@kwiz/fluentui/src/controls/canvas/CustomEventTargetBase.ts

KWIZ common controls for FluentUI

export class CustomEventTargetBase implements EventTarget {    
    private _et: EventTarget;    

    public constructor() {
        try {
            this._et = new EventTarget();
        } catch (error) {
            // Using document as EventTarget to support iOS 13 and older.
            // Because EventTarget constructor just exists at iOS 14 and later.
            this._et = document;
        }
    }

    public addEventListener(
        type: string,
        listener: EventListenerOrEventListenerObject | null,
        options?: boolean | AddEventListenerOptions,
    ): void {
        this._et.addEventListener(type, listener, options);
    }

    public dispatchEvent(event: Event): boolean {
        return this._et.dispatchEvent(event);
    }

    public removeEventListener(
        type: string,
        callback: EventListenerOrEventListenerObject | null,
        options?: boolean | EventListenerOptions,
    ): void {
        this._et.removeEventListener(type, callback, options);
    }
}