104 lines
4.3 KiB
Markdown
104 lines
4.3 KiB
Markdown
---
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id: 5a90372638fddaf9a66b5d38
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title: Use grid-column to Control Spacing
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pByETK/cnzkDSr'
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forumTopicId: 301136
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localeTitle: 使用 grid-column 来控制空间大小
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---
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## Description
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<section id='description'>
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到目前为止，所有的讨论都是围绕网格容器的。<code>grid-column</code>属性是第一个用于网格项本身的属性。
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网格的假想水平线和垂直线被称为<dfn>线（lines）</dfn>。这些线在网格的左上角从 1 开始编号，垂直线向右、水平线向下累加计数。
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这是一个 3x3 网格的线条：
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<div style="position:relative;margin:auto;background:Gainsboro;display:block;margin-top:100px;margin-bottom:50px;width:200px;height:200px;"><p style="left:25%;top:-30%;font-size:130%;position:absolute;color:RoyalBlue;">column lines</p><p style="left:0%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;">1</p><p style="left:30%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;">2</p><p style="left:63%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;">3</p><p style="left:95%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;">4</p><p style="left:-40%;top:45%;font-size:130%;transform:rotateZ(-90deg);position:absolute;">row lines</p><p style="left:-10%;top:-10%;font-size:130%;position:absolute;">1</p><p style="left:-10%;top:21%;font-size:130%;position:absolute;">2</p><p style="left:-10%;top:53%;font-size:130%;position:absolute;">3</p><p style="left:-10%;top:85%;font-size:130%;position:absolute;">4</p><div style="left:0%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;"></div><div style="left:31%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;"></div><div style="left:63%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;"></div><div style="left:95%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;"></div><div style="left:0%;top:0%;width:100%;height:5%;background:black;position:absolute;"></div><div style="left:0%;top:31%;width:100%;height:5%;background:black;position:absolute;"></div><div style="left:0%;top:63%;width:100%;height:5%;background:black;position:absolute;"></div><div style="left:0%;top:95%;width:100%;height:5%;background:black;position:absolute;"></div></div>
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你可以用<code>grid-column</code>属性定义网格项开始和结束的位置，进而控制每个网格项占用的列数。
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示例如下：
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```css
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grid-column: 1 / 3;
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```
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这会让网格项从左侧第一条线开始到第三条线结束，占用两列。
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</section>
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## Instructions
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<section id='instructions'>
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使类为<code>item5</code>的网格项占用网格的最后两列。
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: '<code>item5</code>类应该有<code>grid-column</code>属性且其值为<code>2 / 4</code>。'
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testString: 'assert(code.match(/.item5\s*?{[\s\S]*grid-column\s*?:\s*?2\s*?\/\s*?4\s*?;[\s\S]*}/gi));'
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- text: '<code>item5</code> 类应该有 <code>grid-column</code> 属性使其占用网格最后两列。'
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testString: "
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const colStart = getComputedStyle($('.item5')[0]).gridColumnStart;
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const colEnd = getComputedStyle($('.item5')[0]).gridColumnEnd;
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const result = colStart.toString() + colEnd.toString();
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const correctResults = ['24', '2-1', '2span 2', '2span2', 'span 2-1', '-12', 'span 2span 2', 'span 2auto', 'autospan 2'];
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assert(correctResults.includes(result));
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"
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='html-seed'>
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```html
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<style>
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.item1{background:LightSkyBlue;}
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.item2{background:LightSalmon;}
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.item3{background:PaleTurquoise;}
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.item4{background:LightPink;}
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.item5 {
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background: PaleGreen;
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/* 请在本行以下添加你的代码 */
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/* 请在本行以上添加你的代码 */
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}
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.container {
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font-size: 40px;
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min-height: 300px;
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width: 100%;
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background: LightGray;
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display: grid;
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grid-template-columns: 1fr 1fr 1fr;
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grid-template-rows: 1fr 1fr 1fr;
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grid-gap: 10px;
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}
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</style>
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<div class="container">
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<div class="item1">1</div>
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<div class="item2">2</div>
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<div class="item3">3</div>
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<div class="item4">4</div>
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<div class="item5">5</div>
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</div>
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```html
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// solution required
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```
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</section>
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