## LinkAuthenticationElement

Use the `LinkAuthenticationElement` from `@stripe/react-stripe-js` to collect email addresses
and allow users to log into Link on your checkout page.

The component must be rendered inside an [Elements Provider](/js/react_stripe_js/elements/elements_provider.md).

### Props

- `id` (string)
  Sets the DOM `id` attribute on the rendered Element container. Use this to
target the Element for styling or testing.

- `className` (string)
  Applies custom CSS classes to the Element container.

- `options` (object)
  Options for creating the Link Authentication Element.

  - `defaultValues` (object)
    Provide the initial contact information that will be displayed in the Link Authentication Element.
The form will render with empty fields if not provided.

    - `email` (string)

- `onChange` (function)
  Callback called when any value in the [change event payload](/js/element/events/on_change?type=linkAuthenticationElement.md#element_on_change-handler) changes.

- `onReady` (function)
  Callback called once the Element is fully rendered.
Recieves the [ready event payload](/js/element/events/on_ready.md#element_on_ready-handler).

- `onBlur` (function)
  Callback called when the Element loses focus.

- `onFocus` (function)
  Callback called when the Element receives focus.

- `onEscape` (function)
  Callback called when the escape key is pressed within the Element.

- `onLoaderStart` (function)
  Callback called right before Stripe displays the Element skeleton loader.
Receives the Element instance as its only argument.

- `onLoadError` (function)
  Callback called when the Element fails to load.

### Render LinkAuthenticationElement

```jsx
import React from 'react';
import {Elements, LinkAuthenticationElement} from '@stripe/react-stripe-js';
import {loadStripe} from '@stripe/stripe-js';

const stripePromise = loadStripe('{TEST_PUBLISHABLE_KEY}');

export const App = ({clientSecret}) => (
  <Elements stripe={stripePromise} options={{clientSecret}}>
    <LinkAuthenticationElement />
  </Elements>
);
```