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no_empty_iframes_testpage.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="description" content="ShadowFox is a universal dark theme for Firefox.">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="index.css">
<title>ShadowFox</title>
<link rel="apple-touch-icon" sizes="180x180" href="resources/favicons/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="resources/favicons/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="resources/favicons/favicon-16x16.png">
<link rel="manifest" href="resources/favicons/site.webmanifest">
<link rel="mask-icon" href="resources/favicons/safari-pinned-tab.svg" color="#9440c1">
<link rel="shortcut icon" href="resources/favicons/favicon.ico">
<meta name="msapplication-TileColor" content="#9440c1">
<meta name="msapplication-config" content="resources/favicons/browserconfig.xml">
<meta name="theme-color" content="#ffffff">
</head>
<style>
iframe {
background-color: #5e7651;
border: none;
}
.ion-ios-home {
padding: 10px 0 0 10px;
font-size: 250%;
}
section {
padding: 0 0 80px 0;
}
.CodeMirror {
max-width: 70%;
margin-left: 15%;
}
</style>
<body>
<div class="row">
<a href="."><i class="ion-ios-home icon-big"></i></a>
</div>
<section>
<div class="row">
<h2>No Empty iframes</h2><br>
<p class="long-copy">
ShadowFox styles <code>about:blank</code> in order to maintain a universal dark theme. An unfortunate consequence of this is that empty iframes on webpages are unintentionally styled (see <a href="https://github.com/overdodactyl/ShadowFox/issues/222">here</a>). No Empty iframes is a simple extension available on <a href="https://addons.mozilla.org/en-US/firefox/addon/no-empty-iframes/">AMO</a> that solves this problem by adding a content-less <code>div</code> to the body of any empty <code>iframe</code>.<br><br>
Below is a simple test for No Empty iframes. The first iframe has no content, and the second does. Both iframes should have a green background, but with just ShadowFox installed, you will notice the first is grey.<br><br>
<b>With No Empty iframes installed (or ShadowFox uninstalled), both boxes should be green.</b> <br><br><br>
</p>
<center>
<iframe id="iframe_empty" src="about:blank"></iframe>
<iframe id="iframe_content" src="about:blank"></iframe>
</center>
</div>
</section>
<section>
<div class="row">
<h2>Alternatives</h2>
<p class="long-copy">
No Empty iframes is very simple extension, and the following code could be easily be applied via an extension like <a href="https://addons.mozilla.org/en-US/firefox/addon/violentmonkey/">Violentmonkey</a>.<br><br><br>
</p>
<textarea class="codemirror-textarea" id="iframes_test">// ==UserScript==
// @name No Empty iframes
// @grant none
// ==/UserScript==
window.onload = function () {
var frames = document.getElementsByTagName("iframe");
for (var i = 0; i < frames.length; i++) {
var doc = frames[i].contentWindow.document;
var elemDiv = document.createElement('div');
doc.body.appendChild(elemDiv);
}
}
</textarea>
</div>
</section>
<footer>
<div class="row">
<div class="col span-1-of-2">
<ul class="footer-nav">
<li><a href="https://addons.mozilla.org/en-US/firefox/addon/no-empty-iframes/">Download No Empty iframes</a></li>
</ul>
</div>
<div class="col span-1-of-2">
<ul class="social-links">
<li><a href="https://github.com/overdodactyl/ShadowFox/"><i class="ion-social-github"></i></a></li>
<li><a href="https://www.reddit.com/r/ShadowFoxCSS/"><i class="ion-social-reddit"></i></a></li>
<li><a href="https://join.slack.com/t/shadowfox-workspace/shared_invite/enQtMzI5Nzk5OTk1MjcxLThkMDgwOGE5ZDY1MDUyNjIwNWQ2MTlmMjEwZTJiZmZjYTUxODM4ZTRkNzhiNGRhZTFhMjdjMTFjMTQ3YjZjYzU"><i class="ion-pound"></i></a></li>
</ul>
</div>
</div>
<div class="row">
<p>
Copyright Pat Johnson © 2018 (MIT). All rights reserved.<br /> Firefox is a registered trademark of the Mozilla Foundation.<br />
</p>
</div>
</footer>
<script src="resources/js/testpage.js"></script>
</body>
</html>