function start()

in js/reveal.js [179:244]
35 lines of code
3 McCabe index (conditional complexity)

	function start() {

		ready = true;

		// Remove slides hidden with data-visibility
		removeHiddenSlides();

		// Make sure we've got all the DOM elements we need
		setupDOM();

		// Listen to messages posted to this window
		setupPostMessage();

		// Prevent the slides from being scrolled out of view
		setupScrollPrevention();

		// Adds bindings for fullscreen mode
		setupFullscreen();

		// Resets all vertical slides so that only the first is visible
		resetVerticalSlides();

		// Updates the presentation to match the current configuration values
		configure();

		// Read the initial hash
		location.readURL();

		// Create slide backgrounds
		backgrounds.update( true );

		// Notify listeners that the presentation is ready but use a 1ms
		// timeout to ensure it's not fired synchronously after #initialize()
		setTimeout( () => {
			// Enable transitions now that we're loaded
			dom.slides.classList.remove( 'no-transition' );

			dom.wrapper.classList.add( 'ready' );

			dispatchEvent({
				type: 'ready',
				data: {
					indexh,
					indexv,
					currentSlide
				}
			});
		}, 1 );

		// Special setup and config is required when printing to PDF
		if( print.isPrintingPDF() ) {
			removeEventListeners();

			// The document needs to have loaded for the PDF layout
			// measurements to be accurate
			if( document.readyState === 'complete' ) {
				print.setupPDF();
			}
			else {
				window.addEventListener( 'load', () => {
					print.setupPDF();
				} );
			}
		}

	}