Oliver Eyton-Williams ee1e8abd87
feat(curriculum): restore seed + solution to Chinese (#40683)
* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
2021-01-12 19:31:00 -07:00

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---
id: 587d78a6367417b2b2512add
title: 使用 CSS 创建一个图形
challengeType: 0
videoUrl: 'https://scrimba.com/c/cEDWPs6'
forumTopicId: 301048
dashedName: create-a-graphic-using-css
---
# --description--
术语表blur-radius => 模糊半径spread-radius => 辐射半径transparent => 透明的border-radius => 圆角边框。
通过使用不同的选择器和属性,你可以做出有趣的形状,比如新月形状。在这个挑战中,我们会学习如何使用 `box-shadow` 属性来设置元素的阴影,以及使用 `border-radius` 属性控制元素的圆角边框。
首先我们来创建一个圆的、透明的图形,它具有模糊阴影并略微向两边递减。如你所见,这个阴影其实就是新月形狀。
为了创建一个圆形的对象,`border-radius` 应该被设置成 50%。
你应该还记得之前关卡的 `box-shadow` 属性以及它的依次取值 `offset-x``offset-y``blur-radius``spread-radius` 和颜色值。其中 `blur-radius``spread-radius` 是可选的。
# --instructions--
把编辑器里的正方形元素变成新月形状。首先,把 `background-color` 改为 transparent接着把 `border-radius` 属性值设置成 50%,以创建一个圆形。最后,更改 `box-shadow` 属性,使其 `offset-x` 为 25px、`offset-y` 为 10px、`blur-radius` 为 0、`spread-radius` 为 0、`color` 为 blue。
# --hints--
`background-color` 属性值应为 `transparent`
```js
assert(code.match(/background-color:\s*?transparent;/gi));
```
`border-radius` 属性值应为 `50%`
```js
assert(code.match(/border-radius:\s*?50%;/gi));
```
`box-shadow``offset-x``offset-y``blur-radius``spread-radius``color` 属性值应依次为 `25px``10px``0``0``blue`
```js
assert(
code.match(/box-shadow:\s*?25px\s+?10px\s+?0(px)?\s+?0(px)?\s+?blue\s*?;/gi)
);
```
# --seed--
## --seed-contents--
```html
<style>
.center {
position: absolute;
margin: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100px;
height: 100px;
background-color: blue;
border-radius: 0px;
box-shadow: 25px 10px 10px 10px green;
}
</style>
<div class="center"></div>
```
# --solutions--
```html
<style>
.center {
position: absolute;
margin: auto;
top: 0;
right: 0;
bottom: 0;
left: 0;
width: 100px;
height: 100px;
background-color: transparent;
border-radius: 50%;
box-shadow: 25px 10px 0 0 blue;
}
</style>
<div class="center"></div>
```