- Bite-sized, vetted and tested exercises on MisterDa (150+ exercises).
- Easy syntax exercises on W3Schools (67 exercises)
- Browser-side quiz on W3Schools (25 questions)
- JavaScript basics on JSchallenger (101 exercises)
- JavaScript DOM on JSchallenger (19 exercises)
- Random JavaScript exercises on JSchallenger (80 exercises)
- LeetCode (1000+ problems)
- Exercism (142 exercises)
- Math-related problems on Project Euler (841 problems)
- Edabit (2500+ challenges)
- Codewars (6000+ exercises)
- JS Is Weird (25 questions)
- JavaScript Quiz (10 questions)
- CodesCracker (several quizzes)
- JavaTpoint (several quizzes)