Js/ts bottom implementation double click event

    private dbclick = (() => {
    
        let timer: number | null = null;

        //  In fact, double click the function below to create an image immediately , Otherwise, wait 0.3S Show it again 
        return (e: MouseEvent) => {
    
            if (timer === null) {
    
                timer = window.setTimeout(() => {
    
                    timer = null;
                }, 300);
            } else {
    
                window.clearTimeout(timer);
                timer = null;
                //  Double click the action you want to perform ......
            }
        };
    })();