Method bind

js/controllers/touch.js:34–57

*

()

	 *
	 */
	bind() {

		let revealElement = this.Reveal.getRevealElement();

		if( 'onpointerdown' in window ) {
			// Use W3C pointer events
			revealElement.addEventListener( 'pointerdown', this.onPointerDown, false );
			revealElement.addEventListener( 'pointermove', this.onPointerMove, false );
			revealElement.addEventListener( 'pointerup', this.onPointerUp, false );
		}
		else if( window.navigator.msPointerEnabled ) {
			// IE 10 uses prefixed version of pointer events
			revealElement.addEventListener( 'MSPointerDown', this.onPointerDown, false );
			revealElement.addEventListener( 'MSPointerMove', this.onPointerMove, false );
			revealElement.addEventListener( 'MSPointerUp', this.onPointerUp, false );
		}
		else {
			// Fall back to touch events
			revealElement.addEventListener( 'touchstart', this.onTouchStart, false );
			revealElement.addEventListener( 'touchmove', this.onTouchMove, false );
			revealElement.addEventListener( 'touchend', this.onTouchEnd, false );
		}

	}

	/**
	 *