I just had a job interview for a senior developer role focusing on React JS, and they asked me about the DOM and virtual DOM, including how React handles DOM updates. I was prepared and managed to answer, but I'm really puzzled about the reasoning behind such questions. How does knowing about the DOM and virtual DOM make me a better developer?
5 Answers
Honestly, they might have just pulled those questions from some generic list on the internet. While it feels like a basic question, understanding concepts like these helps avoid performance pitfalls and bugs further down the line.
Questions like these may seem basic, but they can quickly differentiate candidates. While practical experience is important, understanding the internals of the tools you use shows that you're genuinely invested in your work and craft.
That makes sense! It's frustrating to see interviewers stick to theoretical questions instead of real-world scenarios.
It's essential to understand the virtual DOM because it's at the core of how React operates. Without it, React wouldn't function as we know it today. Some other frameworks don't use a virtual DOM, and having this knowledge helps in building optimized applications. It's a fundamental concept for anyone serious about React development!
I've been using React since 2021, and I didn't even realize the virtual DOM was a thing! Guess it's time to do some research!
Understanding the rendering cycle in React is crucial for building efficient component structures. It helps with timing updates in relation to browser paints and optimizing how components render, which leads to better performance in your applications.
As a senior developer, it's expected that you know how React works under the hood. This isn't just about knowing what a virtual DOM is; it's about being able to make informed decisions about when to deploy certain libraries or frameworks, based on your understanding of the fundamentals.
Haha, yeah, I’ve seen lists like that! It's frustrating when they stick to the same old questions.