How do I use jQuery in Rails?

Question

I tried to use jQuery in a Rails view with if but it didn't work well. Any advicse?

This is the view:

 jquery when the page ready
 :javascript
  $(document).ready(function{
 $('#msg').hide(); 
  })

 -if !@x || !@p 
  :javascript
   $(document).ready(function{
   $('#msg').show(); 
   })
  %h5.alert.alert-error#msg.put Invalid email or password

This is the controller:

@x=Profolio.find_by_email(params[:user])
@p=Profolio.find_by_password(params[:userpassword])

It's best if you keep your Javascript in separate files and have them included in rather than code them into the view. Just good practice with "separation of concerns." — Brandon Buck
– Brandon Buck, Commented Apr 5, 2013 at 3:43

Travis Pessetto · Accepted Answer · 2013-04-05 12:21:12Z

1

For one, it looks like your jQuery is malformed. Your view should look like:

:javascript
$(document).ready(function()
{
  $('#msg').show();
});

Notice the () by function.

I am also unsure if you're using HAML or what, but :javascript could just be :script.

Also, Rails should load jQuery by itself as jQuery is the defacto JavaScript framework of newer versions of Rails.

edited Apr 5, 2013 at 12:21

answered Apr 4, 2013 at 22:32

Travis Pessetto

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2 Comments

Brandon Buck Over a year ago

Your last remark is wrong, regardless of where the Javascript is, if it's dependent on the document is should wait for the document to load before firing.

Travis Pessetto Over a year ago

@izuriel Thanks, I removed it.

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