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freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.md

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---
id: 587d7791367417b2b2512ab4
title: 使用 width 属性调整元素的宽度
challengeType: 0
videoUrl: 'https://scrimba.com/c/cvVLPtN'
forumTopicId: 301039
---
# --description--
你可以使用 CSS 里的 `width` 属性来指定元素的宽度。属性值可以是相对单位(比如 em、绝对单位比如 px、或者其父元素宽度的百分比。下面这段代码可以把图片的宽度设置为 220px
```css
img {
width: 220px;
}
```
# --instructions--
请使用 `fullCard` class 来选择卡片元素,为它添加 `width` 属性,并将它的宽度设置为 245px。
# --hints--
应使用 `fullCard` class 选择器将卡片的 `width` 属性值设置为 `245px`
```js
const fullCard = code.match(/\.fullCard\s*{[\s\S]+?[^}]}/g);
assert(
fullCard &&
/width\s*:\s*245px\s*(;|})/gi.test(fullCard[0]) &&
$('.fullCard').css('maxWidth') === 'none'
);
```
# --solutions--