Declarative Programming Courses

Functional Programming For Beginners With JavaScript
Udemy

Master Java Reactive Programming with RxJava 2
Udemy

[NEW] Functional programming for javascript developers
Udemy

Functional Programming in Java - Full Course
freeCodeCamp

Functional Programming with PHP
LinkedIn Learning

Learning Functional Programming with JavaScript ES6+
LinkedIn Learning

Learn Alpine JS
Scrimba

Functional Programming with Java Streams API
Amigoscode via YouTube