Ruby on Rails check if javascript is enabled

Question

How can I check in my layout code if the user has enabled javascript in his browser? If javascript is not enabled I want to show an error page. E.g. a 404 or a 500 error page. How can I do this with Rails?

http://stackoverflow.com/questions/13157135/check-whether-javascript-and-cookies-are-enabled-in-ruby-on-rails — Ivaylo Strandjev, Mar 10 '13 at 14:56

score 8 · Accepted Answer · edited May 23 '17 at 12:34

I'm not sure if checking for javascript within Rails is ideal. I found this if you really do want to do it: Check if Javascript is Enabled (Serverside) with Rails

However, you can just show a message with <noscript> tag like:

<noscript>YOU DON'T HAVE JAVASCRIPT AND THAT OFFENDS ME</noscript>

Most browsers have javascript enabled by default so this is an uncommon problem. If you want you can include a link_to within the <noscript> in order to show them how to activate javascript like this:

<noscript>You don't have javascript enabled. Please follow this link for assistance in turning it on. <%= link_to "Turn on javascript", "http://www.enable-javascript.com" %>

EDIT

I just found this. I haven't tried it but it looks like exactly what you're looking for: Ruby on Rails, Javascript detection

<head>
    <!-- title, scripts, css etc go here -->
    <noscript>
        <meta http-equiv="refresh" content="2;url=http://yoursite.com/nojswarning.html">
    </noscript>
</head>

thank you, great post, worked perfectly. – Chris Hough Mar 02 '14 at 02:50 — Chris Hough, Mar 02 '14 at 02:50

Ruby on Rails check if javascript is enabled

1 Answers1