What You Should Know Now — and What's Next

What You Should Know Now

• Core syntax: variables, data types, conditionals, loops, functions
• Arrays and objects, plus modern destructuring/spread syntax
• Object-oriented JavaScript: classes, inheritance, encapsulation, polymorphism, and how this actually works
• The DOM, browser events, and localStorage
• Promises, async/await, and the event loop that makes them work
• Node.js, npm, and building a small Express API
• Testing with Jest, and the basics of browser + Node debugging
• How a production JavaScript application is bundled, tested, and deployed

What Should You Learn Next?

• TypeScript — adds static types on top of everything you just learned, catching a whole category of bugs before the code even runs.
• A frontend framework — React, Vue, or Svelte, built on the DOM and component concepts you already understand.
• A related language — Python if you want to explore backend/data work with a different language's perspective on the same fundamentals.
• SQL and a real database — you've stored data in memory or localStorage; a real database unlocks production-grade applications.

Build Something

Pick a project idea that solves an actual problem you personally have — a tracker, a small tool for a hobby, an automation for a repetitive task — and build it with what you've learned. A real, if small, working project teaches more than any number of additional tutorials.