Navigation popups is an opt-in Wikipedia feature (gadget) that offers easy access to article previews and several Wikipedia functions in popup windows which appear when you hover the cursor over links. It should not be confused with the default Page Previews and Reference Tooltips, which are more reader-focused popups seen by all anonymous and new users.

• Installation: Enter Special:Preferences and click "Gadgets"; under the "Browsing" section, check the box to enable "Navigation popups: article previews and editing functions pop up when hovering over links", then click save. Follow the instructions on the page to bypass your browser's cache.

If you're having trouble, you may like to peruse some frequently asked questions.

• Mouseover tooltips on articles (including user pages):
  • Preview the first part of the article text when mousing over a link to an article
  • Preview the first image in the article
    • If there is an infobox with an image, and it is not a Wikidata-powered infobox, the image in the infobox will be taken as the first image.
    • The image shown in the preview can be controlled by adding an image hint to the article, in the form of an invisible HTML comment: <!-- popup [[File:Desired_Preview_Image.jpg]] -->.
  • Preview selected user information [user/user talk namespace]: pronoun preference, user groups, edit count, account registration date, date of most recent edit
  • Preview selected page information: size, number of links, number of images, number of categories and page age
  • Tells you about redirects, stubs and disambiguation pages
  • One click access to edit page, page history, most recent edit, edits by most recent contributor,^[a] changes since my edit,^[a] move page, what links here, related changes, watch or unwatch, protect or unprotect (for administrators), talk page, edit talk page and start new topic in talk page
  • See the Wikidata QID for the target page, if one exists
• Mouseover on image links:
  • Preview images
  • Preview file descriptions
  • Preview file links
  • Tells you if the image is on Commons
• Mouseover on user links:
  • One-click access to user page, user space, user talk, edit user talk, new section in user talk, e-mail user, contributions and contributions tree, (for administrators) deleted user contributions, user log, (for administrators) block user, edit counter (User Analysis Tool), block log
• Mouseover on footnotes:
  • Preview contents of footnotes
• Mouseover on any wikilink:
  • Clear pop-up cache^[b]
  • Enable/disable previews^[b]
  • Enable/disable pop-ups^[b]
• Preview diffs and access both revisions in watchlist, history and related changes
• Preview selected wikilinks when editing (use the mouse to select one wikilink)
• One-click revert of vandalism from history browser (see image)
• Shortcut keys (optional)
• Automatically fix links to bypass redirects and disambiguation pages (optional)
• Should work on all Wikimedia wikis

You must have a user account to install and use the Navigation popups feature. If you do not have an account, you will need to create one and log in.

• Go to Preferences → Gadgets → Browsing → Navigation popups: article previews and editing functions pop up when hovering over links

Add the following to your user script file (common.js or global.js):

mw.loader.load('https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups'); // [[w:Wikipedia:Tools/Navigation popups]]

After saving the page, clear your browser's cache (on Internet Explorer Ctrl+F5; on Mozilla Firefox ⇧ Shift+Ctrl+R; on Opera F5). Assuming that you have not disabled JavaScript in your browser, a popup should appear whenever you hover your mouse over an internal link in Wikipedia. If you use more than one web browser, or more than one PC, you may need to clear the caches for each so that the popup appears.

To install the script on the Commons or Wiktionary, repeat this procedure on those wikis.

To uninstall the script, delete the above lines from the same page and clear your browser's cache.

This tool generates "popup hints" when you hover the mouse pointer over active links and images. These popups provide information about the link's target and give quick access to a number of relevant actions.

If you hold the shift key then you can drag the popup around.

Popups depend on the type of link:

• Links to ordinary articles: popup provides a preview of the first paragraph and image of the article; the Actions menu allows to view the History and Talk page of the article, to edit and watch the article etc.
• In the edit box: Highlight a [[wiki link]] to get an article popup.
• Diff links: On history or watchlist pages, hover over diff links like "(cur)" or "(prev)" to get a summary of the difference; the Actions menu allows you to revert or undo the edit.
• User: links: information about the status of the user; User menu gives access to Talk page, recent contributions etc.
• Image links: information from image's description page
• In popups: most of the links in popup windows will open new popups when hovered over.

There are dozens of configurable settings that add or remove various powerful features, explained in depth below.

There are seven built-in style variations: shortmenus (default), menus, lite, original, nostalgia, fancy, fancy2.

• To change your selection, see the two popupStructure bits in the #Options just below.
• For more specific details on each, see /Structure examples.

• 
  Shortmenus (default)
• 
  Menus
• 
  Lite
• 
  Original
• 
  Nostalgia
• 
  Fancy
• 
  Fancy2

By editing your user CSS file, you can change the appearance of the popups. Your user CSS file has exactly the same name as the JavaScript file, but with "css" instead of "js" at the end. So you should edit your current skin's .css page.

Here is an example that makes the text a bit bigger.

.navpopup {font-size: 0.875em !important;}
.popup_menu {margin-top: 1.1em !important;}

Here is an example which gives an orange-flavoured popup with a border and changes the font used. This makes the popups look pretty silly, but it shows the sort of thing you can do if you feel like it.

.navpopup { 
  background-color: #FFBE20  !important;
  font-family:      serif    !important;
  color:            #404     !important;
  font-size:        medium   !important;
}

There are some options that you can set. To do so, edit your user JavaScript file and add a line of the form window.option = value; where option and value are chosen from the table below. For example, to turn on extensive menus and turn on admin links, you need to add something like this in your JavaScript file:

window.popupStructure = 'menus';
window.popupAdminLinks = true;

More options may be added, and requests for more configurability are welcome.

You can define custom filters for articles. These are JavaScript functions which are run after the page statistics are generated, and their output is appended (as HTML) to that part of the popup. (Note that if simplePopups is true or popupSummaryData is false, then nothing will be displayed.)

The way to set this up is to write a filter function which accepts a string (the wikitext of the article) as input, and returns a fragment of HTML. Repeat for as many filters as you want, and then create an array extraPopupFilters which contains all of the functions, in the order in which you want them to be run.

For example, let's say you want to be told whenever the wikitext of an article contains a table written using HTML tags rather than wiki markup. One way to do this is to add the following to your user JavaScript file:

// initialize the array - only do this once
window.extraPopupFilters = [];

// define the function
function popupFilterHtmlTable (wikiText) {
  if (/<table/i.test(wikiText)) return '&lt;table&gt;';
  else return '';
};

// add the function to the array (you can repeat this for lots of functions)
extraPopupFilters.push(popupFilterHtmlTable);

Then when a popup is generated for a page containing an HTML table, you should see <table> in the popup. (It may also appear for other pages, such as this page. Correcting this defect is left as an exercise for the reader.)

If you want to enable popupRedlinkRemoval, popupFixRedirs and popupFixDabs features in all pages except the special ones, histories and previews (where those features are obviously useless) you can add these lines to your user JavaScript file:

// Normally features are enabled
var toFix = true;

// In special pages, histories and previews disable them
if ( mw.config.get( 'wgCanonicalNamespace' ) === 'Special' ||
	$.inArray( mw.util.getParamValue( 'action' ), [ 'history', 'submit' ] ) !== -1 )
{
	toFix = false;
}
// 
window.popupRedlinkRemoval = toFix;
window.popupFixRedirs = toFix;
window.popupFixDabs = toFix;

Please see this page for translations of the script interface and of this page into other languages. You'll also find instructions for creating a translation yourself.

If a user on Firefox with the Adblock Plus extension installed cannot see the popup, only the normal tooltip, Adblock Plus may be blocking the operation of navigational popups. This can be solved by adding an exception to the filtering rules – go to the Main Page, click the icon in the browser toolbar, and turn off [Block ads on] This website: en.wikipedia.org.

This tool should not be affected by any browser popup blocking settings.

Code	Result
{{User:The Anonymouse/Userboxes/Navigation popups}}	This user uses Navigation popups for a variety of tasks.	Usage
{{User:UBX/Navigation popups}}	This user watches over Wikipedia with the help of Navigation popups!	Usage

There is also a Navigation popups topicon. {{Navigation popups topicon}}.

Please see Wikipedia talk:Tools/Navigation popups, or the associated Phabricator project (for implementation-related discussion).

This tool was primarily written by Lupin, who is currently no longer active on Wikipedia. It depends on some other people's work:

• User:Pilaf/InstaView (née Live Preview) by Pilaf for article previewing
• a JavaScript MD5 hash function by Paul Johnston and others, available here
• domdrag by Aaron Boodman
• An implementation of a diff algorithm by John Resig

Older versions of the tool used overlib by Erik Bosrup.

• Lupin – original development, has not been active on Wikipedia since 2009.
• Brian0918 – a little code and lots of inspiration
• Eddideigel – translation work
• IceKarma – aborting download code, making much better use of bandwidth
• Mike Dillon – the page age code
• Yurik – with his fantastic MediaWiki BotQuery extension
• Zocky – the menus
• Zyxw – preview enhancements
• TheDJ – conversion from BotQuery to API.
• ...and many more with helpful suggestions, comments and bug reports