223 lines
4.7 KiB
Markdown
223 lines
4.7 KiB
Markdown
---
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id: 587d78ad367417b2b2512af9
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title: 在推文中使用 align-items 属性
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pVaDAv/cd3PNfq'
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forumTopicId: 301106
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dashedName: use-the-align-items-property-in-the-tweet-embed
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---
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# --description--
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在上一个挑战中,我们介绍了 `align-items` 属性并给出了示例。 我们可以对推文的几个嵌入元素使用这个属性,以调整其中 flex 元素的对齐方式。
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# --instructions--
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为 header 中的 `.follow-btn` 元素添加 CSS 属性 `align-items`, 并将其属性值设为 `center`。
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# --hints--
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`.follow-btn` 应在页面上呈现。 请关闭广告拦截器等任何扩展。
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```js
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assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
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```
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`.follow-btn` 元素应有值为 `center` 的 `align-items` 属性。
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```js
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assert($('.follow-btn').css('align-items') == 'center');
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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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body {
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font-family: Arial, sans-serif;
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}
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header, footer {
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display: flex;
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flex-direction: row;
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}
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header .profile-thumbnail {
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width: 50px;
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height: 50px;
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border-radius: 4px;
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}
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header .profile-name {
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display: flex;
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flex-direction: column;
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justify-content: center;
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margin-left: 10px;
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}
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header .follow-btn {
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display: flex;
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margin: 0 0 0 auto;
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}
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header .follow-btn button {
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border: 0;
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border-radius: 3px;
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padding: 5px;
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}
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header h3, header h4 {
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display: flex;
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margin: 0;
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}
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#inner p {
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margin-bottom: 10px;
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font-size: 20px;
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}
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#inner hr {
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margin: 20px 0;
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border-style: solid;
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opacity: 0.1;
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}
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footer .stats {
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display: flex;
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font-size: 15px;
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}
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footer .stats strong {
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font-size: 18px;
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}
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footer .stats .likes {
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margin-left: 10px;
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}
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footer .cta {
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margin-left: auto;
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}
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footer .cta button {
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border: 0;
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background: transparent;
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}
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</style>
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<header>
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<img src="https://freecodecamp.s3.amazonaws.com/quincy-twitter-photo.jpg" alt="Quincy Larson's profile picture" class="profile-thumbnail">
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<div class="profile-name">
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<h3>Quincy Larson</h3>
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<h4>@ossia</h4>
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</div>
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<div class="follow-btn">
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<button>Follow</button>
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</div>
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</header>
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<div id="inner">
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<p>I meet so many people who are in search of that one trick that will help them work smart. Even if you work smart, you still have to work hard.</p>
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<span class="date">1:32 PM - 12 Jan 2018</span>
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<hr>
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</div>
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<footer>
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<div class="stats">
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<div class="Retweets">
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<strong>107</strong> Retweets
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</div>
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<div class="likes">
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<strong>431</strong> Likes
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</div>
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</div>
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<div class="cta">
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<button class="share-btn">Share</button>
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<button class="retweet-btn">Retweet</button>
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<button class="like-btn">Like</button>
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</div>
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</footer>
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```
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# --solutions--
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```html
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<style>
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body {
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font-family: Arial, sans-serif;
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}
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header, footer {
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display: flex;
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flex-direction: row;
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}
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header .profile-thumbnail {
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width: 50px;
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height: 50px;
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border-radius: 4px;
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}
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header .profile-name {
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display: flex;
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flex-direction: column;
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justify-content: center;
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margin-left: 10px;
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}
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header .follow-btn {
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display: flex;
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align-items: center;
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margin: 0 0 0 auto;
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}
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header .follow-btn button {
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border: 0;
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border-radius: 3px;
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padding: 5px;
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}
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header h3, header h4 {
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display: flex;
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margin: 0;
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}
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#inner p {
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margin-bottom: 10px;
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font-size: 20px;
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}
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#inner hr {
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margin: 20px 0;
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border-style: solid;
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opacity: 0.1;
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}
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footer .stats {
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display: flex;
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font-size: 15px;
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}
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footer .stats strong {
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font-size: 18px;
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}
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footer .stats .likes {
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margin-left: 10px;
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}
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footer .cta {
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margin-left: auto;
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}
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footer .cta button {
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border: 0;
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background: transparent;
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}
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</style>
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<header>
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<img src="https://freecodecamp.s3.amazonaws.com/quincy-twitter-photo.jpg" alt="Quincy Larson's profile picture" class="profile-thumbnail">
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<div class="profile-name">
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<h3>Quincy Larson</h3>
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<h4>@ossia</h4>
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</div>
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<div class="follow-btn">
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<button>Follow</button>
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</div>
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</header>
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<div id="inner">
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<p>I meet so many people who are in search of that one trick that will help them work smart. Even if you work smart, you still have to work hard.</p>
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<span class="date">1:32 PM - 12 Jan 2018</span>
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<hr>
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</div>
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<footer>
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<div class="stats">
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<div class="Retweets">
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<strong>107</strong> Retweets
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</div>
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<div class="likes">
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<strong>431</strong> Likes
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</div>
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</div>
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<div class="cta">
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<button class="share-btn">Share</button>
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<button class="retweet-btn">Retweet</button>
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<button class="like-btn">Like</button>
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</div>
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</footer>
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```
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