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index.html
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<!doctype html>
<html>
<head>
<meta http-equiv="x-ua-compatible" content="ie=edge" />
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1" />
<title></title>
<meta charset="utf-8" />
<style>
body {
padding: 16px;
}
</style>
<!-- FONTS. -->
<!-- STYLES. -->
<link rel="stylesheet" href="./css/level2.css" />
<!-- One `style` tag is okay. -->
<style></style>
<!-- More `style` tags get flagged. -->
<style></style>
<!-- Add `async` to external `script`. -->
<script src=""></script>
<!-- Add `async` to external `script`. -->
<script src="./does/not/exist"></script>
<!-- Insecure external `script`. -->
<script src="http://example.com/does/not/exist" async="async"></script>
<!-- Insecure external `link`. -->
<link href="http://example.com/does/not/exist" />
<script async="async"> </script>
<meta charset="utf-8" />
<style> </style>
</head>
<body style="font-family: inherit">
<!-- Inline `script` tag. -->
<script></script>
<!-- `link` not allowed within `body`. -->
<link />
<!-- `link` not allowed within `body`. -->
<link href="./does/not/exist" />
<!-- `style` not allowed within `body`. -->
<style></style>
<h1 style="font-family: inherit">
Invalid HTML Examples
</h1>
<hr />
<p>
Missing <code>title</code> attribute in <code>abbr</code>.
</p>
<blockquote>
<p>
The <abbr>USA</abbr> is a country in North America.
</p>
</blockquote>
<hr />
<div style="display: block">
<p>inline <code>[style="…"]</code> detected</p>
</div>
<hr />
<!-- Img -->
<h3>Img</h3>
<p><img src="https://bookcover.yuewen.com/qdbimg/349573/1015609210/180" alt="img" /></p>
<p><img src="https://bookcover.yuewen.com/qdbimg/349573/1015609210/180" height="240" width="180" /></p>
<p><img alt="(Image source omitted)" alt="img" height="240" width="180" /></p>
<!-- Figure -->
<h3>Figure</h3>
<p>
The <code>figcaption</code> not first/last child of <code>figure</code>.
</p>
<figure>
<img alt="Example image" src="https://bookcover.yuewen.com/qdbimg/349573/1015609210/180" height="240"
width="180" />
<figcaption>
Image description
</figcaption>
<p>
(This paragraph is <code>:last-child</code>.)
</p>
</figure>
<p>
More than one <code>figcaption</code> per <code>figure</code>
</p>
<figure>
<figcaption>
Image description
</figcaption>
<img src="https://bookcover.yuewen.com/qdbimg/349573/1015609210/180" height="240" width="180"
alt="book cover" />
<figcaption>
Image description
</figcaption>
</figure>
<p>Caption is not a child of figure.</p>
<figcaption>
This <code>figcaption</code> lacks a <code>figure</code> parent.
</figcaption>
<hr />
<!-- link -->
<h3>Link</h3>
<p>
<a href="http://example.com/" title="Example">
External link to non-HTTPS site.
</a>
</p>
<p>
<a href="https://example.com/">
Example link without title
</a>
</p>
<p>
<a href="https://example.com/" title="">
Example link with empty title
</a>
</p>
<p>Link with <code>target="_blank"</code> that lacks <code>rel="noopener noreferrer"</code>.</p>
<p>
<a href="https://example.com/" title="Example" target="_blank">
Example link
</a>
</p>
<hr />
<!-- List -->
<h3>List</h3>
<p>
Invalid child of <code>list</code>.
</p>
<ol>
<li>
<p>
Valid item within list.
</p>
</li>
<p>
Invalid item within list.
</p>
</ol>
<ul>
<li>
<p>
Valid item within list.
</p>
</li>
<p>
Invalid item within list.
</p>
</ul>
<li>
<code>li</code> without parent <code>ol</code> or <code>ul</code>.
</li>
<hr />
<!-- Dl -->
<dl>
<dt>hello </dt>
<dd>there</dd>
</dl>
<h3>DL</h3>
<dl>
<dd>
<code>dd</code> - Definition list: Definition
</dd>
<dt>
<code>dt</code> - Definition list: Term
</dt>
<dd>
<code>dd</code> - Definition list: Definition
</dd>
<p>
Invalid item within list.
</p>
</dl>
<dl>
<div>
<dd>
<code>dd</code> - Definition list: Definition
</dd>
<dt>
<code>dt</code> - Definition list: Term
</dt>
<dd>
<code>dd</code> - Definition list: Definition
</dd>
<p>
Invalid item within list.
</p>
</div>
</dl>
<div>
<dt>
<code>dt</code> without correct parent.
</dt>
<dd>
<code>dd</code> without correct parent.
</dd>
</div>
<dt>
<code>dt</code> without correct parent.
</dt>
<dd>
<code>dd</code> without correct parent.
</dd>
<hr />
<!-- Form -->
<h3>Form</h3>
<form onsubmit="return false">
<fieldset>
<legend>
Radios without <code>name="…"</code>
</legend>
<p>
<label for="RADIO_ID_1">
<input type="radio" id="RADIO_ID_1" />
'Radios without name="…"'
</label>
</p>
<p>
<label for="RADIO_ID_2">
<input type="radio" id="RADIO_ID_2" />
'Radios without name="…"'
</label>
</p>
</fieldset>
<fieldset>
<p>
This paragraph is <code>:first-child</code>.
</p>
<legend>
This legend is not <code>:first-child</code>.
</legend>
<p>
<label>
This <code>label</code> lacks <code>for="…"</code>
</label>
</p>
<p>
<label for="">
This <code>label</code> for <code>for=""</code> should not be empty
</label>
</p>
<p>
This <code>input</code> lacks <code>type="…"</code>
<input />
</p>
<p>
<button>
Button without <code>type="…"</code>
</button>
</p>
</fieldset>
</form>
<hr />
<!-- Eelemen -->
<h3>Eelement</h3>
<span>
<div>
Improperly nested <code>div</code>, inside <code>span</code>.
</div>
</span>
<p>
<div>
Improperly nested <code>div</code>, inside <code>p</code>.
</div>
</p>
<style>
.nesting,
.nesting div {
padding: 8px;
}
</style>
<div class="nesting">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p>
Needless nesting of <code>div</code> tags cannot exceed 3 levels.
</p>
</div>
</div>
</div>
</div>
<p>hello world</p>
</div>
</div>
</div>
</div>
</div>
</body>
</html>