miki-saarna/react-plaid-link

React bindings for Plaid Link

react-plaid-link

React hooks and components for integrating with the Plaid Link drop module

Install

With npm:

npm install --save react-plaid-link

With yarn

yarn add react-plaid-link

Documentation

Please refer to the official Plaid Link docs for a more holistic understanding of the various Link options.

Examples

Head to the react-plaid-link storybook to try out a live demo.

Using React hooks

This is the preferred approach for integrating with Plaid Link in React.

ℹ️ Note: link_token cannot be null when passed to usePlaidLink. Generate your link_token outside of the component where the hook is initialized.

import React, { useCallback, useState, FunctionComponent } from "react";
import {
  usePlaidLink,
  PlaidLinkOptions,
  PlaidLinkOnSuccess,
} from "react-plaid-link";

interface Props {
  token: string;
}

const PlaidLink: FunctionComponent<Props> = ({ token }) => {
  const onSuccess = useCallback<PlaidLinkOnSuccess>(
    (public_token, metadata) => {
      // send public_token to server
    },
    []
  );

  const config: PlaidLinkOptions = {
    token,
    onSuccess,
    // onExit
    // onEvent
  };

  const { open, ready, error } = usePlaidLink(config);

  return (
    <button onClick={() => open()} disabled={!ready}>
      Connect a bank account
    </button>
  );
};

const App: FunctionComponent = () => {
  const [token, setToken] = useState<string | null>(null);

  // generate a link_token
  React.useEffect(() => {
    async function createLinkToken() {
      let response = await fetch("/api/create_link_token");
      const { link_token } = await response.json();
      setToken(link_token);
    }
    createLinkToken();
  }, []);

  // only initialize Link once our token exists
  return token === null ? (
    // insert your loading animation here
    <div className="loader"></div>
  ) : (
    <PlaidLink token={token} />
  );
};

export default App;

OAuth / opening Link without a button click

Handling OAuth redirects requires opening Link without any user input. This can also be useful if you simply if you want Link to open immediately when your page or component renders.

import React, { useCallback, useEffect, FunctionComponent } from "react";
import {
  usePlaidLink,
  PlaidLinkOptions,
  PlaidLinkOnSuccess,
} from "react-plaid-link";

interface Props {
  token: string;
}

const OpenPlaidLink: FunctionComponent<Props> = ({ token }) => {
  const onSuccess = useCallback<PlaidLinkOnSuccess>(
    (public_token, metadata) => {
      // send public_token to server
    },
    []
  );

  const config: PlaidLinkOptions = {
    // When re-initializing Link after OAuth redirection, the same
    // Link token from the first initialization must be used
    token,
    onSuccess,
    // receivedRedirectUri: document.location.href, // required for OAuth
    // onExit
    // onEvent
  };

  const { open, ready, error } = usePlaidLink(config);

  // this opens link as soon as it's ready
  useEffect(() => {
    if (!ready) {
      return;
    }
    open();
  }, [ready, open]);

  // don't render anything, just open Link
  return null;
};

export default OpenPlaidLink;

Using the pre-built component instead of the usePlaidLink hook

import React, { useCallback, useState, FunctionComponent } from "react";
import { PlaidLink, PlaidLinkOnSuccess } from "react-plaid-link";

const App: FunctionComponent = () => {
  const [token, setToken] = useState<string | null>(null);

  // generate a link_token
  React.useEffect(() => {
    async function createLinkToken() {
      let response = await fetch("/api/create_link_token");
      const { link_token } = await response.json();
      setToken(link_token);
    }
    createLinkToken();
  }, []);

  const onSuccess = useCallback<PlaidLinkOnSuccess>(
    (public_token, metadata) => {
      // send public_token to server
    },
    []
  );

  // The pre-built PlaidLink component uses the usePlaidLink hook under the hood.
  // It renders a styled button element and accepts a `className` and/or `style` prop
  // to override the default styles. It accepts any Link config option as a prop such
  // as receivedRedirectUri, onEvent, onExit, onLoad, etc.
  return token === null ? (
    // insert your loading animation here
    <div className="loader"></div>
  ) : (
    <PlaidLink
      token={token}
      onSuccess={onSuccess}
      // onExit={...}
      // onEvent={...}
    >
      Connect a bank account
    </PlaidLink>
  );
};

export default App;

All available Link configuration options

Please refer to the official Plaid Link docs for a more holistic understanding of the various Link options and the link_token.

See also src/types/index.ts for exported types.

interface PlaidLinkOptionsWithLinkToken = {
  token: string;
  onSuccess: (
    public_token: string,
    metadata: PlaidLinkOnSuccessMetadata
  ) => void;
  onExit?: (
    error: null | PlaidLinkError,
    metadata: PlaidLinkOnExitMetadata
  ) => void;
  onEvent?: (
    eventName: string,
    metadata: PlaidLinkOnEventMetadata
  ) => void;
  onLoad?: () => void;
  receivedRedirectUri?: string;
}

type PlaidLinkOptions = PlaidLinkOptionsWithLinkToken;

Typescript support

TypeScript definitions for react-plaid-link are built into the npm package. If you have previously installed @types/react-plaid-link before this package had types, please uninstall it in favor of built-in types.