101 lines
1.9 KiB
Markdown
101 lines
1.9 KiB
Markdown
|
---
|
||
|
|
id: 587d78a3367417b2b2512ace
|
||
|
|
title: 使用 float 屬性將元素左浮動或右浮動
|
||
|
|
challengeType: 0
|
||
|
|
videoUrl: 'https://scrimba.com/c/c2MDqu2'
|
||
|
|
forumTopicId: 301066
|
||
|
|
dashedName: push-elements-left-or-right-with-the-float-property
|
||
|
|
---
|
||
|
|
|
||
|
|
# --description--
|
||
|
|
|
||
|
|
接下來要介紹的定位機制並不是 `position` 屬性的選項，而是通過元素的 `float` 屬性來設置。 浮動元素不在文檔流中，它向 `left` 或 `right` 浮動，直到它的外邊緣碰到包含框或另一個浮動框的邊框爲止。 通常需要用 `width` 屬性來指定浮動元素佔據的水平空間。
|
||
|
|
|
||
|
|
# --instructions--
|
||
|
|
|
||
|
|
使這兩個元素按兩列布局，`section` 和 `aside` 左右排列。 設置 `#left` 元素的 `float` 屬性值爲 `left`，設置 `#right` 元素的 `float` 屬性值爲 `right`。
|
||
|
|
|
||
|
|
# --hints--
|
||
|
|
|
||
|
|
id 爲 `left` 的元素的 `float` 屬性值應爲 `left`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert($('#left').css('float') == 'left');
|
||
|
|
```
|
||
|
|
|
||
|
|
id 爲 `right` 的元素的 `float` 屬性值應爲 `right`。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert($('#right').css('float') == 'right');
|
||
|
|
```
|
||
|
|
|
||
|
|
# --seed--
|
||
|
|
|
||
|
|
## --seed-contents--
|
||
|
|
|
||
|
|
```html
|
||
|
|
<head>
|
||
|
|
<style>
|
||
|
|
#left {
|
||
|
|
|
||
|
|
width: 50%;
|
||
|
|
}
|
||
|
|
#right {
|
||
|
|
|
||
|
|
width: 40%;
|
||
|
|
}
|
||
|
|
aside, section {
|
||
|
|
padding: 2px;
|
||
|
|
background-color: #ccc;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<header>
|
||
|
|
<h1>Welcome!</h1>
|
||
|
|
</header>
|
||
|
|
<section id="left">
|
||
|
|
<h2>Content</h2>
|
||
|
|
<p>Good stuff</p>
|
||
|
|
</section>
|
||
|
|
<aside id="right">
|
||
|
|
<h2>Sidebar</h2>
|
||
|
|
<p>Links</p>
|
||
|
|
</aside>
|
||
|
|
</body>
|
||
|
|
```
|
||
|
|
|
||
|
|
# --solutions--
|
||
|
|
|
||
|
|
```html
|
||
|
|
<head>
|
||
|
|
<style>
|
||
|
|
#left {
|
||
|
|
float: left;
|
||
|
|
width: 50%;
|
||
|
|
}
|
||
|
|
#right {
|
||
|
|
float: right;
|
||
|
|
width: 40%;
|
||
|
|
}
|
||
|
|
aside, section {
|
||
|
|
padding: 2px;
|
||
|
|
background-color: #ccc;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<header>
|
||
|
|
<h1>Welcome!</h1>
|
||
|
|
</header>
|
||
|
|
<section id="left">
|
||
|
|
<h2>Content</h2>
|
||
|
|
<p>Good stuff</p>
|
||
|
|
</section>
|
||
|
|
<aside id="right">
|
||
|
|
<h2>Sidebar</h2>
|
||
|
|
<p>Links</p>
|
||
|
|
</aside>
|
||
|
|
</body>
|
||
|
|
```
|