One of my favorite online learning resources for JavaScript and front-end development is Egghead.io.
They offer some free resources. But their premium tier is worth the money.
At the moment, they offer a steep discount (USD $150 instead of $250 for their yearly plan).
Some of my favorite courses:
- Just Enough Functional Programming in JavaScript
- Data Structures and Algorithms in JavaScript
- Professor Frisby Introduces Composable Functional JavaScript
- Functional Programming in JavaScript with Ramda.js
- Simplify React Apps with React Hooks
Check out their sale! Still 3 days to go.