What is JSX and why is it used in React?

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What is JSX and Why It’s Used in React

As a Data Science student, you may already be comfortable with Python, R, SQL, etc. But when building data-driven applications — visualizations, dashboards, interactive tools — front-end technologies like React often come into play. And one key part of React is JSX.

What is JSX?

• JSX stands for JavaScript XML. It is a syntax extension to JavaScript that looks similar to HTML/XML but isn’t HTML. React uses JSX so that you can write markup inside your JavaScript code, which then gets transformed (“transpiled”) into React.createElement(...) calls.

• Under the hood, browsers don’t understand JSX directly. A tool like Babel transforms the JSX into regular JavaScript before running it in the browser.

Why use JSX? What are its benefits

For students learning Data Science, many of whom will build dashboards or data apps, here are the benefits of using JSX:

1. Readable & declarative syntax: JSX lets you write code that looks like a mix of HTML (the structure) with JavaScript (the logic). This makes it easier to see how UI (user interface) relates to data and events.

2. Embedding logic & data easily: Within JSX you can embed expressions (JavaScript variables, functions) inside curly braces {}. For example, displaying data properties, conditional rendering, looping through arrays to show charts or lists.

3. Component-based structure: JSX works well with React’s component model, where you write reusable components. For data science dashboards, where many parts repeat (charts, tables, filters), components help maintain code quality.

4. Better error messages and tooling: Because JSX gives the structure up front, React and its toolchain can provide warnings/errors at compile-time (or in dev mode) more meaningfully. Also IDEs and linters understand JSX.

Some relevant statistics & context

Understanding how common React and JSX are can motivate why it’s worthwhile to learn them:

• In a recent survey of front-end / web framework popularity, React.js remains one of the top frameworks among professional developers. For example, in the 2022 Stack Overflow Developer Survey, approx 42.6% of respondents reported using React.js.

• From industry-trends sources, React is used on over 11 million websites globally in 2025, and has ~4.8% of all websites using it as one of the major JS libraries.

• Among students / learners / those learning to code, React is also highly desired and “used / admired” in many of the State of JS / StackOverflow reports. (This implies that JSX, being core to React’s typical use, has strong relevance for learners.)

These statistics show that learning React + JSX is not just theoretical; many real-world applications and projects use them.

How our Quality Thought courses help you, the Educational Student in Data Science

At Quality Thought, we believe in giving practical, up-to-date, quality knowledge that builds your confidence. Here’s how our courses support you in mastering JSX and React in a Data Science context:

• We teach React from first principles, including JSX, so you understand not just how to write JSX, but why React uses it, how it compiles, and how that affects performance and maintainability.

• In projects / labs, we build dashboards or visualization tools (e.g. with chart libraries, maps) where you will frequently use JSX to build UI components that respond to data. That helps you see where data science meets front end.

• We also cover best practices (for example, organizing components, conditional rendering, code readability) so that what you build is maintainable, clean, and scalable.

• Through hands-on assignments and feedback, you develop not just skill in writing JSX, but also thoughtfulness about architecture, structure, and user experience—this aligns with our commitment to Quality Thought in education.

Conclusion

For Data Science students, learning what JSX is and why it is used in React opens up powerful possibilities: you can build interactive visualizations, dashboards, UI tools that bring your data to life. JSX integrates markup and logic, enabling clarity, reusability, and maintainability. Given how widespread React is (on millions of sites, and preferred by many developers), knowing JSX is a valuable skill in your toolkit. With Quality Thought backed courses that focus on practical applications, hands-on labs, and best practices, you can gain competence and confidence in React and JSX. So, are you ready to start mastering JSX as part of your journey into building data-driven applications?

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