function checkCapabilities()

in js/reveal.js [293:320]
18 lines of code
11 McCabe index (conditional complexity)

	function checkCapabilities() {

		features.transforms3d = 'WebkitPerspective' in document.body.style ||
								'MozPerspective' in document.body.style ||
								'msPerspective' in document.body.style ||
								'OPerspective' in document.body.style ||
								'perspective' in document.body.style;

		features.transforms2d = 'WebkitTransform' in document.body.style ||
								'MozTransform' in document.body.style ||
								'msTransform' in document.body.style ||
								'OTransform' in document.body.style ||
								'transform' in document.body.style;

		features.requestAnimationFrameMethod = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame;
		features.requestAnimationFrame = typeof features.requestAnimationFrameMethod === 'function';

		features.canvas = !!document.createElement( 'canvas' ).getContext;

		features.touch = !!( 'ontouchstart' in window );

		// Transitions in the overview are disabled in desktop and
		// mobile Safari due to lag
		features.overviewTransitions = !/Version\/[\d\.]+.*Safari/.test( navigator.userAgent );

		isMobileDevice = /(iphone|ipod|ipad|android)/gi.test( navigator.userAgent );

	}