- MDN, the go-to place for a quick reference to
Bonus: it has a super handy search box that allows instant search by pressing the slash (/) on that page.
- Exploring JS series, where to learn
Bonus: most of the books are free to read online!
- TC39, the ECMAScript
Bonus: it helps to fall asleep quickly.
Bonus: it provides beautiful gif animations for easy visualizations.