The video explains that JavaScript, which is a functional programming language, also supports classes. There are built-in classes in JavaScript runtimes such as the class for regular expressions and arrays. The video also mentions that it is possible to create custom classes in JavaScript and use them in type annotations. A specific example of a user-created class, "queue," is mentioned and explained as a first#javascript
#classes #classes
#regularexpressions
#arrays
#typescript
#generics
#typescripttutorial
#Queue
#TypeAnnotation
#FunctionalProgramming
#CollectionClasses
#FirstInFirstOut
#ProgrammingLanguage-in-first-out collection.