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Which UI do you use?
Custom UI
Pre built UI

1. Configuration

1) Install supertokens package #

yarn add supertokens-node supertokens-auth-react supertokens-web-js nextjs-cors

2) Create configuration files #

  • Create a config folder in the app directory of your project.
  • Create an appInfo.ts inside the config folder.
  • Create a backend.ts inside the config folder.
  • Create a frontend.ts inside the config folder.

3) Create the appInfo configuration. #

app/config/appInfo.ts

export const appInfo = {
  // learn more about this on https://supertokens.com/docs/thirdpartyemailpassword/appinfo
  appName: "<YOUR_APP_NAME>",
  apiDomain: "<YOUR_API_DOMAIN>",
  websiteDomain: "<YOUR_WEBSITE_DOMAIN>",
  apiBasePath: "/auth",
  websiteBasePath: "/auth"
}

4) Create a frontend config function #

app/config/frontend.tsx
import PasswordlessReact from 'supertokens-auth-react/recipe/passwordless'
import SessionReact from 'supertokens-auth-react/recipe/session'
import { appInfo } from './appInfo'
import { SuperTokensConfig } from 'supertokens-auth-react/lib/build/types'
import { useRouter } from "next/navigation";

const routerInfo: { router?: ReturnType<typeof useRouter>; pathName?: string } =
  {};

export function setRouter(
  router: ReturnType<typeof useRouter>,
  pathName: string,
) {
  routerInfo.router = router;
  routerInfo.pathName = pathName;
}

export const frontendConfig = (): SuperTokensConfig => {
  return {
    appInfo,
    recipeList: [
      PasswordlessReact.init({
          contactMethod: "^{form_contactMethod}"
      }),
      SessionReact.init(),
    ],
    windowHandler: (original) => ({
      ...original,
      location: {
        ...original.location,
        getPathName: () => routerInfo.pathName!,
        assign: (url) => routerInfo.router!.push(url.toString()),
        setHref: (url) => routerInfo.router!.push(url.toString()),
      },
    }),
  }
}

5) Create a backend config function#

How do you want to identify your users?
Only phone numberOnly emailEmail or phone number
Which authentication type will you use?
OTPMagic linksOTP and Magic link

7) Call the frontend init functions and wrap with <SuperTokensWrapper> component #

  • Create a client component /app/components/supertokensProvider.tsx. This file will initialise SuperTokens and wrap its children with the SuperTokensWrapper component
  • Modify the /app/layout.tsx file to use the SuperTokensProvider component. You can learn more about this file here.
  • An example of this can be found here
/app/components/supertokensProvider.tsx
'use client';
import React from 'react';
import { SuperTokensWrapper } from 'supertokens-auth-react';
import SuperTokensReact from 'supertokens-auth-react';
import { frontendConfig, setRouter } from '../config/frontend';
import { usePathname, useRouter } from 'next/navigation';

if (typeof window !== 'undefined') {
  // we only want to call this init function on the frontend, so we check typeof window !== 'undefined'
  SuperTokensReact.init(frontendConfig());
}

export const SuperTokensProvider: React.FC<React.PropsWithChildren<{}>> = ({
  children,
}) => {
  setRouter(useRouter(), usePathname() || window.location.pathname);

  return <SuperTokensWrapper>{children}</SuperTokensWrapper>;
};
/app/layout.tsx
import './globals.css'
import type { Metadata } from 'next'
import { Inter } from 'next/font/google'
import { SuperTokensProvider } from "./components/supertokensProvider";

const inter = Inter({ subsets: ['latin'] })

export const metadata: Metadata = {
  title: 'Create Next App',
  description: 'Generated by create next app',
}

export default function RootLayout({
  children,
}: {
  children: React.ReactNode
}) {
  return (
    <html lang="en">
      <SuperTokensProvider>
        <body className={inter.className}>{children}</body>
      </SuperTokensProvider>
    </html>
  )
}
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