[citeguised]

"JavaScript: Understanding the weird parts" by Anthony Alicea is a high-quality course which helped me understand JS on a more fundamental level. This is the main one I always recommend for folks who know JS, but would like to take a step further: https://www.udemy.com/course/understand-javascript/

[mseidl]

This hasn't been updated in 5 years.

[barbecue_sauce]

That was the first Udemy course I bought, and was fairly surprised by the quality. Anthony Alicea hasn't released anything for a while, so I'm wondering if the relatively immense success of his courses has made him financially independent.