C# like event pattern for TypeScript

EventSystem.ts

export type EventHandler<T> = (event: T) => void;

export interface IEvent<T>
{
    add(handler: EventHandler<T>): void;
    remove(handler: EventHandler<T>): void;
}

export class InvokeableEvent<T> implements IEvent<T>
{
    private handlers: EventHandler<T>[] = [];

    /**
     * @param handler Method that will be called when event is invoked.
     */
    public add(handler: EventHandler<T>)
    {
        this.handlers.push(handler);
    }

    /**
     * @param handler An existing method that is called when event is invoked.
     */
    public remove(handler: EventHandler<T>)
    {
        for (let i = 0; i < this.handlers.length; i++)
        {
            if (this.handlers[i] === handler)
            {
                this.handlers.splice(i, 1);
            }
        }
    }

    /**
     * Runs all the methods that were added.
     * @param event An argument that handlers expect (Use null if none are expected).
     */
    public invoke(event: T)
    {
        for (let handler of this.handlers)
        {
            handler(event);
        }
    }
}

Example.ts

import { InvokeableEvent, IEvent } from "./EventSystem";

export class Example
{
    public static run()
    {
        let button: Button = new Button();
        button.onClicked.add(this.onButtonClicked);

        button.click();
        button.click();

        button.onClicked.remove(this.onButtonClicked);
        button.click();
    }

    private static onButtonClicked = () =>
    {
        console.log('Button has been clicked!');
    }
}

class Button
{
    public get onClicked(): IEvent<null> { return this._onClicked; }
    private _onClicked: InvokeableEvent<null> = new InvokeableEvent();

    public click()
    {
        this._onClicked.invoke(null);
    }
}

typescript.json

// Code snippet for making an event instance in VS Code
{
	"Create an event": {
		"prefix": "ent",
		"body":
		[
			"public get $1(): IEvent<$2> { return this._$1; }",
			"private _$1: InvokeableEvent<$2> = new InvokeableEvent<$2>();"
		],
		"description": "Create an event instance. Pattern source: https://gist.github.com/Quickz/f98c98ed0ede9966870fa48d6fb63e97"
	}
}