call jquery function from rails controller based on condition

Question

I would like to set the inner html of an element based on some condition. ie

    if cond
      js('$("#my-id").html(a)')
    else
      js('$("#my-id").html(b)')
    end

I found page.replace_html, but it's deprecated for rails 4.

Answer 1

Assuming you have remote request coming in to the controller (with remote: true), use:

respond_to do |format|
  format.js do 
    if cond
      render text: '$("#my-id").html(a)'
    else
      render text: '$("#my-id").html(b)'
    end
  end
end