javascript - Detect Visited Link In Chrome - Stack Overflow

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I am using a userscript for Chrome and Firefox and I am checking for links that have been visited by the user. I have

a{
   color: blue;
}

a:visited{
   color: red !important;
}

in my css imported as soon as the page loads. The a-links on the page that I have visited are colored red instead of default of blue. I then use:

alert(window.getComputedStyle(document.getElementById("myLink"), null).getPropertyValue("color"))

on each link and they all return red for the visited links in Firefox but in Chrome they all return blue.

I was wondering how to implement finding visited links using javascript with Chrome. Jquery code or normal javascript code is fine. Thanks in advance.

I am using a userscript for Chrome and Firefox and I am checking for links that have been visited by the user. I have

a{
   color: blue;
}

a:visited{
   color: red !important;
}

in my css imported as soon as the page loads. The a-links on the page that I have visited are colored red instead of default of blue. I then use:

alert(window.getComputedStyle(document.getElementById("myLink"), null).getPropertyValue("color"))

on each link and they all return red for the visited links in Firefox but in Chrome they all return blue.

I was wondering how to implement finding visited links using javascript with Chrome. Jquery code or normal javascript code is fine. Thanks in advance.

• javascript
• jquery
• firefox
• google-chrome
• visited

Share Improve this question Follow asked Mar 22, 2011 at 16:00 user654628user654628 1,45922 gold badges1818 silver badges3737 bronze badges 2

• 1 I thought this privacy bug has long been fixed in Firefox, so it shouldn't work there: blog.mozilla./security/2010/03/31/… – user330315 Commented Mar 22, 2011 at 16:11
• Ok I see, I tried setting layout.css.visited_links_enabled to false in Firefox and links don't change color. So this means that there is absolutely no way to check if the user has visited the page before? – user654628 Commented Mar 22, 2011 at 23:28

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 12

A_horse_with_no_name is right. The :visited security issue was fixed in 2010 by the browser vendors, after a nifty demo (Spyjax; no longer up) demonstrated that any webpage could discover whether you've visited any given URL. You can verify that getComputedStyle on a link no longer returns the :visited color--even within the same domain:

// Test I used within the JS console.
// :visited is no longer detectable by getComputedStyle.
function getLinkColor(url) {
  var a = document.createElement('a');
  a.href = a.textContent = url;
  document.body.appendChild(a);
  return document.defaultView.getComputedStyle(a, null).color;
}
getLinkColor('http://stackoverflow./questions/5394099/detect-visited-link-in-chrome');
getLinkColor('http://stackoverflow./some-fake-path');

For Chrome extensions, if you want to detect whether a user has visited a URL, I think you'll have to request the "history" permission and call chrome.history.getVisits.

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