Using createGetInitialProps with NextJS Functional Components

Mantine is a UI component library I love.

The Mantine docs show how to use Mantine in combination with NextJS. You have to use a createGetInitialProps function in the pages/_document.tsx, but their example uses a React class component.

No one likes class components.

So I'll show you how to do it with a functional component.

I assume you're somewhat familiar with NextJS and are trying to configure Mantine. The _document.tsx file is just a part of the NextJS file structure (more info in the NextJS docs)

Using createGetInitialProps with a functional component is pretty straightforward. All you have to do is define a getInitialProps function inside your component.

Here's an example of how your pages/_documents.tsx file could look like:

import { Html, Head, Main, NextScript } from "next/document";
import { createGetInitialProps } from "@mantine/next";

const getInitialProps = createGetInitialProps();

type Props = {
  initialProps: any;

function Document({ initialProps }: Props) {
  return (
    <Html lang="en">
      <Head />
        <Main />
        <NextScript />

Document.getInitialProps = getInitialProps;

export default Document;

As you can see, the function getInitialProps returned by createGetInitialProps() is attached to the Document as a static method.

And that's it! You now have a Document functional component with getInitialProps support.

I hope this helps!