Interview prep talks a lot about the JavaScript event loop. On the job, eight different concepts matter more. Here are the ones that show up every week in real frontend and full stack work.
The eight concepts
Closures, async/await, modules, destructuring, narrowing, fetch + error handling, TypeScript essentials, and immutability. Pick one a week and write something with it.
Where to practice
Real codebases. Reading a popular OSS project is a better intermediate exercise than the next tutorial.
The bottom line
Most production JavaScript is unspectacular. Get strong on the everyday concepts and the flashy framework knowledge stops being scary.
