142 lines
2.9 KiB
Markdown
142 lines
2.9 KiB
Markdown
---
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id: bad87fee1348bd9aedf08826
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title: 使用順時針標記指定元素的內邊距
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cB7mBS9'
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forumTopicId: 18346
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dashedName: use-clockwise-notation-to-specify-the-padding-of-an-element
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---
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# --description--
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如果不想每次都要分別聲明 `padding-top`、`padding-right`、`padding-bottom`、`padding-left` 屬性，可以把它們彙總在一行裏面一併聲明，像是這樣：
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```css
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padding: 10px 20px 10px 20px;
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```
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這四個值按順時針排序：上、右、下、左，並且設置的效果等同於分別聲明每一個方向的內邊距。
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# --instructions--
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按照順時針順序，把 `.blue-box` class 的上內邊距以及左內邊距 `padding` 設置爲 `40px`，右內邊距和下內邊距則設置爲`20px`。
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# --hints--
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class 爲 `blue-box` 的元素的上內邊距 `padding` 應爲 `40px`。
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```js
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assert($('.blue-box').css('padding-top') === '40px');
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```
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class 爲 `blue-box` 的元素的右內邊距 `padding` 應爲 `20px`。
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```js
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assert($('.blue-box').css('padding-right') === '20px');
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```
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class 爲 `blue-box` 的元素的下內邊距 `padding` 應爲 `20px`。
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```js
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assert($('.blue-box').css('padding-bottom') === '20px');
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```
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class 爲 `blue-box` 的元素的左內邊距 `padding` 應爲 `40px`。
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```js
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assert($('.blue-box').css('padding-left') === '40px');
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```
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應該按照順時針排序，彙總聲明的方式來設置 `blue-box` 的內邊距。
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```js
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assert(
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/\.blue-box\s*{[\s\S]*padding[\s]*:\s*\d+px\s+\d+px\s+\d+px\s+\d+px(;\s*[^}]+\s*}|;?\s*})/.test(
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__helpers.removeCssComments($('style').text())
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)
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);
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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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.injected-text {
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margin-bottom: -25px;
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text-align: center;
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}
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.box {
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border-style: solid;
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border-color: black;
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border-width: 5px;
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text-align: center;
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}
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.yellow-box {
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background-color: yellow;
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padding: 20px 40px 20px 40px;
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}
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.red-box {
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background-color: crimson;
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color: #fff;
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padding: 20px 40px 20px 40px;
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}
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.blue-box {
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background-color: blue;
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color: #fff;
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}
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</style>
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<h5 class="injected-text">margin</h5>
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<div class="box yellow-box">
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<h5 class="box red-box">padding</h5>
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<h5 class="box blue-box">padding</h5>
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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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.injected-text {
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margin-bottom: -25px;
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text-align: center;
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}
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.box {
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border-style: solid;
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border-color: black;
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border-width: 5px;
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text-align: center;
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}
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.yellow-box {
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background-color: yellow;
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padding: 20px 40px 20px 40px;
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}
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.red-box {
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background-color: crimson;
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color: #fff;
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padding: 20px 40px 20px 40px;
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}
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.blue-box {
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background-color: blue;
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color: #fff;
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padding: 40px 20px 20px 40px;
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}
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</style>
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<h5 class="injected-text">margin</h5>
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<div class="box yellow-box">
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<h5 class="box red-box">padding</h5>
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<h5 class="box blue-box">padding</h5>
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</div>
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```
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