When pressing the "back" button in the browser, the page displays JSON data instead of HTML, which is achieved by utilizing Rails and d3.js programming

Creating a visualization in Rails with a d3.js JSON callback can be done like this:

View

d3.json(document.URL, function(data){ 
    // create visualization
}

Controller

def index
    respond_to do |format|
        format.html do
            # render the HTML
        end
        format.json do
            # render the JSON
        end
    end
end

Everything is working well. However, there is an issue when a user returns to the visualization using the browser's "back" button, they see the JSON instead of the HTML.

Do you have any suggestions on how to solve this problem?

Answer №1

One reason for this behavior is that when you press the back button, the browser displays the last cached data for the URL. In your situation, the cached content is the JSON data requested via AJAX (D3).

In addition to the solution provided, you can also try another approach - simply add .html to the page URL. This can be automated by implementing a filter in the controller or ApplicationController:

   before_filter do
     if request.format == :html && !params[:format]
       redirect_to format: :html
     end
   end

Another standard method involves using the Vary: Accept header, but it may lead to issues due to a reported Chrome bug and problems outlined in The browser cache is Vary broken.

Answer №2

d3.csv(window.location.origin + "/data.json" + window.location.search.slice(0), function(data){  
    // create visualization
}

Inspired by this post.

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