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Advanced100 minReact Native

Qualify React Native native parity

Freeze wrapper/native versions, normalize cross-platform results, constrain bridge traffic, recover process death, and release both native targets.

By the endOne JavaScript contract backed by independently qualified Android and iOS behavior.
Real-world scenario

Build against an explicit contract

A React Native product must keep one JavaScript business contract while native wrappers, SDKs, permissions, and release behavior differ by platform.

A Mappls developer projectA restricted React Native applicationFixture data with no production credentialsA request, aggregate, or correlation ID strategy
Step 1

Define the user and system contract

A React Native product must keep one JavaScript business contract while native wrappers, SDKs, permissions, and release behavior differ by platform. Record the region, data freshness, latency budget, privacy purpose, credential owner, and fallback before choosing an SDK or endpoint.

Step 2

Freeze wrapper and native authority

Record React Native/New Architecture mode, wrapper, peer packages, Android/iOS SDK versions, build tools, restriction identities, permission policy, and entitlement in one manifest.

Maps · SDK or product slice
<!doctype html>
<html>
  <head>
    <script src="https://sdk.mappls.com/map/sdk/web?v=3.0&access_token=YOUR_STATIC_KEY"></script>
    <style>html, body, #map { height: 100%; margin: 0; }</style>
  </head>
  <body>
    <div id="map"></div>
    <script>
      const map = new mappls.Map("map", {
        center: { lat: 28.612964, lng: 77.229463 },
        zoom: 12
      });
    </script>
  </body>
</html>
Step 3

Normalize the bridge contract

Use serializable bounded inputs and results, stable Mappls/business IDs, explicit generation and cancellation, backpressure for location events, and no native object retention in JavaScript state.

Step 4

Prove platform parity honestly

Run independent Android and iOS suites for cold/warm launch, background, permission changes, rotation, process death, bridge reload, offline, accessibility, release archive, upgrade, and rollback; document intentional divergence.

Step 5

Prove the production behavior

Automate the happy path and every named failure. The release is ready only when both native targets implement the same portable result schema; bridge reload cannot duplicate tracking or listeners; late callbacks are rejected by generation; each store artifact has separate qualification evidence. Capture provider request identity without logging credentials or unnecessary precise location.

Recovery design

Failure modes you must exercise

wrapper compiles against only one native SDK line

Fail fast with a typed, user-safe outcome and preserve the original request identity.

JavaScript reload leaves a native session active

Keep the last verified state, mark freshness honestly, and retry only within the documented idempotency boundary.

platform permission semantics produce different unhandled states

Reconcile durable local and provider evidence before declaring success or issuing a compensating command.

Never turn uncertainty into success

Timeout after a stateful command is an unknown outcome. Query by provider/idempotency identity or wait for authoritative events; do not blindly retry a new command.

Acceptance criteria

Definition of done

both native targets implement the same portable result schemabridge reload cannot duplicate tracking or listenerslate callbacks are rejected by generationeach store artifact has separate qualification evidence

React Native production checks

Native and wrapper releases are compatibleHigh-frequency events are throttled before crossing the bridgeUnmount releases native views and listenersPlatform-specific behavior is documented, not hidden
Grounded implementation

Continue from source, contracts, and a full app

These links resolve to repository-derived evidence; unsupported package names and endpoints are not filled in from guesswork.

Study the complete Field-service task lifecycle state machine
Tutorial complete

Run it, break it, then observe it

Start with fixture credentials, execute the failure plan, and use request logs, usage, webhook evidence, and operational metrics before promoting traffic.