Lightweight, solid, framework agnostic and easy to use library written in TypeScript to deal with Cross Cutting Concerns and improve modularity in your code.
This library provides a straightforward manner to implement Advices in your app. Advices are pieces of code that can be plugged in several places within OOP paradigm like 'beforeMethod', 'afterInstance'.. etc. Advices are used to change, extend, modify the behavior of methods and constructors non-invasively.
For in deep information about this technique check the resources.
https://jsbin.com/bogecojuvi/edit?js,console
npm install kaop-ts --saveUse a join point to plug it to any method/class:
import { afterMethod } from 'kaop-ts'
const double = afterMethod(meta => meta.result *= 2)
class DummyExample {
@double
static calculateSomething (num, num2) {
return num * num2
}
}
DummyExample.calculateSomething(3, 3) // 18
DummyExample.calculateSomething(5, 5) // 50- Advices no longer use
thisto access several utilities. - Metadata properties have been renamed. Here you can check the reference .
- JoinPoints support multiple advices:
// join point decorators expect a list of advices
@beforeMethod(advice1, advice2, advice3)
// even you can provide an advice array using spread operator
@beforeMethod(...adviceList)
someMethod() {
}- Docs
- Troubleshooting
- Community ideas/contributions
- @jcjolley ES7 Async/Await Support
- @kailashthakuri Apply advices to all methods within a class
- @alexjoverm onException Join Point
- Some Examples (older version, API may defer)
- Article series - Idiomatic JavaScript Backend - part 1/3
- Repo - based on Article series on dev.to
- Repo - AngularBeers (bcn) Separation of Concerns in modern JavaScript
- Video/Talk - AngularBeers (bcn) Separation of Concerns in modern JavaScript
- Article about Angular2+, Decorators and SRP
- Aspect Oriented Programming in Javascript (ES5+\Typescript)
- How To Handle Exceptions With Aspect Programming And Blame Covfefe
- kaop ES5 version
- Slides about AOP
Made using TypeScript Library Starter