EventEmitter | /deps.ts | pagic@v1.5.1

method EventEmitter.prototype.once

import { EventEmitter } from "https://deno.land/x/pagic@v1.5.1/deps.ts";

once<K extends keyof E>(eventName: K, listener: (...args: E[K]) => void): this

Adds a one-time listener function for the event named eventName. The next time eventName is emitted, listener is called and then removed. If no listener is passed, it returns a Promise that will resolve once eventName is emitted.

once<K extends keyof E>(eventName: K): Promise<E[K]>

Type Parameters

K extends keyof E

Parameters

eventName: K

listener: (...args: E[K]) => void

Returns

this

Type Parameters

K extends keyof E

Parameters

eventName: K

Returns

Promise<E[K]>