IE8-EventListener

A polyfill for IE8

How can I get it?

IE8-EventListener is available through npm and can be installed with the following command:

npm install ie8-eventlistener

What is it?

IE8-EventListener strives to add full addEventListener compliance to IE8. Specifically:

• Listeners are executed in the order in which they were added
• Modifying the event object in one listener does not affect the event object in other listeners
• Events not present on window in IE8, but that are supported on document are put on the document but triggered with the window context
• localStorage Storage Events will appear propery in IE8 with the key, newValue, and oldValue properties correctly set as long as window['ie8-eventlistener/storage'].setItem is used instead of window.localStorage.setItem. Currently does not support the storageArea and url properties of Storage Events, but those are rarely used.

Why does it exist?

I wanted to try to support Storage Events for use in https://github.com/tejacques/crosstab, and after scouring the web for polyfills was unable to find one which worked correctly. Using the excellent Financial Times polyfill project as a basis, I added support for Storage Events, and brought the behavior of event listeners closer to the spec.

Inspiration

• https://github.com/tejacques/crosstab
• https://github.com/Financial-Times/polyfill-service
• https://github.com/jonathantneal/EventListener

Licence

Because this is based on Johnathan Neal's https://github.com/jonathantneal/EventListener and the Financial Times https://github.com/Financial-Times/polyfill-service, this version is released under the CC0 1.0 Universal License