Is JavaScript still worth learning or should I start with TypeScript?

Start with JavaScript for the first 2–3 months, then add TypeScript — it's a layer on top, not a different language. Everything you learn in JS transfers 100%. Why not TS from day one? Because as a beginner you'll fight two battles at once: understanding what your code does AND satisfying the type checker. Early on, the type errors are noise that slows the feedback loop you need to actually learn. The switch itself takes about two weeks once you're comfortable with JS. Convert one of your existing projects to TypeScript — that's the fastest way to learn it, and yes, list both on your resume.