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How Senior Engineers Build React Apps: Deep Dive

Techmade
6 min readJun 12, 2023

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React, an essential tool in any senior engineer’s arsenal, has gained acclaim for its powerful capabilities in building interactive web applications. To master React, engineers need an in-depth understanding of its foundational principles, best practices, and proficiency in the application of relevant tools for scalable and maintainable application development. Let’s delve deeper into these practices that senior engineers employ when crafting React applications.

Core React Principles Explained and Exemplified

Understanding React’s fundamental principles is crucial in creating scalable and maintainable applications. Here are a couple of these principles with code examples:

One-way Data Flow: Data in React flows unidirectionally from parent to child components. This structure leads to a predictable data flow, making your code easier to manage and debug. For instance, in the code snippet below, the App component passes data to the ChildComponent:

function App() {
const data = "Data from parent component";
return <ChildComponent data={data} />;
}

function ChildComponent(props) {
return <div>{props.data}</div>;
}

Virtual DOM: React’s Virtual DOM, an abstraction of the actual browser’s DOM, optimizes UI updates, ensuring a…

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