mdn-custom-event-polyfill

This is a MDN implementation of CustomEvent API for browsers that don't support it.

Intstall

Using yarn:

1  yarn add @codevadmin/mdn-custom-event-polyfill -S

Using npm:

1  npm i -S @codevadmin/mdn-custom-event-polyfill

Usage

Just import this polyfill before using any code with CustomEvent object.

1import '@codevadmin/mdn-custom-event-polyfill';
2
3const body = document.querySelector('body');
4const payload = [0, 1, 2, 3];
5const event = new CustomEvent('run', { 
6  detail: { 
7    payload,
8  },
9});
10
11body.dispatchEvent(event);

Support

It was successfully tested in IE 11. MDN tells the polyfill will work in IE 9+.