1. Do you want to get a job, or
2. Do you want to build amazing thing
The technologies that will get you a job are not the ones that build amazing things. I was a JavaScript developer for more than 15 years, but now I do something different.
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* Any of Node.js / Bun / Deno. I know they are not front end, but mastering them will super charge your localhost development.
* TypeScript
* Chart.js
* HTML video/audio tags. Building your own media player in the browser is ridiculously easy.
* Web Sockets, and also Web Transport. Web Transport is not all the way there yet, but it looks like it might be the replacement for Web Sockets