connect( element ) {

		if ( element === undefined ) {

			console.warn( 'THREE.Controls: connect() now requires an element.' ); // @deprecated, the warning can be removed with r185
			return;

		}

		if ( this.domElement !== null ) this.disconnect();

		this.domElement = element;

	}
Connects the controls to the DOM. This method has so called "side effects" since
it adds the module's event listeners to the DOM.

@param {HTMLDOMElement} element - The DOM element to connect to.