connect( element ) {

		super.connect( element );

		window.addEventListener( 'keydown', this._onKeyDown );
		window.addEventListener( 'keyup', this._onKeyUp );

		this.domElement.addEventListener( 'pointermove', this._onPointerMove );
		this.domElement.addEventListener( 'pointerdown', this._onPointerDown );
		this.domElement.addEventListener( 'pointerup', this._onPointerUp );
		this.domElement.addEventListener( 'contextmenu', this._onContextMenu );

	}
Whether the mouse is pressed down or not.

@type {boolean}
@readonly
@default false