Importing react into pages in next.js

问题

I have a Next.js app with several pages in it. All of the pages look similar.

import React, { Component } from "react";
import  from "components/Wrapper";

export default class About extends Component {
  render() {
    return <Wrapper />;
  }
}

I would like to refactor it using functional component.

I read here that you don't have to import react package here in a page due to next.js routing system. Next.js docs also show examples without react import on a page component, but no explanation given.

Can you clarify please. Is it necessary to import React at all in this case? Can I remove the import React line?

回答1:

Well, actually it is still a complicated issue for all of us to realize when to use import React from "react"; and when not to in Next.js apps. But according to Tim Neutkens co-author of Next.js, in this thread he mentioned:

Next.js automatically adds the React import when JSX is used indeed. However keep in mind that we do still need to import React from 'react' when the React variable is used.

So this will show us, whenever we just want to use JSX feature alone from React we do not have to import React from 'react' and Next.js will implicitly import it for us, but in any other case we have to do that.

来源：https://stackoverflow.com/questions/63090037/importing-react-into-pages-in-next-js