> For the complete documentation index, see [llms.txt](https://docs.loomgate.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.loomgate.io/en/integrations/react.md).

# React

Components and hooks for React 18/19 that work with StrictMode and Next.js.

`@loompay/loomgate-react-sdk` wraps `loomgate.js` as components and hooks for React 18 and 19.

```bash
pnpm add @loompay/loomgate-react-sdk react
```

## Example

```tsx
import { useState } from 'react';
import {
  BrandingElement,
  LoomgatePayment,
  LoomgateProvider,
  PaymentElement,
  loadLoomgate,
  useLoomgatePayment,
  type BillingDetails,
} from '@loompay/loomgate-react-sdk';

// Call loadLoomgate() ONCE, outside render, and only in the browser (pass null on the server).
const loomgatePromise =
  typeof window === 'undefined'
    ? null
    : loadLoomgate('pk_live_…', { apiBaseUrl: 'https://api.loomgate.io' });

export function Checkout({ clientSecret, billing }: { clientSecret: string; billing: BillingDetails }) {
  return (
    <LoomgateProvider loomgate={loomgatePromise}>
      <LoomgatePayment clientSecret={clientSecret}>
        <PaymentElement />
        <PayButton billingDetails={billing} />
        <BrandingElement /> {/* required */}
      </LoomgatePayment>
    </LoomgateProvider>
  );
}

function PayButton({ billingDetails }: { billingDetails: BillingDetails }) {
  const { status, canConfirm, confirm, error, amountTotal, currency } = useLoomgatePayment();
  const [busy, setBusy] = useState(false);
  const [message, setMessage] = useState<string | null>(null);

  if (status === 'error') return <p role="alert">{error?.message}</p>;

  const price =
    amountTotal !== null && currency
      ? new Intl.NumberFormat('en-US', { style: 'currency', currency }).format(amountTotal / 100)
      : null;

  function handleClick() {
    setBusy(true);
    // Don't await anything before confirm().
    confirm({ billingDetails }).then((result) => {
      setBusy(false);
      if (result.error) return setMessage(result.error.message);
      window.location.assign(`/orders/thanks?pi=${result.paymentIntentId}`);
    });
  }

  return (
    <>
      <button type="button" disabled={!canConfirm || busy} onClick={handleClick}>
        {price ? `Pay ${price}` : 'Pay'}
      </button>
      {message && <p role="alert">{message}</p>}
    </>
  );
}
```

## API

| Component                        | Notes                                                                                                                                                                                                                                           |
| -------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `<LoomgateProvider loomgate>`    | `loomgate` is the result of `loadLoomgate()` (a promise or a value), or `null` while it is not loaded. The first non-`null` value is kept: don't call `loadLoomgate()` inline in JSX. After `loadLoomgate()` fails, pass a new promise to retry |
| `<LoomgatePayment clientSecret>` | Owns one session per `clientSecret`. Changing `clientSecret` destroys the old session and creates a new one                                                                                                                                     |
| `<PaymentElement className? />`  | Where the card form is shown                                                                                                                                                                                                                    |
| `<BrandingElement className? />` | The payment partner's branding, **required**                                                                                                                                                                                                    |
| `useLoomgatePayment()`           | `{ status: 'loading' \| 'ready' \| 'error', canConfirm, confirm, error, amountTotal, currency }`                                                                                                                                                |

* `confirm()` works like `session.confirm()` in [loomgate.js](/en/integrations/browser.md): it doesn't throw, and returns `{ status, paymentIntentId }` or `{ error }`.
* `amountTotal` and `currency` are the amount the card form will charge (`null` before the first load). When `confirm()` returns `payment_intent_updated`, `amountTotal` already holds the new amount and `status` is still `'ready'`: let the buyer click again.
* Works correctly under `<StrictMode>`: after mount → unmount → mount there is only one card form.

## Next.js and SSR

The package already includes `"use client"`, so it can be imported from a Server Component. The components are still rendered on the server, so only call `loadLoomgate()` in the browser (as in the example above) and pass `null` when rendering on the server. Create the payment (to get the `clientSecret`) in a Route Handler or a Server Action with the [server SDK](/en/integrations/node-server.md).

## Full example

* [`examples/react`](https://github.com/loomgroup/loomgate-examples/tree/main/examples/react) in the [loomgate-examples repository](https://github.com/loomgroup/loomgate-examples): a complete checkout page built with the React SDK and shadcn/ui, with the server part that creates the payment.
* The [playground](https://examples.loomgate.io) is also built with the React SDK: run each step (fee quote, create a payment, pay, refund) with your own merchant keys and see the code of each step. Payments in the playground use real money, and fees are not refunded.


---

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