Add Callback type
Adds a reusable Callback type that is applied to emitter.ts for improved readability/simplicity.
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import { Callback } from "./types"
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export interface Disposable {
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dispose(): void
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}
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export interface Event<T> {
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(listener: (value: T) => void): Disposable
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(listener: Callback<T>): Disposable
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}
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/**
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* Emitter typecasts for a single event type.
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*/
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export class Emitter<T> {
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private listeners: Array<(value: T) => void> = []
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private listeners: Array<Callback<T>> = []
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public get event(): Event<T> {
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return (cb: (value: T) => void): Disposable => {
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return (cb: Callback<T>): Disposable => {
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this.listeners.push(cb)
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return {
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src/common/types.ts
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1
src/common/types.ts
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@ -0,0 +1 @@
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export type Callback<T, R = void> = (t: T) => R
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