Polyfill different events classes and methods to match last ES7 specifications

Tested on IE 10+

Install

npm i events-polyfill --save

For fast use import 'events-polyfill' (will import index.js).

[INFO] New release v2 that allow you to import specific polyfills only:

• you can use webpack (or any bundler) to import only required polyfills from src/.
• or you can import index.js (or index.min.js) at the root to polyfill everything.

src/constructors/*.js

Polyfill for : Event, CustomEvent, MouseEvent, KeyboardEvent, FocusEvent PointerEvent

src/ListenerOptions.js

Polyfill for the options argument of :

EventTarget.prototype.addEventListener(type, listener[, options]);
EventTarget.prototype.removeEventListener(type, listener[, options]);

options : last parameter which replace boolean useCapture

• once : trigger only once this event (default: false)
• passive : allow browser to continue animations (ex: while scrolling) by 'disabling' event.preventDefault() (default: false)
• capture : replace useCapture (default: false)

Example:

document.addEventListener('click', function() {
    console.log('clicked once');
}, { once: true });

src/ListenerEventTypes.js

Polyfill for the type argument of :

EventTarget.prototype.addEventListener(type, listener[, options]);
EventTarget.prototype.removeEventListener(type, listener[, options]);

Polyfill vendor prefixed events like 'pointerlockchange' (try 'pointerlockchange', 'mozpointerlockchange' and 'webkitpointerlockchange') and some 'experimental' events like 'wheel' (try 'wheel', 'mousewheel', 'DOMMouseScroll')

• [INFO] If option can't be polyfilled : throw an error (allow you to check is event type is supported)

Currently polyfilled types :

[
    'wheel',
    'pointerlockchange', 'pointerlockerror',
    'fullscreenchange', 'fullscreenerror',
    'animationend', 'animationiteration', 'animationstart', 'transitionend',
    'pointercancel', 'pointerdown', 'pointerhover', 'pointermove', 'pointerout', 'pointerover', 'pointerup'
]