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fix: remove node event emitters#161

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achingbrain merged 4 commits intomasterfrom
fix/remove-node-event-emitters
Feb 10, 2022
Merged

fix: remove node event emitters#161
achingbrain merged 4 commits intomasterfrom
fix/remove-node-event-emitters

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@achingbrain achingbrain commented Feb 9, 2022

Replaces the node EventEmitter with the pure-js EventTarget class.

All events are now instances of Event.

For typing CustomEvent can be used which gives us a typed .detail field.

Tediously EventTarget itself doesn't support typed events (yet?) and node.js doesn't support CustomEvent globally so bit of trickery was required but hopefully this can be removed in future:

import { EventEmitter, CustomEvent } from '@libp2p/interfaces'

interface EventMap {
  'foo': CustomEvent<number>
}

class MyEmitter extends EventEmitter<EventMap> {
  // ... other code here
} 

const emitter = new MyEmitter()

emitter.addEventListener('foo', (evt) => {
  const n = evt.detail // n is a 'number'
})

@achingbrain achingbrain merged commit 221fb6a into master Feb 10, 2022
@achingbrain achingbrain deleted the fix/remove-node-event-emitters branch February 10, 2022 05:43
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