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auto-bind-proxy

v1.0.1

Published

Get a proxy that automatically binds methods to their instance

Downloads

514

Readme

auto-bind-proxy

License Build status

Get a proxy that automatically binds methods to their instance

Inspired by Sindre Sorhus's auto-bind package, but instead of altering the target object, it returns an ES6 proxy that will automatically bind any accessed functions to the instance.

This package assumes the existence of some ES6 features such as Proxy, it works with Node 6+.

Installation

npm install auto-bind-proxy
var autoBind = require('auto-bind-proxy');

Example

const ab = require('auto-bind-proxy');

class Unicorn {
    constructor(name) { this.name = name; }
    message() { return `${this.name} is awesome!`; }
}

const unicorn = new Unicorn('Rainbow');

// Grab the method off the instance
// same as `message = unicorn.message.bind(unicorn)`
const message = ab(unicorn).message;

// Still bound to the instance
message();
// -> 'Rainbow is awesome!'

// Properties that are not functions are returned normally
ab(unicorn).name === unicorn.name;
// -> true

const foo = {
    bar() { ... }
    baz() { ... }
    qux() { ... }
    ...
};

// Multiple methods can be retrieved
const { bar, baz, qux } = ab(foo);

API

autoBind(obj)
var autoBind = require('auto-bind-proxy');
  • obj: a non-null object;

  • returns a proxy that automatically binds retrieved methods to obj on access.

License

MIT