Method isWheelUpEvent

src/AutoNumericHelper.js:791–797

* Return `true` if the given event is a wheelup event * * @param {WheelEvent} wheelEvent * @returns {boolean}

(wheelEvent)

     * @returns {boolean}
     */
    static isWheelUpEvent(wheelEvent) {
        if (!this.isWheelEvent(wheelEvent) || this.isUndefinedOrNullOrEmpty(wheelEvent.deltaY)) {
            this.throwError(`The event passed as a parameter is not a valid wheel event, '${wheelEvent.type}' given.`);
        }

        return wheelEvent.deltaY < 0;
    }

    /**
     * Return `true` if the given event is a wheeldown event