The 80/20 Rule of JavaScript: Focus on What Really Matters
6/26/2025
Let's be real—you could spend months chasing every obscure corner of JavaScript, but would it actually make you a better dev? 🤔 Probably not. But here's the thing: according to the 80/20 Rule (aka the Pareto Principle 🎲), 80% of your results come from 20% of what you practice. In JavaScript, this means doubling down on the foundational skills that show up everywhere in real-world code.
Focus on:
- Writing clean functions and manipulating arrays. 🧠
- 🧰 Creating and using objects like a boss.
- Grasping closures, scope, and async/await without your brain short-circuiting. ⚡️
- 🕹️ Handling events, updating the DOM, and working with APIs.
These aren't “beginner topics”—they're essential tools you'll use again and again, from junior tasks to senior gigs, that will take you way further than spending hours tweaking 'reduce()' into submission only to impress your rubber duck. 🦆
So, stop spreading your energy thin trying to “learn it all”
Instead, drill the essentials until they're second nature: understanding and applying the 20% that truly moves the needle. That's what real-world devs do.
Ready to be the dev who knows what matters and can prove it with confidence? Kadmía helps you cut through the noise so you can practice what actually shows up in job interviews, code reviews, and real-life projects. 🧩 Fun challenges. Smart feedback. Progress you can feel. No fluff. No filler.
Get intentional with your practice—step in the fun and start building the kind of skills that stick with our help. 🚀