React SDK

npm install @westyx-nexus/sdk-react

import { NexusProvider } from '@westyx-nexus/sdk-react';

export default function App() {
  return (
    <NexusProvider
      baseUrl="https://your-service.nexus.westyx.dev"
      apiKey="pk_live_..."
    >
      <MyApp />
    </NexusProvider>
  );
}

import { useNexus, useFlag, useConfig } from '@westyx-nexus/sdk-react';

function CheckoutButton() {
  const newCheckout = useFlag('new-checkout', false);
  const apiBase     = useConfig('API_BASE_URL');

  return newCheckout
    ? <NewCheckoutButton />
    : <LegacyCheckoutButton />;
}

import { useEvaluateAB } from '@westyx-nexus/sdk-react';

function FeatureGate({ userId }: { userId: string }) {
  const flags = useEvaluateAB(
    ['checkout-v2', 'new-sidebar'],
    userId,
    { plan: 'pro' },
  );

  return flags['checkout-v2'] ? <CheckoutV2 /> : <CheckoutV1 />;
}