A decorator is the core concept when developing an angular framework with VERSION 2 and above. It may become a core language feature for JAVASCRIPT soon. In angular 4, decorators are used extensively and are ALSO used to compile a code.

There are 4 different types of decorators:

1. Class decorators
2. Property decorators
3. Method decorators
4. Parameter decorators

A decorator is a function that is invoked with a prefix “@” symbol and is immediately FOLLOWED by a class, parameter, method, or property. A decorator returns the same thing which was given as an input but in an augmented form.

A decorator is the core concept when developing an angular framework with version 2 and above. It may become a core language feature for JavaScript soon. In angular 4, decorators are used extensively and are also used to compile a code.

There are 4 different types of decorators:

A decorator is a function that is invoked with a prefix “@” symbol and is immediately followed by a class, parameter, method, or property. A decorator returns the same thing which was given as an input but in an augmented form.