https://github.com/ashubham/unwrap-this

unwrap this context of a method and get it as a parameter.
https://github.com/ashubham/unwrap-this

Last synced: 22 days ago
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unwrap this context of a method and get it as a parameter.

• Host: GitHub
• URL: https://github.com/ashubham/unwrap-this
• Owner: ashubham
• License: mit
• Created: 2016-08-12T05:47:22.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2016-08-12T09:13:51.000Z (over 8 years ago)
• Last Synced: 2025-03-18T09:24:02.298Z (about 1 month ago)
• Language: JavaScript
• Size: 6.84 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# unwrap-this

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[![NPM](https://nodei.co/npm/unwrap-this.png?downloads=true&stars=true&downloadRank=true)](https://www.npmjs.org/package/unwrap-this)

Unwrap `this` context of a method and pass it as a parameter.  

Useful when passing callbacks to third-party modules/libraries.

### Installation

`npm i unwrap-this --save`

### Usage

```javascript

var unwrap = require('unwrap-this');

function onEventHappened(self, ...params) {

    // ctx passed as a param instead of being set to `this`.

}

var config = {

    option1: 'test',

    // The lib will call onSomeEvent() with some `this` ctx.

    onSomeEvent: unwrap(onEventHappened)

};

```

A more detailed example could be

```javascript

var unwrap = require('unwrap-this');

function MyClass() {

    this.configOfThirdPartyLib = {

        opt1: true,

        opt2: false,

        onReady: unwrap(this.readyCallback.bind(this))

    };

    

    this.prop1 = 'some prop value';

}

MyClass.prototype.doSomething = function() {};

MyClass.prototype.readyCallback = function(tpInstance, ...params) {

    // Can access myClass instance's methods/props AND ctx of the caller.

    this.doSomething(tpInstance.name);

}

```