Understanding JavaScript fundamentals for better React development

I’ve spent years working across backend, frontend, and a bit of DevOps — and over time, you start noticing patterns. One that really stands out on the frontend side is how often people blur the line between JavaScript and React. React isn’t JavaScript — it’s built on top of it. But I’ve seen a lot of developers who can build complex components and hook-based logic, yet struggle to explain how map(), closures, or the event loop actually work. They use these concepts every day — just through React — without realizing they’re using core JS under the hood. I’ve also come across folks who jump straight to Axios for API calls or Lodash (_) for array and object operations, when plain JavaScript already handles most of it just fine. And when you ask about callbacks, promises, and async/await, the three somehow feel like different things — when in reality, it’s just the same async flow written in different styles. If you can use one, you should be able to refactor it into another. It’s not about memorizing everything or gatekeeping knowledge — it’s about being curious enough to know how things work, not just that they work. Because when something breaks, frameworks don’t always save you — the fundamentals do. The best engineers don’t just use tools — they understand what the tools rely on. #Frontend #JavaScript #React #WebDevelopment #Engineering #Learning #Tech

True.....i am this developer though, I can make a full stack projects but can't do a thing in js, I realized this in a full stack intern role interview where I prepared for the full MERN Stack but taken down by simple js question 😂😂....after realizing this I have started working on my fundamentals on daily basis.......what's your take? What's solution for this? Or any resources?

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