# Decorator in JavaScript and Typescript

* In JavaScript, we can apply decorators to class fields, methods, and the entire class. Therefore, we can’t use decorators on plain objects. They only work with classes.
* Decorators are not a standard JavaScript feature. They are in stage 3 of the ECMA TC39 specification phase. To use JavaScript Decorators we need to set up a transpiler tool in our development environment, like Babel.
* Decorator is concept and can be in form of function or start with `@`.

There are function decorator and class and it's member decorator. Fot indepenedent/global function we can decorate it by wrapping it inside another  function but for class decorator we can use the `@` symbol and typescript or bable library.


# References
* https://medium.com/@victortoschi/using-decorators-in-javascript-e80674e4c6fa
* https://www.sitepoint.com/javascript-decorators-what-they-are/
* https://www.typescriptlang.org/docs/handbook/decorators.html
https://medium.com/codelit/functional-programming-in-javascript-decorators-43eef1c49cf3