I'm sure you already know this (although I've had conversations with people that hate on TS in the past, that didn't, hence my post), but Typescript is JavaScript at runtime, there are no performance hits by using it in production (and negligible build times on save during development).

Plenty of people still write JavaScript. TypeScript is rapidly gaining popularity, but I'd be surprised if it's reached even parity with plain JS usage yet. People using Angular are probably mostly using TypeScript, but there are still huge communities (React, Vue, Node.js) where TS is optional.

Still using JavaScript with occasional jQuery over here.

When quick prototyping i prefer plain JavaScript 100% over typescript. Lot less boiler plate than typescript. Faster, no compilation, can run it in a browser console. For larger project I might consider typescript.

Vanilla JS is more rare these days. I interview 2-3 devs per week and always ask basic vanilla JS questions since it’s vital for our workflow that you don’t rely on frameworks we may or may not be using. Knowing react/vue is a bonus, but knowing how to do basic tasks like adding event listeners and manipulating the DOM in vanilla JS is required.

It’s anecdotal but I just wanted to say there are a few places that still haven’t fully committed to a framework.

I’d say at least 1 dev per week can’t add an event listener or manipulate styles in plain JavaScript. It’s getting to the point where I’m going to need to stop asking and just test in whatever framework they know. Then retrain when they come on board.