Package Exports

protochain

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (protochain) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

protochain

Get the prototype chain of an object or primitive as an Array.

Why

I often write this function, figure I should extract it. There are probably other utilities out there that do this but I couldn't find them so they're either poorly named/described or the search algorithm is not being very helpful or I simply searched for the wrong things.

Installation

> npm install protochain

Usage

ES5

var protochain = require('protochain')

protochain({})
// => [Object.prototype]

protochain(Object.create(null))
// => []

protochain(new Error('message'))
// => [Error.prototype, Object.prototype]

protochain(new TypeError('message'))
// => [TypeError.prototype, Error.prototype, Object.prototype]

// Inheritance

function Person() {

}

function FancyPerson() {
  Person.call(this)
}

FancyPerson.prototype = Object.create(Person.prototype)

protochain(new Person())
// => [Person.prototype, Object.prototype]

protochain(new FancyPerson())
// => [FancyPerson.prototype, Person.prototype, Object.prototype]

// Primitives are OK

protochain(123)
// => [Number.prototype, Object.prototype]

protochain('abc')
// => [String.prototype, Object.prototype]

protochain(/abc/)
// => [RegExp.prototype, Object.prototype]

protochain(true)
// => [Boolean.prototype, Object.prototype]

protochain(false)
// => [Boolean.prototype, Object.prototype]

// Null & Undefined === Empty List

protochain(null)
// => []

protochain(undefined)
// => []

protochain()
// => []

ES6

import protochain from 'protochain'

class Person {}
class FancyPerson extends Person {}

protochain(new Person())
// => [Person.prototype, Object.prototype]

protochain(new FancyPerson())
// => [FancyPerson.prototype, Person.prototype, Object.prototype])

License

MIT