.has-before::before, .has-after::after { content: ""; position: absolute; }
时间: 2024-04-09 13:28:33 浏览: 71
这段CSS代码应用于`.has-before`和`.has-after`类选择器,并设置了它们的伪元素`::before`和`::after`的样式规则。让我们逐行解释它的含义:
```css
.has-before::before,
.has-after::after {
content: "";
position: absolute;
}
```
1. `.has-before::before`:选择器指定了具有`.has-before`类的元素的伪元素`::before`的样式规则。
2. `.has-after::after`:选择器指定了具有`.has-after`类的元素的伪元素`::after`的样式规则。
3. `content: "";`:设置伪元素的内容为空字符串。伪元素需要一个内容值,即使它是空的。这样做是为了激活伪元素并使其可见。
4. `position: absolute;`:将伪元素的定位类型设置为绝对定位。绝对定位允许通过指定位置属性来精确地控制伪元素在其父元素中的位置。
这段代码的目的是为具有`.has-before`和`.has-after`类的元素添加一个空的绝对定位的伪元素,但并没有指定伪元素的具体样式。通常,开发人员会在这些规则后面添加其他样式规则,以定义伪元素的外观和位置。
请注意,这些样式规则可能需要在合适的上下文中使用,并且可能会受到其他样式规则和浏览器的默认样式影响。
相关问题
Cannot resolve jakarta.servlet:jakarta.servlet-api:4.0.1
As an AI language model, I don't have access to your specific project or environment. However, here are a few general steps you can try to resolve the issue:
1. Check your repository: Make sure that the repository you are using to resolve the dependency is up-to-date and has the latest version of jakarta.servlet:jakarta.servlet-api:4.0.1.
2. Check your build file: If you are using a build tool like Maven or Gradle, make sure that you have added the correct dependency to your build file. Double-check the spelling and version number.
3. Check your environment: Make sure that your environment has the correct settings configured to resolve dependencies. For example, if you are using a proxy server, make sure that it is configured correctly.
4. Check your network: If you are behind a firewall or have restricted network access, make sure that you have the correct permissions to access the repository.
5. Try a different repository: If all else fails, try using a different repository to resolve the dependency. This may require updating your build file to point to the new repository.
Failed to execute goal on project mohrss-module-admin: Could not resolve dependencies for project com.jiayingframework.boot:mohrss-module-admin:jar:1.0.0: The following artifacts could not be resolved: com.jiayingframework.boot:mohrss-module-api:jar:1.0.0, com.jiayingframework.boot:mohrss-quartz:jar:1.0.0, com.jiayingframework.boot:mohrss-online:jar:1.0.0: Failure to find com.jiayingframework.boot:mohrss-module-api:jar:1.0.0 in http://maven.aliyun.com/nexus/content/groups/public/ was cached in the local repository, resolution will not be reattempted until the update interval of nexus-aliyun has elapsed or updates are forced -> [Help 1]
这个错误提示是由于 Maven 无法解析项目的依赖关系导致的。具体来说,Maven 找不到以下三个依赖项:
- com.jiayingframework.boot:mohrss-module-api:jar:1.0.0
- com.jiayingframework.boot:mohrss-quartz:jar:1.0.0
- com.jiayingframework.boot:mohrss-online:jar:1.0.0
这可能是因为这些依赖项没有正确地发布到您正在使用的 Maven 仓库中。根据错误消息,您正在使用的是阿里云的 Maven 仓库。
解决这个问题的一种方法是确保这些依赖项已经正确地发布到阿里云的 Maven 仓库中。您可以尝试在 Maven 的配置文件(settings.xml)中添加阿里云的仓库镜像,并运行 Maven 的更新命令来更新本地仓库。示例如下:
```xml
<mirrors>
<mirror>
<id>aliyun</id>
<name>Aliyun Mirror</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
</mirrors>
```
请注意,您还可以检查这些依赖项在仓库中是否存在,以确保它们被正确发布。另外,您还可以尝试使用其他 Maven 仓库来解决依赖项解析问题。
希望这些信息对您有所帮助!如果您有任何其他问题,请随时提问。
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