Showing results for https://www.youtube.com/

This tool is an ongoing experiment in better HTML checking, and its behavior remains subject to change

Error: Content-Security-Policy HTTP header: Bad content security policy: Unrecognised directive-name: "require-trusted-types-for".
https://www.youtube.com/
Error: Attribute darker-dark-theme not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Error: Attribute darker-dark-theme-deprecate not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Error: Attribute system-icons not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Error: Attribute typography not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Error: Attribute typography-spacing not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Error: Attribute refresh not allowed on element html at this point.
From line 1, column 16; to line 1, column 192
TYPE html><html style="font-size: 10px;font-family: Roboto, Arial, sans-serif;" lang="en" darker-dark-theme darker-dark-theme-deprecate system-icons typography typography-spacing refresh><head>
Attributes for element html:
Global attributes
Info: Trailing slash on void elements has no effect and interacts badly with unquoted attribute values.
From line 1, column 671; to line 1, column 724
;</script><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta
Error: Bad value origin-trial for attribute http-equiv on element meta.
From line 1, column 725; to line 1, column 1008
IE=edge"/><meta http-equiv="origin-trial" content="ApvK67ociHgr2egd6c2ZjrfPuRs8BHcvSggogIOPQNH7GJ3cVlyJ1NOq/CO…lYXR1cmUiOiJQcml2YWN5U2FuZGJveEFkc0FQSXMiLCJleHBpcnkiOjE2OTUxNjc5OTksImlzU3ViZG9tYWluIjp0cnVlfQ=="/><scrip
Info: Trailing slash on void elements has no effect and interacts badly with unquoted attribute values.
From line 1, column 725; to line 1, column 1008
IE=edge"/><meta http-equiv="origin-trial" content="ApvK67ociHgr2egd6c2ZjrfPuRs8BHcvSggogIOPQNH7GJ3cVlyJ1NOq/CO…lYXR1cmUiOiJQcml2YWN5U2FuZGJveEFkc0FQSXMiLCJleHBpcnkiOjE2OTUxNjc5OTksImlzU3ViZG9tYWluIjp0cnVlfQ=="/><scrip
Error: Bad value handheld for attribute media on element link: The media handheld has been deprecated
From line 12, column 687; to line 12, column 755
ube.com/"><link rel="alternate" media="handheld" href="https://m.youtube.com/"><link
Error: Attribute name not allowed on element script at this point.
From line 21, column 417; to line 21, column 473
yN8_-_Ow"><script name="www-roboto" nonce="Rf6GRopvUTV6GJmoOaA41g">if (do
Attributes for element script:
Global attributes
src — Address of the resource
type — Type of script
nomodule — Prevents execution in user agents that support module scripts
async — Execute script when available, without blocking while fetching
defer — Defer script execution
crossorigin — How the element handles crossorigin requests
integrity — Integrity metadata used in Subresource Integrity checks [SRI]
referrerpolicy — Referrer policy for fetches initiated by the element
blocking — Whether the element is potentially render-blocking
fetchpriority — Sets the priority for fetches initiated by the element
Error: Attribute autocorrect not allowed on element input at this point.
From line 21, column 24279; to line 21, column 24427
ch-input"><input id="search" autocapitalize="none" autocomplete="off" autocorrect="off" hidden name="search_query" tabindex="0" type="text" spellcheck="false"></div>
Attributes for element input:
Global attributes
accept when type is file
alt when type is image
autocomplete when type is text, search, url, tel, email, password, date, month, week, time, datetime-local, number, range, or color
autofocus
checked when type is checkbox or radio
dirname when type is text or search
disabled
form
formaction when type is submit or image
formenctype when type is submit or image
formmethod when type is submit or image
formnovalidate when type is submit or image
formtarget when type is submit or image
height when type is image
list when type is text, search, url, tel, email, date, month, week, time, datetime-local, number, range, or color
max when type is date, month, week, time, datetime-local, number, or range
maxlength when type is text, search, url, tel, email, or password
min when type is date, month, week, time, datetime-local, number, or range
multiple when type is email or file
name
pattern when type is text, search, url, tel, email, or password
placeholder when type is text, search, url, tel, email, password, or number
readonly when type is text, search, url, tel, email, password, date, month, week, time, datetime-local, or number
required when type is text, search, url, tel, email, password, date, month, week, time, datetime-local, number, checkbox, radio, or file
size when type is text, search, url, tel, email, or password
src when type is image
step when type is date, month, week, time, datetime-local, number, or range
type
value when type is not file or image
width when type is image
Error: Attribute viewBox not allowed on element g at this point.
From line 21, column 24512; to line 21, column 24565
Mid meet"><g id="menu" class="yt-icons-ext" viewBox="0 0 24 24"><path
Error: Duplicate ID youtube-paths.
From line 21, column 28983; to line 21, column 29004
th="0.5"/><g id="youtube-paths"><path
Warning: The first occurrence of ID youtube-paths was here.
From line 21, column 25580; to line 21, column 25601
th="0.5"/><g id="youtube-paths"><path
Error: Attribute name not allowed on element link at this point.
From line 23, column 15; to line 23, column 210
;</script><link rel="stylesheet" href="https://www.youtube.com/s/desktop/208496d9/cssbin/www-main-desktop-watch-page-skeleton.css" name="www-main-desktop-watch-page-skeleton" nonce="YMKy6xyQyFa_GUyN8_-_Ow"><div i
Attributes for element link:
Global attributes
href — Address of the hyperlink
crossorigin — How the element handles crossorigin requests
rel — Relationship between the document containing the hyperlink and the destination resource
media — Applicable media
integrity — Integrity metadata used in Subresource Integrity checks [SRI]
hreflang — Language of the linked resource
type — Hint for the type of the referenced resource
referrerpolicy — Referrer policy for fetches initiated by the element
sizes — Sizes of the icons (for rel="icon")
imagesrcset — Images to use in different situations, e.g., high-resolution displays, small monitors, etc. (for rel="preload")
imagesizes — Image sizes for different page layouts (for rel="preload")
as — Potential destination for a preload request (for rel="preload" and rel="modulepreload")
blocking — Whether the element is potentially render-blocking
color — Color to use when customizing a site's icon (for rel="mask-icon")
disabled — Whether the link is disabled
fetchpriority — Sets the priority for fetches initiated by the element
Also, the title attribute has special semantics on this element: Title of the link; CSS style sheet set name
Error: Duplicate ID menu.
From line 23, column 3336; to line 23, column 3350
-1"></div><div id="menu"><div c
Warning: The first occurrence of ID menu was here.
From line 21, column 24512; to line 21, column 24565
Mid meet"><g id="menu" class="yt-icons-ext" viewBox="0 0 24 24"><path

There were errors.

Used the schema for HTML + SVG 1.1 + MathML 3.0 + RDFa 1.1.

Used the HTML parser. Externally specified character encoding was utf-8.

Total execution time 166 milliseconds.

Nu Html Checker

Showing results for https://www.youtube.com/