You can wait until the body is ready:
function onReady(callback) { var intervalId = window.setInterval(function() { if (document.getElementsByTagName('body')[0] !== undefined) { window.clearInterval(intervalId); callback.call(this); } }, 1000); } function setVisible(selector, visible) { document.querySelector(selector).style.display = visible ? 'block' : 'none'; } onReady(function() { setVisible('.page', true); setVisible('#loading', false); });
body { background: #FFF url("https://i.imgur.com/KheAuef.png") top left repeat-x; font-family: 'Alex Brush', cursive !important; } .page { display: none; padding: 0 0.5em; } .page h1 { font-size: 2em; line-height: 1em; margin-top: 1.1em; font-weight: bold; } .page p { font-size: 1.5em; line-height: 1.275em; margin-top: 0.15em; } #loading { display: block; position: absolute; top: 0; left: 0; z-index: 100; width: 100vw; height: 100vh; background-color: rgba(192, 192, 192, 0.5); background-image: url("https://i.stack.imgur.com/MnyxU.gif"); background-repeat: no-repeat; background-position: center; }
<link href="https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css" rel="stylesheet"/> <link href="https://fonts.googleapis.com/css?family=Alex+Brush" rel="stylesheet"> <div class="page"> <h1>The standard Lorem Ipsum passage</h1> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p> </div> <div id="loading"></div>
Run code snippetExpand snippet
Here is a JSFiddle that demonstrates this technique.
Update
Here is a modern version using promises. The promise is completely optional now, as it is only used for a delay. The DOMContentLoaded
event will fire once the page is loaded.
const wait = (delay = 0) => new Promise(resolve => setTimeout(resolve, delay)); const setVisible = (elementOrSelector, visible) => (typeof elementOrSelector === 'string' ? document.querySelector(elementOrSelector) : elementOrSelector ).style.display = visible ? 'block' : 'none'; setVisible('.page', false); setVisible('#loading', true); document.addEventListener('DOMContentLoaded', () => wait(1000).then(() => { setVisible('.page', true); setVisible('#loading', false); }));
body { background: #FFF url("https://i.imgur.com/KheAuef.png") top left repeat-x; font-family: 'Alex Brush', cursive !important; } .page { display: none; padding: 0 0.5em; } .page h1 { font-size: 2em; line-height: 1em; margin-top: 1.1em; font-weight: bold; } .page p { font-size: 1.5em; line-height: 1.275em; margin-top: 0.15em; } #loading { display: flex; position: fixed; z-index: 100; width: 100%; height: 100%; background-color: rgba(192, 192, 192, 0.5); background-image: url("https://i.stack.imgur.com/MnyxU.gif"); background-repeat: no-repeat; background-position: center; }
<link href="https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css" rel="stylesheet"/> <link href="https://fonts.googleapis.com/css?family=Alex+Brush" rel="stylesheet"> <div class="page"> <h1>The standard Lorem Ipsum passage</h1> <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p> </div> <div id="loading"></div>