place-items</span><span class="token punctuation">:</span> start end<span class="token punctuation">;</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-21"><div class="container one-21"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>如果省略第二个值,则浏览器认为与第一个值相等。</p> <h3 id="_3-7-justify-content-属性,"><a href="#_3-7-justify-content-属性," class="header-anchor">#</a> 3.7 justify-content 属性,...</h3> <p><code>justify-content</code>属性是整个内容区域在容器里面的水平位置(左中右),<code>align-content</code>属性是整个内容区域的垂直位置(上中下)。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">justify-content</span><span class="token punctuation">:</span> start | end | center | stretch | space-around | space-between | space-evenly<span class="token punctuation">;</span>
- <span class="token property">align-content</span><span class="token punctuation">:</span> start | end | center | stretch | space-around | space-between | space-evenly<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>这两个属性的写法完全相同,都可以取下面这些值。(下面的图都以<code>justify-content</code>属性为例,<code>align-content</code>属性的图完全一样,只是将水平方向改成垂直方向。)</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>start - 对齐容器的起始边框。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-22"><div class="container one-22"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>end - 对齐容器的结束边框。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-23"><div class="container one-23"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>center - 容器内部居中。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-24"><div class="container one-24"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>stretch - 项目大小没有指定时,拉伸占据整个网格容器。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-25"><div class="container one-25"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>space-around - 每个项目两侧的间隔相等。所以,项目之间的间隔比项目与容器边框的间隔大一倍。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-26"><div class="container one-26"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>space-between - 项目与项目的间隔相等,项目与容器边框之间没有间隔。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-27"><div class="container one-27"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <div class="language- line-numbers-mode"><pre class="language-text"><code>space-evenly - 项目与项目的间隔相等,项目与容器边框之间也是同样长度的间隔。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-28"><div class="container one-28"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>place-content</code>属性是<code>align-content</code>属性和<code>justify-content</code>属性的合并简写形式。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>place-content: <align-content> <justify-content>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>下面是一个例子。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>place-content: space-around space-evenly;
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="box-29"><div class="container one-29"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>如果省略第二个值,浏览器就会假定第二个值等于第一个值。</p> <h3 id="_3-8-grid-auto"><a href="#_3-8-grid-auto" class="header-anchor">#</a> 3.8 grid-auto-...</h3> <p>grid-auto-columns 属性,<br>
- grid-auto-rows 属性</p> <p>有时候,一些项目的指定位置,在现有网格的外部。比如网格只有3列,但是某一个项目指定在第5行。这时,浏览器会自动生成多余的网格,以便放置项目。</p> <p><code>grid-auto-columns</code>属性和<code>grid-auto-rows</code>属性用来设置,浏览器自动创建的多余网格的列宽和行高。它们的写法与<code>grid-template-columns</code>和<code>grid-template-rows</code>完全相同。如果不指定这两个属性,浏览器完全根据单元格内容的大小,决定新增网格的列宽和行高。</p> <p>下面的例子里面,划分好的网格是3行 x 3列,但是,8号项目指定在第4行,9号项目指定在第5行。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code>
- <span class="token selector">.container</span> <span class="token punctuation">{</span>
- <span class="token property">display</span><span class="token punctuation">:</span> grid<span class="token punctuation">;</span>
- <span class="token property">grid-template-columns</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token property">grid-template-rows</span><span class="token punctuation">:</span> 100px 100px 100px<span class="token punctuation">;</span>
- <span class="token property">grid-auto-rows</span><span class="token punctuation">:</span> 50px<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br></div></div><div class="box-30"><div class="container one-30"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h3 id="_3-9-grid-template-属性,grid-属性"><a href="#_3-9-grid-template-属性,grid-属性" class="header-anchor">#</a> 3.9 grid-template 属性,grid 属性</h3> <p><code>grid-template</code>属性是<code>grid-template-columns</code>、<code>grid-template-rows</code>和<code>grid-template-areas</code>这三个属性的合并简写形式。</p> <p><code>grid</code>属性是<code>grid-template-rows</code>、<code>grid-template-columns</code>、<code>grid-template-areas</code>、 <code>grid-auto-rows</code>、<code>grid-auto-columns</code>、<code>grid-auto-flow</code>这六个属性的合并简写形式。</p> <p>从易读易写的角度考虑,还是建议不要合并属性,所以这里就不详细介绍这两个属性了。</p> <h2 id="四、项目属性"><a href="#四、项目属性" class="header-anchor">#</a> 四、项目属性</h2> <p>下面这些属性定义在项目上面。</p> <h3 id="_4-1-grid-column"><a href="#_4-1-grid-column" class="header-anchor">#</a> 4.1 grid-column...</h3> <p>grid-column-start 属性,<br>
- grid-column-end 属性,<br>
- grid-row-start 属性,<br>
- grid-row-end 属性</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>grid-column-start属性:左边框所在的垂直网格线
- grid-column-end属性:右边框所在的垂直网格线
- grid-row-start属性:上边框所在的水平网格线
- grid-row-end属性:下边框所在的水平网格线
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> 2<span class="token punctuation">;</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> 4<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><div class="box-31"><div class="container one-31"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>上图中,只指定了1号项目的左右边框,没有指定上下边框,所以会采用默认位置,即上边框是第一根水平网格线,下边框是第二根水平网格线。</p> <p>除了1号项目以外,其他项目都没有指定位置,由浏览器自动布局,这时它们的位置由容器的<code>grid-auto-flow</code>属性决定,这个属性的默认值是<code>row</code>,因此会"先行后列"进行排列。读者可以把这个属性的值分别改成<code>column</code>、<code>row dense</code>和<code>column dense</code>,看看其他项目的位置发生了怎样的变化。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> 3<span class="token punctuation">;</span>
- <span class="token property">grid-row-start</span><span class="token punctuation">:</span> 2<span class="token punctuation">;</span>
- <span class="token property">grid-row-end</span><span class="token punctuation">:</span> 4<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><div class="box-32"><div class="container one-32"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>这四个属性的值,除了指定为第几个网格线,还可以指定为网格线的名字。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> header-start<span class="token punctuation">;</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> header-end<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码中,左边框和右边框的位置,都指定为网格线的名字。</p> <p>这四个属性的值还可以使用<code>span</code>关键字,表示"跨越",即左右边框(上下边框)之间跨越多少个网格。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> span 2<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码表示,1号项目的左边框距离右边框跨越2个网格。</p> <div class="box-33"><div class="container one-33"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>这与下面的代码效果完全一样。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> span 2<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>使用这四个属性,如果产生了项目的重叠,则使用<code>z-index</code>属性指定项目的重叠顺序。</p> <h3 id="_4-2-grid-column-属性,grid-row-属性"><a href="#_4-2-grid-column-属性,grid-row-属性" class="header-anchor">#</a> 4.2 grid-column 属性,grid-row 属性</h3> <p><code>grid-column</code>属性是<code>grid-column-start</code>和<code>grid-column-end</code>的合并简写形式,<code>grid-row</code>属性是<code>grid-row-start</code>属性和<code>grid-row-end</code>的合并简写形式。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column</span><span class="token punctuation">:</span> / <span class="token punctuation">;</span>
- <span class="token property">grid-row</span><span class="token punctuation">:</span> / <span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>下面是一个例子。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column</span><span class="token punctuation">:</span> 1 / 3<span class="token punctuation">;</span>
- <span class="token property">grid-row</span><span class="token punctuation">:</span> 1 / 2<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- <span class="token comment">/* 等同于 */</span>
- <span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> 3<span class="token punctuation">;</span>
- <span class="token property">grid-row-start</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-row-end</span><span class="token punctuation">:</span> 2<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br></div></div><p>上面代码中,项目<code>item-1</code>占据第一行,从第一根列线到第三根列线。</p> <p>这两个属性之中,也可以使用<code>span</code>关键字,表示跨越多少个网格。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">background</span><span class="token punctuation">:</span> #b03532<span class="token punctuation">;</span>
- <span class="token property">grid-column</span><span class="token punctuation">:</span> 1 / 3<span class="token punctuation">;</span>
- <span class="token property">grid-row</span><span class="token punctuation">:</span> 1 / 3<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- <span class="token comment">/* 等同于 */</span>
- <span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">background</span><span class="token punctuation">:</span> #b03532<span class="token punctuation">;</span>
- <span class="token property">grid-column</span><span class="token punctuation">:</span> 1 / span 2<span class="token punctuation">;</span>
- <span class="token property">grid-row</span><span class="token punctuation">:</span> 1 / span 2<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br></div></div><p>上面代码中,项目item-1占据的区域,包括第一行 + 第二行、第一列 + 第二列。</p> <div class="box-34"><div class="container one-34"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p>斜杠以及后面的部分可以省略,默认跨越一个网格。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-column</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-row</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>上面代码中,项目<code>item-1</code>占据左上角第一个网格。</p> <h3 id="_4-3-grid-area-属性"><a href="#_4-3-grid-area-属性" class="header-anchor">#</a> 4.3 grid-area 属性</h3> <p><code>grid-area</code>属性指定项目放在哪一个区域。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-area</span><span class="token punctuation">:</span> e<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>上面代码中,1号项目位于<code>e</code>区域,效果如下图。</p> <div class="box-35"><div class="container one-35"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>grid-area</code>属性还可用作<code>grid-row-start</code>、<code>grid-column-start</code>、<code>grid-row-end</code>、<code>grid-column-end</code>的合并简写形式,直接指定项目的位置。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item</span> <span class="token punctuation">{</span>
- <span class="token property">grid-area</span><span class="token punctuation">:</span> <row-start> / <column-start> / <row-end> / <column-end><span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>下面是一个例子。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token comment">/* 这种写法有可能被预编译处理器认为需要进行计算,所以推荐分开写 */</span>
- <span class="token property">grid-area</span><span class="token punctuation">:</span> 1 / 1 / 3 / 3<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- <span class="token comment">/* 推荐 */</span>
- <span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">grid-row-start</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-column-start</span><span class="token punctuation">:</span> 1<span class="token punctuation">;</span>
- <span class="token property">grid-row-end</span><span class="token punctuation">:</span> 3<span class="token punctuation">;</span>
- <span class="token property">grid-column-end</span><span class="token punctuation">:</span> 3<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br></div></div><div class="box-36"><div class="container one-36"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <h3 id="_4-4-justify-self-属性"><a href="#_4-4-justify-self-属性" class="header-anchor">#</a> 4.4 justify-self 属性...</h3> <p>justify-self 属性,<br>
- align-self 属性,<br>
- place-self 属性</p> <p><code>justify-self</code>属性设置单元格内容的水平位置(左中右),跟<code>justify-items</code>属性的用法完全一致,但只作用于单个项目。</p> <p><code>align-self</code>属性设置单元格内容的垂直位置(上中下),跟<code>align-items</code>属性的用法完全一致,也是只作用于单个项目。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item</span> <span class="token punctuation">{</span>
- <span class="token property">justify-self</span><span class="token punctuation">:</span> start | end | center | stretch<span class="token punctuation">;</span>
- <span class="token property">align-self</span><span class="token punctuation">:</span> start | end | center | stretch<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>这两个属性都可以取下面四个值。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>start:对齐单元格的起始边缘。
- end:对齐单元格的结束边缘。
- center:单元格内部居中。
- stretch:拉伸,占满单元格的整个宽度(默认值)。
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br></div></div><p>下面是<code>justify-self: start</code>的例子。</p> <div class="language-css line-numbers-mode"><pre class="language-css"><code><span class="token selector">.item-1</span> <span class="token punctuation">{</span>
- <span class="token property">justify-self</span><span class="token punctuation">:</span> start<span class="token punctuation">;</span>
- <span class="token punctuation">}</span>
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><div class="box-37"><div class="container one-37"><div><p>1</p></div><div><p>2</p></div><div><p>3</p></div><div><p>4</p></div><div><p>5</p></div><div><p>6</p></div><div><p>7</p></div><div><p>8</p></div><div><p>9</p></div></div></div> <p><code>place-self</code>属性是<code>align-self</code>属性和<code>justify-self</code>属性的合并简写形式。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>place-self: <align-self> <justify-self>;
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>下面是一个例子。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>place-self: center center;
- </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>如果省略第二个值,place-self属性会认为这两个值相等。</p> <h2 id="五、参考链接"><a href="#五、参考链接" class="header-anchor">#</a> 五、参考链接</h2> <ul><li><a href="https://css-tricks.com/snippets/css/complete-guide-grid/" target="_blank" rel="noopener noreferrer">A Complete Guide to Grid<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>, by Chris House</li> <li><a href="https://webdesign.tutsplus.com/series/understanding-the-css-grid-layout-module--cms-1079" target="_blank" rel="noopener noreferrer">Understanding the CSS Grid Layout Module<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>, by Ian Yates</li> <li><a href="https://webdesign.tutsplus.com/tutorials/how-to-build-an-off-canvas-navigation-with-css-grid--cms-28191" target="_blank" rel="noopener noreferrer">How to Build an Off-Canvas Navigation With CSS Grid<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>, Ian Yates</li> <li><a href="https://code.tutsplus.com/tutorials/introduction-to-css-grid-layout-with-examples--cms-25392" target="_blank" rel="noopener noreferrer">Introduction to the CSS Grid Layout With Examples<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>, Dogacan Bilgili</li> <li><a href="http://learncssgrid.com/" target="_blank" rel="noopener noreferrer">Learn CSS Grid<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>, Jonathan Suh</li> <li><a href="https://blog.theodo.fr/2018/03/stop-using-bootstrap-layout-thanks-to-css-grid/" target="_blank" rel="noopener noreferrer">How I stopped using Bootstrap's layout thanks to CSS Grid<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>, Cédric Kui</li></ul> <p>(完)</p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">11/4/2019, 12:48:37 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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