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							- <!doctype html>
 - <html lang="en">
 - 
 - 	<head>
 - 		<meta charset="utf-8">
 - 
 - 		<title>reveal.js - Test Iframe Backgrounds</title>
 - 
 - 		<link rel="stylesheet" href="../dist/reveal.css">
 - 		<link rel="stylesheet" href="../node_modules/qunit/qunit/qunit.css">
 - 		<script src="../node_modules/qunit/qunit/qunit.js"></script>
 - 	</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="https://revealjs.com">1</section>
 - 				<section data-background-iframe="https://revealjs.com">2</section>
 - 				<section data-background-iframe="https://revealjs.com" data-preload>3</section>
 - 				<section data-background-iframe="https://revealjs.com">4</section>
 - 				<section data-background-iframe="https://revealjs.com">5</section>
 - 				<section data-background-iframe="https://revealjs.com">6</section>
 - 
 - 			</div>
 - 
 - 		</div>
 - 
 - 		<script src="../dist/reveal.js"></script>
 - 		<script>
 - 
 - 			QUnit.config.testTimeout = 30000;
 - 
 - 			Reveal.initialize({ viewDistance: 3 }).then( () => {
 - 
 - 				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' );
 - 
 - 
 - 				});
 - 
 - 			} );
 - 		</script>
 - 
 - 	</body>
 - </html>
 
 
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