js如何覆盖组件css样式

How do we style React components in Next.js?

我们如何在Next.js中设置React组件的样式？

We have a lot of freedom, because we can use whatever library we prefer.

我们有很多自由，因为我们可以使用我们喜欢的任何库。

But Next.js comes with built-in, because that’s a library built by the same people working on Next.js.

但是Next.js内置了 ，因为那是由从事Next.js的同一个人构建的库。

And it’s a pretty cool library that provides us scoped CSS, which is great for maintainability because the CSS is only affecting the component it’s applied to.

它是一个非常酷的库，为我们提供了范围内CSS，这对于可维护性非常有用，因为CSS仅会影响所应用的组件。

I think this is a great approach at writing CSS, without the need to apply additional libraries or preprocessors that add complexity.

我认为这是编写CSS的好方法，无需应用其他会增加复杂性的库或预处理器。

To add CSS to a React component in Next.js we insert it inside a snippet in the JSX, which start with

要将CSS添加到Next.js中的React组件中，我们将其插入JSX的一个片段中，该片段以

and ends with

并以

`}

Inside this weird blocks we write plain CSS, as we’d do in a .css file:

在这个怪异的代码块中，我们编写了纯CSS，就像在.css文件中所做的那样：

You write it inside the JSX, like this:

您可以在JSX内编写它，如下所示：

const Index = () => (  
     
		
      
Home page
		
        
     
)export default Index

Inside the block we can use interpolation to dynamically change the values. For example here we assume a size prop is being passed by the parent component, and we use it in the styled-jsx block:

在块内部，我们可以使用插值来动态更改值。 例如，在此我们假设父组件正在传递一个size道具，并在styled-jsx块中使用它：

const Index = props => (  
     
		
      
Home page
		
        
     
)

If you want to apply some CSS globally, not scoped to a component, you add the global keyword to the style tag:

如果要全局应用某些CSS，而不是将其应用于组件，则将global关键字添加到style标签：

If you want to import an external CSS file in a Next.js component, you have to first install @zeit/next-css:

如果要在Next.js组件中导入外部CSS文件，则必须首先安装@zeit/next-css ：

npm install @zeit/next-css

and then create a configuration file in the root of the project, called next.config.js, with this content:

然后在项目的根目录中创建一个配置文件，名为next.config.js ，其内容如下：

const withCSS = require('@zeit/next-css')module.exports = withCSS()

After restarting the Next app, you can now import CSS like you normally do with JavaScript libraries or components:

重新启动Next应用程序后，您现在可以像通常使用JavaScript库或组件一样导入CSS：

import '../style.css'

You can also import a SASS file directly, using the library instead.

您也可以直接使用库导入SASS文件。

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js如何覆盖组件css样式