A list of everything that goes in the <head> of your document
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README.md

README.md

HEAD

A collection of HTML head elements.

Elements

<title>Page Title</title>
<base href="https://example.com/page.html">
<style>
  body { color: red; }
</style>
<script src="script.js"></script>

Meta Element

<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="keywords" content="your,keywords,here,comma,separated,no,spaces">
<meta name="description" content="150 chars">
<meta name="subject" content="your website's subject">
<meta name="googlebot" content="index,follow">
<meta name="google" content="nositelinkssearchbox">
<meta name="google-site-verification" content="verification_token">
<meta name="abstract" content="">
<meta name="topic" content="">
<meta name="summary" content="">
<meta name="classification" content="business">
<meta name="url" content="https://example.com/">
<meta name="identifier-URL" content="https://example.com/">
<meta name="directory" content="submission">
<meta name="category" content="">
<meta name="coverage" content="Worldwide">
<meta name="distribution" content="Global">
<meta name="rating" content="General">
<meta name="referrer" content="never">
<meta http-equiv="Content-Security-Policy" content="default-src 'self'">

Deprecated/Legacy

Below are the meta attributes which are either deprecated or not supported anymore:

<!-- Deprecated because: Used to declare the document language, but not well supported. Better use <html lang=""> -->
<meta name="language" content="en">

<!-- Deprecated because: Ignored by search engines. Better use robots.txt or modify .htaccess -->
<meta name="robots" content="index,follow">

<!-- Deprecated because: No evidence of use in any search engines -->
<meta name="revised" content="Sunday, July 18th, 2010, 5:15 pm"> 

<!-- Deprecated because: Provides a easy way for bots to get emails from websites -->
<meta name="reply-to" content="email@example.com"> 

<!-- Deprecated because: Better to use <link rel="author"> or humans.txt file -->
<meta name="author" content="name, email@example.com">

<!-- Deprecated because: Better to use <link rel="author"> or humans.txt file -->
<meta name="designer" content="">

<!-- Deprecated because: Better to use <link rel="author"> or humans.txt file -->
<meta name="owner" content="">

<!-- Deprecated because: Telling the search bots to revisit the page after a period. This is not supported because most of the Search Engines nowadays have random intervals for recrawling a webpage -->
<meta name="revisit-after" content="7 days">

<!-- Google strongly advises not to use this. Better to set up Apache redirects instead -->
<meta http-equiv="refresh" content="300;url=https://example.com/"> 

<!-- Cache Control -->
<!-- Deprecated because: There's no point in doing cache control on client side. It is better to configure it on server side than in meta data -->
<meta http-equiv="Expires" content="0">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">

Link Element

<link rel="copyright" href="copyright.html">
<link rel="stylesheet" href="https://example.com/styles.css">
<link rel="alternate" href="https://feeds.feedburner.com/martini" type="application/rss+xml" title="RSS">
<link rel="alternate" href="https://example.com/feed.atom" type="application/atom+xml" title="Atom 0.3">
<link rel="alternate" href="https://es.example.com/" hreflang="es">
<link rel="me" href="https://google.com/profiles/thenextweb" type="text/html">
<link rel="me" href="mailto:name@example.com">
<link rel="me" href="sms:+15035550125">
<link rel="archives" href="https://example.com/2003/05/" title="May 2003">
<link rel="index" href="https://example.com/" title="DeWitt Clinton">
<link rel="start" href="https://example.com/photos/pattern_recognition_1_about/" title="Pattern Recognition 1">
<link rel="prev" href="https://example.com/opensearch/opensearch-and-openid-a-sure-way-to-get-my-attention/" title="OpenSearch and OpenID? A sure way to get my attention.">
<link rel="search" href="/open-search.xml" type="application/opensearchdescription+xml" title="Search Title">
<link rel="self" type="application/atom+xml" href="https://example.com/atomFeed.php?page=3">
<link rel="first" href="https://example.com/atomFeed.php">
<link rel="next" href="https://example.com/atomFeed.php?page=4">
<link rel="previous" href="https://example.com/atomFeed.php?page=2">
<link rel="last" href="https://example.com/atomFeed.php?page=147">
<link rel="shortlink" href="https://example.com/?p=43625">
<link rel="canonical" href="https://example.com/2010/06/9-things-to-do-before-entering-social-media.html">
<link rel="amphtml" href="https://www.example.com/url/to/amp-version.html">
<link rel="EditURI" href="https://example.com/xmlrpc.php?rsd" type="application/rsd+xml" title="RSD">
<link rel="pingback" href="https://example.com/xmlrpc.php">
<link rel="webmention" href="https://example.com/webmention">
<link rel="manifest" href="manifest.json">
<link rel="author" href="humans.txt">
<link rel="import" href="component.html">

<!-- Prefetching, preloading, prebrowsing -->
<link rel="dns-prefetch" href="//example.com/">
<link rel="preconnect" href="https://www.example.com/">
<link rel="prefetch" href="https://www.example.com/">
<link rel="prerender" href="https://example.com/">
<link rel="subresource" href="styles.css">
<link rel="preload" href="image.png">
<!-- More info: https://css-tricks.com/prefetching-preloading-prebrowsing/ -->

Deprecated/Legacy

Below are the link relations which are either deprecated or not supported anymore:

<link rel="shortcut icon" href="path/to/favicon.ico">

Favicons

<!-- For IE 10 and below -->
<!-- No link, just place a file called favicon.ico in the root directory -->

<!-- For IE 11, Chrome, Firefox, Safari, Opera -->
<link rel="icon" href="path/to/favicon-16.png" sizes="16x16" type="image/png">
<link rel="icon" href="path/to/favicon-32.png" sizes="32x32" type="image/png">
<link rel="icon" href="path/to/favicon-48.png" sizes="48x48" type="image/png">
<link rel="icon" href="path/to/favicon-62.png" sizes="62x62" type="image/png">
<!-- More info: https://bitsofco.de/all-about-favicons-and-touch-icons/ -->

Social

Facebook / Open Graph

<meta property="fb:app_id" content="123456789">
<meta property="og:url" content="https://example.com/page.html">
<meta property="og:type" content="website">
<meta property="og:title" content="Content Title">
<meta property="og:image" content="https://example.com/image.jpg">
<meta property="og:description" content="Description Here">
<meta property="og:site_name" content="Site Name">
<meta property="og:locale" content="en_US">
<meta property="article:author" content="">
<!-- Facebook: https://developers.facebook.com/docs/sharing/webmasters#markup -->
<!-- Open Graph: http://ogp.me/ -->

Twitter

<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="@site_account">
<meta name="twitter:creator" content="@individual_account">
<meta name="twitter:url" content="https://example.com/page.html">
<meta name="twitter:title" content="Content Title">
<meta name="twitter:description" content="Content description less than 200 characters">
<meta name="twitter:image" content="https://example.com/image.jpg">
<!-- More info: https://dev.twitter.com/cards/getting-started -->
<!-- Validate: https://dev.twitter.com/docs/cards/validation/validator -->

Google+ / Schema.org

<meta itemprop="name" content="Content Title">
<meta itemprop="description" content="Content description less than 200 characters">
<meta itemprop="image" content="https://example.com/image.jpg">

Browser/Platform

Apple iOS

<!-- Smart App Banner -->
<meta name="apple-itunes-app" content="app-id=APP_ID,affiliate-data=AFFILIATE_ID,app-argument=SOME_TEXT">

<!-- Disable automatic detection and formatting of possible phone numbers -->
<meta name="format-detection" content="telephone=no">

<!-- Add to Home Screen -->
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<meta name="apple-mobile-web-app-title" content="App Title">

<!-- Touch Icons -->
<link rel="apple-touch-icon" href="apple-touch-icon.png">
<link rel="apple-touch-icon-precomposed" href="apple-touch-icon-precomposed.png">
<!-- In most cases, one 180×180px touch icon in the head is enough -->
<!-- If you use art-direction and/or want to have different content for each device, you can add more touch icons -->

<!-- Startup Image -->
<link rel="apple-touch-startup-image" href="startup.png">

<!-- More info: https://developer.apple.com/safari/library/documentation/appleapplications/reference/safarihtmlref/articles/metatags.html -->

Apple Safari

<!-- Pinned Site -->
<link rel="mask-icon" href="icon.svg" color="red">

Google Android

<meta name="theme-color" content="#E64545">

<!-- Add to homescreen -->
<meta name="mobile-web-app-capable" content="yes">
<!-- More info: https://developer.chrome.com/multidevice/android/installtohomescreen -->

Google Chrome

<link rel="chrome-webstore-item" href="https://chrome.google.com/webstore/detail/APP_ID">

<!-- Disable translation prompt -->
<meta name="google" value="notranslate">

Microsoft Internet Explorer

<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="cleartype" content="on">
<meta name="skype_toolbar" content="skype_toolbar_parser_compatible">

<!-- Pinned Site -->
<!-- IE 10 / Windows 8 -->
<meta name="msapplication-TileImage" content="pinned-tile-144.png">
<meta name="msapplication-TileColor" content="#009900">
<!-- IE 11 / Windows 9.1 -->
<meta name="msapplication-config" content="ieconfig.xml">

Microsoft Internet Explorer (LEGACY DO NOT USE)

<!-- Legacy Tags (DO NOT USE) -->
<meta name="mssmarttagspreventparsing" content="true">
<meta http-equiv="page-enter" content="revealtrans(duration=2,transition=2)">
<meta http-equiv="page-exit" content="revealtrans(duration=3,transition=12)">

360 Browser

<!-- select rendering engine in order -->
<meta name="renderer" content="webkit|ie-comp|ie-stand">

UC Mobile Browser

<!-- Locks the screen into the specified orientation -->
<meta name="screen-orientation" content="landscape/portrait">
<!-- Display this page in fullscreen -->
<meta name="full-screen" content="yes">
<!-- UC browser will display images even if in "text mode" -->
<meta name="imagemode" content="force">
<!-- Page will be displayed in "application mode"(fullsreen,forbiding gesture, etc.) -->
<meta name="browsermode" content="application">
<!-- Disabled the UC browser's "night mode" in this page -->
<meta name="nightmode" content="disable">
<!-- Simplify the page to reduce data transfer -->
<meta name="layoutmode" content="fitscreen">
<!-- Disable the UC browser's feature of "scaling font up when there are many words in this page" -->
<meta name="wap-font-scale" content="no">

QQ Mobile Browser

<!-- Locks the screen into the specified orientation -->
<meta name="x5-orientation" content="landscape/portrait">
<!-- Display this page in fullscreen -->
<meta name="x5-fullscreen" content="true">
<!-- Page will be displayed in "application mode"(fullsreen,etc.) -->
<meta name="x5-page-mode" content="app">

App Links

<!-- iOS -->
<meta property="al:ios:url" content="applinks://docs">
<meta property="al:ios:app_store_id" content="12345">
<meta property="al:ios:app_name" content="App Links">
<!-- Android -->
<meta property="al:android:url" content="applinks://docs">
<meta property="al:android:app_name" content="App Links">
<meta property="al:android:package" content="org.applinks">
<!-- Web Fallback -->
<meta property="al:web:url" content="http://applinks.org/documentation">
<!-- More info: http://applinks.org/documentation/ -->

Other Resources

Contributing

Open an issue or a pull request to suggest changes or additions.

Author

Josh Buchea

License

MIT License