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example-invalid.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>
<!-- FONTS. -->
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Pangolin" />
<!-- STYLES. -->
<link rel="stylesheet" href="./css/sanitize.css" />
<link rel="stylesheet" href="./css/construct.css" />
<link rel="stylesheet" href="./css/construct.boxes.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" />
</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: none">
<p>
Hidden content, with <code>style="display: none"</code>.
</p>
</div>
<hr />
<p>
Iframe without <code>title</code>.
</p>
<p>
<iframe src="https://example.com/"></iframe>
</p>
<hr />
<p>
Image without <code>alt</code>.
</p>
<p>
<img src="https://picsum.photos/900/100" />
</p>
<hr />
<p>
The <code>figcaption</code> not first/last child of <code>figure</code>.
</p>
<figure>
<img
alt="Example image"
src="https://picsum.photos/900/100"
/>
<figcaption>
Image description
</figcaption>
<p>
(This paragraph is <code>:last-child</code>.)
</p>
</figure>
<hr />
<p>
More than one <code>figcaption</code> per <code>figure</code>. Image with missing <code>src</code>.
</p>
<figure>
<figcaption>
Image description
</figcaption>
<img
alt="(Image source omitted)"
height="100"
/>
<figcaption>
Image description
</figcaption>
</figure>
<hr />
<p>
Caption is not a child of figure.
</p>
<figcaption>
This <code>figcaption</code> lacks a <code>figure</code> parent.
</figcaption>
<hr />
<p>
External link to non-HTTPS site.
<p>
<p>
<a href="http://example.com/">
Example link
</a>
</p>
<hr />
<p>
Link with <code>target="_blank"</code> that lacks <code>rel="noopener noreferrer"</code>.
</p>
<p>
<a href="https://example.com/" target="_blank">
Example link
</a>
</p>
<hr />
<p>
Invalid child of <code>ol</code>.
</p>
<ol>
<li>
<p>
Valid item within list.
</p>
</li>
<p>
Invalid item within list.
</p>
</ol>
<hr />
<p>
Invalid child of <code>ul</code>.
</p>
<ul>
<li>
<p>
Valid item within list.
</p>
</li>
<p>
Invalid item within list.
</p>
</ul>
<hr />
<li>
<code>li</code> without parent <code>ol</code> or <code>ul</code>.
</li>
<br />
<hr />
<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 onsubmit="return false">
<fieldset>
<legend>
Radios without <code>name="…"</code>
</legend>
<p>
<label for="RADIO_ID_1">
<input
type="radio"
id="RADIO_ID_1"
/>
Label for radio 1
</label>
</p>
<p>
<label for="RADIO_ID_2">
<input
type="radio"
id="RADIO_ID_2"
/>
Label for radio 2
</label>
</p>
</fieldset>
<fieldset>
<legend>
Checkboxes with/without nesting
</legend>
<p>
<label for="CHECKBOX_ID_1">
<input
type="checkbox"
id="CHECKBOX_ID_1"
/>
Label for checkbox 1
</label>
</p>
<p>
<input
type="checkbox"
id="CHECKBOX_ID_2"
/>
<label for="CHECKBOX_ID_2">
Label for checkbox 2 (not nested)
</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>
<input
id="INPUT_TEXT_ID_1"
type="text"
/>
</p>
<p>
<label for="INPUT_TEXT_ID_2">
This <code>input</code> lacks <code>id="…"</code>
</label>
<input
type="text"
/>
</p>
</fieldset>
<p>
<button>
Button without <code>type="…"</code>
</button>
</p>
</form>
<hr />
<table role="presentation">
<tr>
<td>
Table with <code>role="presentation"</code>
</td>
</tr>
</table>
<hr />
<table>
<tr>
<td>
<table>
<tr>
<td>
Table nested inside another <code>table</code>
</td>
</tr>
</table>
</td>
</tr>
</table>
<hr />
<p>
Table with invalid <code>col</code> values.
</p>
<table>
<thead>
<tr>
<th>
</th>
<th scope="INVALID">
Uno
</th>
<th scope="col">
Dos
</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row">
Foo:
</th>
<td>
Value 1
</td>
<td>
Value 2
</td>
</tr>
<tr>
<th scope="INVALID">
Foo:
</th>
<td>
Value 1
</td>
<td>
Value 2
</td>
</tr>
</tbody>
</table>
<hr />
<p>
Empty <code>div</code>.
<p>
<div></div>
<hr />
<span>
<div>
Improperly nested <code>div</code>, inside <code>span</code>.
</div>
</span>
<hr />
<p>
<div>
Improperly nested <code>div</code>, inside <code>p</code>.
</div>
</p>
<hr />
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p>
Needless nesting of <code>div</code> tags.
</p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>