Category specific CSS not refreshing unless F5

awesomerobot · May 10, 2022, 6:38pm

This appears to be a bug in core, so I’m re-categorizing it.

To repro:

Visit a category like Support - Discourse Meta
Refresh the page
Switch to another category
Take a look at the classes on the body tag, the previous category sticks around

Screen Shot 2022-05-10 at 2.31.33 PM

Seems to be added server-side, I had an engineer help troubleshoot and more specifically it seems to come from:

github.com/discourse/discourse

app/helpers/application_helper.rb

main


      
          def add_resource_preload_list(resource_url, type)
            links =
              controller.instance_variable_get(:@asset_preload_links) ||
                controller.instance_variable_set(:@asset_preload_links, [])
            links << %Q(<#{resource_url}>; rel="preload"; as="#{type}")
          end
          
          def discourse_csrf_tags
            # anon can not have a CSRF token cause these are all pages
            # that may be cached, causing a mismatch between session CSRF
            # and CSRF on page and horrible impossible to debug login issues
            csrf_meta_tags if current_user
          end
          
          def html_classes
            list = []
            list << "rtl" if rtl?
            list << text_size_class
            list << "anon" unless current_user
            list << @embed_class if @embed_class.present?
            list.join(" ")

Topic		Replies	Views
Body class from category not loading on topics on first load? Bug	4	1615	August 26, 2015
No category class when choosing a tag filter Bug	3	593	March 18, 2022
Category Specific Styling Question Product Support	0	398	July 28, 2020
Category navigation wrong CSS on refresh UX	4	870	August 11, 2022
Following on from Adding Unique Class Names Feature	19	4946	January 15, 2016

Category specific CSS not refreshing unless F5

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