React Native Research & Evidence-Based Practice 3

Question 1

Empirical studies on cross-platform React Native code reuse report what typical percentage of shared code between iOS and Android when using a single codebase?

Accepted Answer

70–90%

Answer

Industry reports from teams like Airbnb and Discord estimate 70–90% shared code, with platform-specific files handling the remainder via the .ios.js / .android.js convention.

Question 2

Research into React Native state management shows which library has become the evidence-based default for global state in large-scale apps as of 2024?

Accepted Answer

Redux Toolkit (RTK)

Answer

Redux Toolkit eliminates Redux boilerplate and is the official, community-validated evolution of Redux, consistently ranked as the top production state management choice in React Native surveys.

Question 3

A developer is evaluating navigation libraries. According to community adoption data and React Native docs, which library is the recommended standard?

Accepted Answer

react-navigation

Answer

react-navigation is the React Native team's recommended navigation solution and has by far the largest community adoption, ecosystem support, and documentation.

Question 4

Evidence-based testing strategy for React Native recommends the primary tool for component-level unit tests that avoid testing implementation details?

Accepted Answer

React Native Testing Library (RNTL)

Answer

React Native Testing Library encourages testing user-visible behavior (what the user sees and interacts with) rather than implementation details, aligning with modern testing best practices.

Question 5

Research on React Native accessibility shows which prop is the most critical for making custom touchable elements understandable to screen readers?

Accepted Answer

accessibilityRole

Answer

accessibilityRole communicates the semantic role of an element (button, link, header, etc.) to assistive technologies, which is the highest-priority prop for screen reader comprehension.

React Native Practice Test

React Native Practice Test

React Native Research & Evidence-Based Practice 3