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How Senior Engineers Build React Apps

5 min readMar 21, 2023


React has become one of the most popular and widely used JavaScript frameworks in recent years, thanks to its powerful capabilities for building dynamic, interactive web applications. Senior engineers with expertise in React have a deep understanding of the framework’s core principles and best practices, as well as the tools and techniques needed to create scalable, maintainable code.

In this article, we’ll explore the key strategies that senior engineers use to build React apps that are both powerful and efficient. We’ll look at the core principles of React, the best practices for structuring and organizing your code, and the tools and techniques that can help you optimize your app’s performance and scalability.

Whether you’re a seasoned React developer or just starting out, understanding these strategies can help you take your skills to the next level and build apps that are both effective and elegant. So let’s dive in and take a closer look at how senior engineers build React apps.

Core Principles of React

At the heart of React lies a set of core principles that underpin the entire framework. Understanding these principles is key to building scalable, maintainable React apps.

One of the most fundamental principles of React is the concept of “one-way data flow”. This means that data flows in a single direction through your app, from parent components down to child components. By structuring your app in this way, you can create a clear and predictable data flow that makes it easier to manage and debug your code.

Another core principle of React is the use of a `virtual DOM` (Document Object Model). The virtual DOM is an abstraction of the browser’s native DOM, which allows React to update the UI more efficiently by minimizing the number of actual DOM updates required. By using the virtual DOM, React can update the UI in a way that is both fast and responsive, without requiring unnecessary re-renders or updates.

Best Practices for Structuring and Organizing Your Code

Building scalable, maintainable React apps requires careful planning and organization. Here are some best practices to keep in mind:




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