reduce an object's prototype chain
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README.md

ReducePrototype

This package contains two little helper functions to work with the prototype chain of an object or a class.

Usage

Just use the functions below as if you would reduce any other iterable, with the only exception, that a fourh parameter sets a constructor which stops the iteration if it's prototype occurs.

import { reducePrototypeChain, reduceInheritanceChain } from "reduce-prototype"

class A {
    test() {}
}

class B {
    test2() {}
}

class C extends A {
    test3() {}
}

const instance = new C();

// now we have the methods test, test2 and test3 in our array
const allMethods = reducePrototypeChain(instance, (dest, proto) => dest.concat(Object.getOwnPropertyNames(proto)), [])
    .filter(key => instance[key] instanceof Function)
    .map(key => instance[key]);

// now we have the methods test2 and test3 in our array
const bAndCMethods = reduceInheritanceChain(C, (dest, proto) => dest.concat(Object.getOwnPropertyNames(proto)), [], A)
    .filter(key => instance[key] instanceof Function)
    .map(key => instance[key])

Testing

You can test reducePrototype with mocha by executing make test in the root directory of the project.

Contributing

If you want to contribute to this repository, please ensure ...

  • to use make for development (it validates the source code and transpiles it to /lib).
  • to follow the existing coding style.
  • to use the linting tools that are listed in the package.json (which you get for free when using make).
  • to add and/or customize unit tests for any changed code.
  • to reference the corresponding issue in your pull request with a small description of your changes.

All contributors are listed in the AUTHORS file, sorted by the time of their first contribution.