ee1e8abd87
* 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>
93 lines
2.0 KiB
Markdown
93 lines
2.0 KiB
Markdown
---
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id: bad87fee1348bd9aedf04756
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title: Class 选择器的优先级高于继承样式
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challengeType: 0
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videoUrl: 'https://scrimba.com/c/cGJDQug'
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forumTopicId: 18253
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dashedName: override-styles-in-subsequent-css
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---
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# --description--
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"pink-text" class 覆盖了 `body` 元素的 CSS 声明。
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我们刚刚证明了我们的 class 会覆盖 `body` 的 CSS 样式。那么下一个问题是，我们要怎么样才能覆盖我们的 `pink-text` class 中所定义的样式？
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# --instructions--
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创建一个字体颜色为 `blue` 的 `blue-text` class，并确保它在 `pink-text` 下方声明。
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在含有 `pink-text` class 的 `h1` 元素里面，添加上 `blue-text` class。我们来看看到底是谁获胜。
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HTML 同时应用多个 class 属性需以空格来间隔，例子如下:
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`class="class1 class2"`
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**注意：**HTML 元素里应用的 class 的先后顺序无关紧要。
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但是，在 `<style>` 标签里面声明的 `class` 顺序十分重要，之后的声明会覆盖之前的声明。由于 `.blue-text` 在 `.pink-text` 的后面出现，所以 `.blue-text` 里的样式会覆盖 `.pink-text` 里的样式。
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# --hints--
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`h1` 元素应包含 `pink-text` class。
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```js
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assert($('h1').hasClass('pink-text'));
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```
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`h1` 元素应包含 `blue-text` class。
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```js
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assert($('h1').hasClass('blue-text'));
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```
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`blue-text` 和 `pink-text` 需同时应用于 `h1` 元素上。
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```js
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assert($('.pink-text').hasClass('blue-text'));
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```
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`h1` 元素的颜色应为蓝色。
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```js
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assert($('h1').css('color') === 'rgb(0, 0, 255)');
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```
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# --seed--
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## --seed-contents--
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```html
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<style>
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body {
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background-color: black;
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font-family: monospace;
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color: green;
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}
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.pink-text {
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color: pink;
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}
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</style>
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<h1 class="pink-text">Hello World!</h1>
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```
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# --solutions--
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```html
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<style>
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body {
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background-color: black;
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font-family: monospace;
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color: green;
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}
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.pink-text {
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color: pink;
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}
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.blue-text {
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color: blue;
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}
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</style>
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<h1 class="pink-text blue-text">Hello World!</h1>
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```
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