freeCodeCamp/curriculum/challenges/chinese/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-t...

78 lines
3.3 KiB
Markdown
Raw Blame History

This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

---
id: 587d78a5367417b2b2512ad7
title: Use a CSS Linear Gradient to Create a Striped Element
challengeType: 0
videoUrl: ''
localeTitle: 使用CSS线性渐变来创建条带元素
---
## Description
<section id="description"> <code>repeating-linear-gradient()</code>函数与<code>linear-gradient()</code>非常相似,主要区别在于它重复指定的渐变图案。 <code>repeating-linear-gradient()</code>接受各种值但为简单起见您将在此挑战中使用角度值和颜色停止值。角度值是梯度的方向。颜色停止类似于标记转换发生位置的宽度值并且以百分比或像素数给出。在代码编辑器中演示的示例中渐变以0像素处的<code>yellow</code>开始在距离开始40像素处混合成第二种颜色<code>blue</code> 。由于下一个颜色停止也是40像素因此渐变立即变为第三颜色<code>green</code> ,其本身混合为第四颜色值<code>red</code> 因为距离渐变的开始是80像素。对于这个例子它有助于将颜色停止视为每两种颜色混合在一起的对。 <code>0px [yellow -- blend -- blue] 40px [green -- blend -- red] 80px</code>如果每两个颜色停止值是相同的颜色,则混合不明显,因为它在相同的颜色之间,然后是硬转换到下一个颜色,所以你最终得到条纹。 </section>
## Instructions
<section id="instructions">通过更改<code>repeating-linear-gradient()</code>以使用<code>45deg</code>度的渐变角度来<code>45deg</code> ,然后将前两个颜色停止设置为<code>yellow</code> ,最后将第二个两个颜色停止为<code>black</code></section>
## Tests
<section id='tests'>
```yml
tests:
- text: <code>repeating-linear-gradient()</code>应为45度。
testString: 'assert(code.match(/background:\s*?repeating-linear-gradient\(\s*?45deg/gi), "The angle of the <code>repeating-linear-gradient()</code> should be 45deg.");'
- text: <code>repeating-linear-gradient()</code>不应再为90度
testString: 'assert(!code.match(/90deg/gi), "The angle of the <code>repeating-linear-gradient()</code> should no longer be 90deg");'
- text: 0像素处的颜色停止应为<code>yellow</code> 。
testString: 'assert(code.match(/yellow\s+?0(px)?/gi), "The color stop at 0 pixels should be <code>yellow</code>.");'
- text: 40像素的一个颜色停止应为<code>yellow</code> 。
testString: 'assert(code.match(/yellow\s+?40px/gi), "One color stop at 40 pixels should be <code>yellow</code>.");'
- text: 40像素的第二个色标应为<code>black</code> 。
testString: 'assert(code.match(/yellow\s+?40px,\s*?black\s+?40px/gi), "The second color stop at 40 pixels should be <code>black</code>.");'
- text: 80像素的最后一个色标应为<code>black</code> 。
testString: 'assert(code.match(/black\s+?80px/gi), "The last color stop at 80 pixels should be <code>black</code>.");'
```
</section>
## Challenge Seed
<section id='challengeSeed'>
<div id='html-seed'>
```html
<style>
div{
border-radius: 20px;
width: 70%;
height: 400px;
margin: 50 auto;
background: repeating-linear-gradient(
90deg,
yellow 0px,
blue 40px,
green 40px,
red 80px
);
}
</style>
<div></div>
```
</div>
</section>
## Solution
<section id='solution'>
```js
// solution required
```
</section>