es3-ext

ECMAScript 3 extensions

(with respect to ECMAScript 5 standard)

Provides just basic utilities (and shims) which help setup basic configurations in ES3 engines.

See es5-ext project for extensive list of ECMAScript 5 based extensions

Usage

ECMAScript 5 features

You can force ES5 features to be implemented in your environment, e.g. following will assign bind function to Function.prototype (only if it's not implemented already).

require('es3-ext/function/#/bind/implement');
function () { return this.x; }.bind({ x: 'foo' })(); // 'foo'

You can also access shims directly, without fixing native objects. Following will return native Function.prototype.bind if it's available and fallback to shim if it's not.

var bind = require('es3-ext/function/#/bind');
bind.call(function () { return this.x; }, { x: 'foo' })(); // 'foo'

If you want to use shim unconditionally (even if native implementation exists) do:

var bind = require('es3-ext/function/#/bind/shim');
bind.call(function () { return this.x; }, { x: 'foo' })(); // 'foo'

List of ES3 shims

• Function.prototype.bind -> require('es3-ext/function/#/bind')

API

Date Constructor extensions

parse(str) (es3-ext/date/parse)

Limited version of ECMAScript's Date.parse. Return date object for string representation in ISO 8601 format. Returns NaN if format matches but requested date is invalid. undefined if string format doesn't match ISO 8601

Function Prototype extensions

fn.bind(context[, …args]) (es3-ext/function/#/bind)

Introduced with ECMAScript 5.
The bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called. See: MDN: Function.prototype.bind

Installation

npm

$ npm install es3-ext

Browser

You can easily bundle es3-ext for browser with any CJS bundler (no favorite? Try: Browserify, Webmake or Webpack)

Tests

$ npm test