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@effection/events
Advanced tools
Helpers for working with events in Effection. These helpers work both with
Node.js style EventEmitters (on
/off
) and with browser style EventTarget
(addEventListeners
/removeEventListener
).
The once
operation can be used to wait for an event to occur exactly once.
import { main } from '@effection/main';
import { once } from '@effection/events';
main(function* sayHello() {
yield once(window, "DOMContentLoaded");
console.log('Hello World!');
});
The on
operation returns a subscription which can be used to loop over events:
import { main } from '@effection/main';
import { on } from '@effection/events';
main(function* sayHello() {
let messages = yield on(window, "message");
while(true) {
let message = yield messages.next();
console.log('Got message:', message);
}
});
It is a common pattern, primarily in Node to have an event called error
which
has an error as its first argument. @effection/events
includes a helper to
make handling this situation convenient:
import { main } from '@effection/main';
import { once, throwOnErrorEvent } from '@effection/events';
main(function* sayHello() {
let someSocket = createSocket();
yield throwOnErrorEvent(someSocket);
yield once(someSocket, "open");
let messages = yield once(someSocket, "message");
while(true) {
let message = yield messages.next();
console.log('Got message:', message);
}
});
FAQs
Helpers for listening to events with effection
The npm package @effection/events receives a total of 747 weekly downloads. As such, @effection/events popularity was classified as not popular.
We found that @effection/events demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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