107 lines
2.4 KiB
Markdown
107 lines
2.4 KiB
Markdown
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---
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id: 587d78ae367417b2b2512afe
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title: 使用 flex 短方法屬性
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pVaDAv/cbpW2tE'
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forumTopicId: 301112
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dashedName: use-the-flex-shorthand-property
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---
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# --description--
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上面幾個 flex 屬性有一個簡寫方式。 `flex-grow`、`flex-shrink` 和 `flex-basis` 屬性可以在 `flex` 中一併設置。
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例如，`flex: 1 0 10px;` 會把項目屬性設爲 `flex-grow: 1;`、`flex-shrink: 0;` 以及 `flex-basis: 10px;`。
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屬性的默認設置是 `flex: 0 1 auto;`。
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# --instructions--
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請給 `#box-1` 和 `#box-2` 添加 `flex` 屬性。 設置 `#box-1` 的 `flex-grow` 屬性值爲 `2`、`flex-shrink` 屬性值爲 `2`、`flex-basis` 屬性值爲 `150px`。 設置 `#box-2` 的 `flex-grow` 屬性值爲 `1`、`flex-shrink` 屬性值爲 `1`、`flex-basis` 屬性值爲 `150px`。
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通過上面的設置，在容器大於 300px 時，`#box-1` 擴大的空間會是 `#box-2` 擴大空間的兩倍；在容器小於 300px 時，前者縮小的空間會是 `#box-2` 縮小空間的兩倍。 300px 是兩個盒子的 `flex-basis` 屬性值之和。
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# --hints--
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`#box-1` 元素應具有 `flex` 屬性，其屬性值應爲 `2 2 150px`。
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```js
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assert(
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$('#box-1').css('flex-grow') == '2' &&
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$('#box-1').css('flex-shrink') == '2' &&
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$('#box-1').css('flex-basis') == '150px'
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);
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```
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`#box-2` 元素應具有 `flex` 屬性，其屬性值應爲 `1 1 150px`。
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```js
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assert(
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$('#box-2').css('flex-grow') == '1' &&
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$('#box-2').css('flex-shrink') == '1' &&
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$('#box-2').css('flex-basis') == '150px'
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);
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```
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應使用 `flex` 的簡寫屬性爲 `#box-1` 和 `#box-2` 添加規則。
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```js
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assert(code.match(/flex:\s*?\d\s+?\d\s+?150px;/g).length == 2);
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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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height: 200px;
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}
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#box-2 {
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background-color: orangered;
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height: 200px;
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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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}
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#box-1 {
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background-color: dodgerblue;
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flex: 2 2 150px;
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height: 200px;
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}
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#box-2 {
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background-color: orangered;
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flex: 1 1 150px;
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height: 200px;
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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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