6f2a4488e8
* cleanup * add context * EventEmitter allows removal of toolbar props from extensions * Move to 'packages' of extensions Remove EmojiTrigger extension * types * iteration * fix render flashing * fix: Missing nodes in collection descriptions
30 lines
734 B
TypeScript
30 lines
734 B
TypeScript
/**
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* A tiny EventEmitter implementation for the browser.
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*/
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export default class EventEmitter {
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private listeners: { [name: string]: ((data: any) => unknown)[] } = {};
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public addListener(name: string, callback: (data: any) => unknown) {
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if (!this.listeners[name]) {
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this.listeners[name] = [];
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}
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this.listeners[name].push(callback);
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}
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public removeListener(name: string, callback: (data: any) => unknown) {
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this.listeners[name] = this.listeners[name]?.filter(
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(cb) => cb !== callback
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);
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}
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public on = this.addListener;
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public off = this.removeListener;
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public emit(name: string, data?: any) {
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this.listeners[name]?.forEach((callback) => {
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callback(data);
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});
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}
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}
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