A polyfill for creating CustomEvents on IE9+ if the native implementation is missing.

# using yarn
$ yarn add custom-event-polyfill

# using npm
$ npm install --save custom-event-polyfill

Just include this polyfill before using any code which creates a CustomEvent object, ideally as early as possible.

Refer to the CustomEvent documentation for details on how to use it: https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent

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MIT