# bind.for

**Repository Path**: mirrors_WebReflection/bind.for

## Basic Information

- **Project Name**: bind.for
- **Description**: A lazy Function.prototype.for(context) bind helper
- **Primary Language**: Unknown
- **License**: ISC
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-18
- **Last Updated**: 2025-12-27

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# bind.for

[![Build Status](https://travis-ci.com/WebReflection/bind.for.svg?branch=master)](https://travis-ci.com/WebReflection/bind.for) [![Coverage Status](https://coveralls.io/repos/github/WebReflection/bind.for/badge.svg?branch=master)](https://coveralls.io/github/WebReflection/bind.for?branch=master)

A lazy `Function.prototype.for(context)` bind helper.

This is an alternative take at the same problem [bound-once](https://github.com/WebReflection/bound-once#readme) would like to solve, except this should perform better for the following reasons:

  * the `WeakMap` is lazily created once per each _method_
  * because it's usually the _method_ that binds multiple contexts, and not the other way around, this approach requires less moving parts
  * _bound-once_ looks up for the method, either as function or as a string, then it weakly refers the context to a new `Map`, if not previously referenced, then it performs a lookup via such map to return the bound method, or it stores it in there once and return. _bind.for_ here, looks up for the context right away, and it stores once the bind of itself if the content wasn't previously stored. This is one operation instead of 3.

By default, this module pollutes the `Function.prototype` with a lazy `for` method, but if that's not your cup of tea, you can include the _ponyfill_ instead.

```js
// global Function.prototype pollution
import 'bind.for';

const context = {};

method.for(context) === method.for(context);
method.for(context)() === context;

function method() {
  return this;
}

// clean ponyfill
import bindFor from 'bind.for/pony';

// will add the lazy `for` method
const fn = bindFor(function () { return this; });
fn.for(context) === fn.for(context);
```