| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100 | <!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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