2018-10-10 22:03:03 +00:00
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---
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id: bad87fee1348bd9acdf08812
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2020-12-16 07:37:30 +00:00
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title: 调整图片的大小
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2018-10-10 22:03:03 +00:00
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challengeType: 0
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2019-12-13 05:47:57 +00:00
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videoUrl: 'https://scrimba.com/c/cM9MmCP'
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forumTopicId: 18282
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2018-10-10 22:03:03 +00:00
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---
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2020-12-16 07:37:30 +00:00
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# --description--
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2021-01-08 19:20:48 +00:00
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CSS 的 `width` 属性可以控制元素的宽度。和设置文本字号一样,我们会以 `px`(像素)为单位来设置图片的宽度。
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2020-12-16 07:37:30 +00:00
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2021-01-08 19:20:48 +00:00
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例如,如果你想创建一个叫 `larger-image` 的 CSS `class` 来控制 HTML 元素的宽度为 500px,就可以这样写:
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2019-12-13 05:47:57 +00:00
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```html
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<style>
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.larger-image {
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width: 500px;
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}
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</style>
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```
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2020-12-16 07:37:30 +00:00
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# --instructions--
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2018-10-10 22:03:03 +00:00
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2021-01-08 19:20:48 +00:00
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创建一个叫 `smaller-image` 的 CSS `class`,并用它来设置图片宽度为 100px。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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# --hints--
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2018-10-10 22:03:03 +00:00
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2021-01-08 19:20:48 +00:00
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`img` 元素的 `class` 应包含 `smaller-image`。
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2018-10-10 22:03:03 +00:00
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2020-12-16 07:37:30 +00:00
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```js
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assert(
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$("img[src='https://bit.ly/fcc-relaxing-cat']").attr('class') ===
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'smaller-image'
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);
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2018-10-10 22:03:03 +00:00
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```
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2021-01-08 19:20:48 +00:00
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图片宽度应为 100px。
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2018-10-10 22:03:03 +00:00
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```js
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2020-12-16 07:37:30 +00:00
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assert($('img').width() === 100);
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2018-10-10 22:03:03 +00:00
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```
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2020-08-13 15:24:35 +00:00
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2020-12-16 07:37:30 +00:00
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# --solutions--
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