87 lines
1.8 KiB
Markdown
87 lines
1.8 KiB
Markdown
---
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id: 587d78ab367417b2b2512af2
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title: 使用 flex-direction 属性创建一个行
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pVaDAv/cBEkbfJ'
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forumTopicId: 301110
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dashedName: use-the-flex-direction-property-to-make-a-row
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---
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# --description--
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给元素添加 `display: flex` 属性可以让它变成 flex 容器, 然后可以让元素的项目排列成行或列。 只要给父元素添加 `flex-direction` 属性,并把属性值设置为 row 或 column,即可横向排列或纵向排列它的所有子元素。 创建一行将使子项水平对齐,创建一列将使子项垂直对齐。
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`flex-direction` 的其他可选值还有 `row-reverse` 和 `column-reverse`。
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**注意:** `flex-direction` 的默认值为 `row`。
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# --instructions--
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请为 `#box-container` 添加 CSS 属性 `flex-direction`,将其值设为 `row-reverse`。
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# --hints--
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`#box-container` 元素应有 `flex-direction` 属性,其属性值应为 `row-reverse`。
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```js
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assert($('#box-container').css('flex-direction') == 'row-reverse');
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```
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# --seed--
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## --seed-contents--
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```html
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<style>
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#box-container {
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display: flex;
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height: 500px;
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}
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#box-1 {
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background-color: dodgerblue;
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width: 50%;
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height: 50%;
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}
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#box-2 {
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background-color: orangered;
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width: 50%;
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height: 50%;
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}
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</style>
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<div id="box-container">
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<div id="box-1"></div>
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<div id="box-2"></div>
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</div>
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```
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# --solutions--
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```html
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<style>
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#box-container {
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display: flex;
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height: 500px;
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flex-direction: row-reverse;
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}
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#box-1 {
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background-color: dodgerblue;
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width: 50%;
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height: 50%;
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}
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#box-2 {
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background-color: orangered;
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width: 50%;
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height: 50%;
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}
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</style>
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<div id="box-container">
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<div id="box-1"></div>
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<div id="box-2"></div>
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</div>
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```
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