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How to send back js.haml in rails

Asked 2009-10-25T21:52:16.523
39

I have a rails create action which send back some jquery in a file:

create.js.erb

var appearance = $("<%= escape_javascript(render(:partial => @appearance)) %>").effect("highlight", {color: '#E6ff00'}, 2000);
$("#sortable").append(appearance);
$("#new_appearance")[0].reset();

I have started using HAML and want to know how I should be converting this. Can I use js.haml? If so what should the markup look like?

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2 Answers

77

Actually, returning JS in HAML is pretty easy, just use the :plain filter and enclose anything you want evaluated in #{}.

:plain
  var appearance = $("#{escape_javascript(render(:partial => @appearance)}").effect("highlight", {color: '#E6ff00'}, 2000);
  $("#sortable").append(appearance);
  $("#new_appearance")[0].reset();

Do not use the :javascript filter as it will enclose everything in a tag which is unnecessary.

If you need to use some logic, just put the :plain inside the nesting.

- if params[:printing]
  :plain
    $('#print-view').html("#{escape_javascript(render 'print_preview')}");

Sorry ERB.

answered 2011-02-17T17:56:02.630
0

In a js.haml it would look something like

!= "var appearance = $('<%= escape_javascript(render(:partial => @appearance)) %>').effect('highlight', {color: '#E6ff00'}, 2000);"
!= "$('#sortable').append(appearance);"
!= "$('#new_appearance')[0].reset();"

Note the HAML != syntax which prevents the generated text from being HTML escaped. I do agree that ERB is a better fit here, but for consistency stake you might still want to go the HAML way.

answered 2010-10-03T06:48:21.727

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