Class Fillable DTO with validation functionality.

Modular utility library for JavaScript.

JavaScript V8 engine specific utilities

TypeScript common types.

Utilities and tools to help build HTTP requests.

Decorators for modern JavaScript

Allows use of decorator and non-decorator based validation. Internally uses `class-validator` to perform validation.

Addition of a method that will add a value to a map if the map does not already have something at key, and will also update an existing value at key.