| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104 | <!doctype html><html lang="en">	<head>		<meta charset="utf-8">		<title>reveal.js - Test Iframe Backgrounds</title>		<link rel="stylesheet" href="../css/reveal.css">		<link rel="stylesheet" href="qunit-2.5.0.css">	</head>	<body style="overflow: auto;">		<div id="qunit"></div>		<div id="qunit-fixture"></div>		<div class="reveal" style="display: none;">			<div class="slides">				<section data-background-iframe="#1">1</section>				<section data-background-iframe="#2">2</section>				<section data-background-iframe="#3" data-preload>3</section>				<section data-background-iframe="#4">4</section>				<section data-background-iframe="#5">5</section>				<section data-background-iframe="#6">6</section>			</div>		</div>		<script src="../js/reveal.js"></script>		<script src="qunit-2.5.0.js"></script>		<script>			Reveal.addEventListener( 'ready', function() {				function getIframe( index ) {					return document.querySelectorAll( '.slide-background' )[index].querySelector( 'iframe' );				}				QUnit.module( 'Iframe' );				QUnit.test( 'Using default settings', function( assert ) {					Reveal.slide(0);					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), false, 'not preloaded when within viewDistance' );					Reveal.slide(1);					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), true, 'loaded when slide becomes visible' );					Reveal.slide(0);					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), false, 'unloaded when slide becomes invisible' );				});				QUnit.test( 'Using data-preload', function( assert ) {					Reveal.slide(1);					assert.strictEqual( getIframe(2).hasAttribute( 'src' ), true, 'preloaded within viewDistance' );					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), true, 'loaded when slide becomes visible' );					Reveal.slide(0);					assert.strictEqual( getIframe(3).hasAttribute( 'src' ), false, 'unloads outside of viewDistance' );				});				QUnit.test( 'Using preloadIframes: true', function( assert ) {					Reveal.configure({ preloadIframes: true });					Reveal.slide(1);					assert.strictEqual( getIframe(0).hasAttribute( 'src' ), true, 'preloaded within viewDistance' );					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), true, 'preloaded within viewDistance' );					assert.strictEqual( getIframe(2).hasAttribute( 'src' ), true, 'preloaded within viewDistance' );				});				QUnit.test( 'Using preloadIframes: false', function( assert ) {					Reveal.configure({ preloadIframes: false });					Reveal.slide(0);					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), false, 'not preloaded within viewDistance' );					assert.strictEqual( getIframe(2).hasAttribute( 'src' ), false, 'not preloaded within viewDistance' );					Reveal.slide(1);					assert.strictEqual( getIframe(1).hasAttribute( 'src' ), true, 'loaded when slide becomes visible' );				});			} );			Reveal.initialize({				viewDistance: 3			});		</script>	</body></html>
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