Easy multiple inheritance and composition in JavaScript.
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·
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Multi-inheritance/composition is a very useful feature of Object Oriented Programming, but JavaScript's Class
syntactic sugar does not allow for extending multiple parent classes. This library provides an easy way to solve that, without the need for mixin chains or functions.
This library has zero dependencies. To get up and running in your project, just go ahead and install.
Install the library with
npm install @kbravh/multi-class
or
yarn add @kbravh/multi-class
Import the library, then create a couple of parent classes. A common pattern uses "Has" or "With".
const multiclass = require('@kbravh/multi-class')
class HasName {
constructor({name}){
this.name = name
}
}
class HasAge {
constructor({age}){
this.age = age
}
}
Then, create your subclass and extend the parent classes using the multi-class
function.
class Person extends multiclass(HasName, HasAge){
// The constructor is called implicitly
getNameAndAge(){
return `${this.name} is ${this.age} years old.`
}
}
Finally, create an instance of your new class and see the magic!
let person = new Person({
age: 22,
name: "Leeloo"
})
person.getNameAndAge() // Leeloo is 22 years old.
Nota bene: If your parent classes have different parameters for their respective constructors, an easy way to handle this is by passing in all arguments in a JSON object and destructuring them in the constructors, as is done above.
Don't like the name multiclass
? Just change the name on import and inherit to your heart's content.
const 🤖 = require('@kbravh/multi-class')
class Person extends 🤖(HasName, HasAge){...}
See the open issues for a list of proposed features (and known issues).
Contributions are what make the open source community such an amazing place to be learn, inspire, and create. Any contributions you make are greatly appreciated.
- Fork the Project
- Create your Feature Branch (
git checkout -b new-feature
) - Be sure to run linting! (
yarn lint
) - Commit your Changes (
git commit -m 'Add something cool!'
) - Push to the Branch (
git push origin new-feature
) - Open a Pull Request
Distributed under the MIT License. See LICENSE
for more information.
Karey Higuera - @kbravh - [email protected]
Project Link: https://github.com/kbravh/multi-class