wp-calypso/client/me/purchases/manage-purchase/payment-method-selector/payment-method-selector-submit-button-content.tsx

import { FormStatus, useFormStatus } from '@automattic/composite-checkout';
import { styled } from '@automattic/wpcom-checkout';
import { useI18n } from '@wordpress/react-i18n';

const CreditCardPayButtonWrapper = styled.span`
	display: inline-flex;
	align-items: flex-end;
`;

/**
 * The interior of the main submit button in the PaymentMethodSelector for most
 * payment methods. Payment methods which have a special button (eg: PayPal,
 * Google Pay, Apple Pay) will not use this. See each payment method to be sure
 * how it works.
 *
 * This is different from the submit button used by checkout.
 */
export function PaymentMethodSelectorSubmitButtonContent( { text }: { text: string } ) {
	const { __ } = useI18n();
	const { formStatus } = useFormStatus();

	if ( formStatus === FormStatus.SUBMITTING ) {
		return <>{ __( 'Processing…' ) }</>;
	}

	if ( formStatus !== FormStatus.READY ) {
		return <>{ __( 'Please wait…' ) }</>;
	}

	return <CreditCardPayButtonWrapper>{ text }</CreditCardPayButtonWrapper>;
}