Essential JavaScript Topics You Need to Learn Before ReactJS

As developers, we all need to keep evolving with technology. When I started web development, it was a time when static websites dominated the internet. Dynamic sites were rare and often difficult to build individually.

But over time, things started to change with the introduction of new frameworks and libraries. One of the most impactful among them was ReactJS. Although React was introduced to the public in 2013, it didn’t gain widespread popularity until around 2020 — mainly because it was still in its early development phase, and most developers preferred stable technologies over evolving ones.

As developers, we must constantly learn new tools and frameworks. You can probably relate to this — learning your first programming language is always the hardest, but once you’ve learned one, the next becomes much easier. That’s because we learn by comparison and cognition.

When I started learning ReactJS, I realized how important it is to have a strong foundation in JavaScript. So, I decided to share my experience with beginners who are starting their journey with ReactJS.

Essential JavaScript concepts you should understand well before diving into React:

1. Data Types

2. Conditionals (if-else, switch-case)

3. Loops (for, foreach, while)

4. DOM (Document Object Model)

5. Event Listeners

Mastering these five topics will give you a solid foundation to start building with ReactJS confidently.

This is advice from an experienced developer who has gone through the same journey.

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