Category: Testing and Debugging

Introduction Forms are a fundamental part of any web application. They allow users to enter and submit data — such as login credentials, registration details, or feedback — that drives the app’s interactivity and functionality. In React applications, forms often involve state management, event handling, and validation logic, making them a crucial area for thorough…

Debugging is one of the most important and time-consuming parts of software development. In React applications—where UI, state management, and asynchronous operations often interact—having a solid debugging strategy is essential for maintaining efficiency and code quality. Effective debugging not only helps developers locate and fix issues faster but also improves understanding of how React’s lifecycle,…

Introduction When building React applications, your components often depend on data fetched from APIs — whether it’s a list of users, products, or posts. Testing these components directly with real API requests can be slow, unreliable, and dependent on external servers. That’s why mocking API requests is such an essential part of writing unit and…

Testing React applications effectively requires the ability to isolate components and their dependencies. Often, components interact with external modules, APIs, or complex logic that you don’t want to execute during testing. Jest, one of the most popular testing frameworks for JavaScript and React, provides mock functions and module mocking capabilities to handle these cases efficiently.…

Introduction Component testing is one of the most critical aspects of building reliable and maintainable React applications. Since React applications are built from reusable components, ensuring that each component behaves correctly and interacts as expected with users is essential. React Testing Library (RTL) has become the standard tool for testing React components. It is designed…

Introduction When building modern React applications, ensuring that your app behaves correctly from the user’s perspective is critical. Unit tests and integration tests validate individual pieces of functionality, but they don’t guarantee that the app works seamlessly when all parts are combined. That’s where End-to-End (E2E) testing comes in — it verifies that the entire…

Introduction In the world of modern frontend development, maintaining a consistent and reliable user interface is just as important as implementing new features. React applications, by nature, are made up of many reusable and interactive components. As your app grows, it becomes challenging to ensure that a component’s structure or output doesn’t change unexpectedly during…

Testing is one of the most critical parts of software development, especially when working on scalable React applications. Unit testing ensures that individual pieces of your code — such as functions, components, and hooks — behave as expected. It helps developers catch bugs early, maintain consistency, and refactor confidently without breaking existing functionality. Jest is…

Introduction Debugging React applications can be both a challenging and enlightening process. React, being a dynamic and component-based JavaScript library, offers flexibility but introduces complexity in tracking how data flows between components, how state updates propagate, and how asynchronous actions affect rendering. In large-scale React projects, bugs can occur due to incorrect prop passing, asynchronous…