.addListeners();
            }

            static addListeners() {
                window.addEventListener('pointermove', this.onPointerMove);
            }

            // Event handlers

            static onPointerMove = ({ clientX, clientY }) => {
                if (!this.enabled) {
                    return;
                }

                this.mouse.x = (clientX / document.documentElement.clientWidth) * 2 - 1;
                this.mouse.y = 1 - (clientY / document.documentElement.clientHeight) *