React Library: deep understanding of the React library, including components, props, state, and the virtual DOM. They know how to create and manage React components and how to structure an application using a component-based architecture.
Component Lifecycle: React components have a lifecycle, and React developers understand the different lifecycle methods, such as component Did Mount, component Did Update, and `component Will Unmount.”
State Management: know how to manage the state of components and how to handle user interactions and dynamic content within their applications.
React Router: Familiarity with React Router, a popular routing library for React, is essential for creating single-page applications with multiple views.
State Management Libraries: often use state management libraries like Redux or Mobx to manage the state of larger applications.
HTTP Requests: Knowledge of making HTTP requests to APIs and handling asynchronous operations is crucial. Popular libraries for this include Axios and the fetch API.
Component Styling: experienced in applying styles to components. This can be done using CSS, CSS-in-JS solutions like styled-components, or CSS preprocessors like SASS.
Testing: Writing unit tests for React components is a best practice. React developers use testing libraries like Jest and Enzyme for this purpose.
Build Tools: React projects are often set up and configured using build tools like Webpack or Create React App. React developers understand how to configure and customize these tools.
Version Control: Proficiency in using version control systems like Git for code collaboration and management is essential.
Debugging: skilled at debugging React applications using browser developer tools, React DevTools, and other debugging techniques.
Performance Optimization: They optimize React applications for performance and understand concepts like memorization, code splitting, and lazy loading.
Responsive Design: Ensuring that React applications work well on different screen sizes and devices through responsive web design is an important skill.
Team Collaboration: often work in teams, so strong collaboration and communication skills are valuable.
React developers are in high demand because React is a popular library for building modern web applications. They create interactive, user-friendly, and scalable interfaces for a variety of web and mobile applications.