Plano is a neat and clean Xfce flat theme. It has both dark and light variants to choose from. But the total attire of this theme is quite modern and eye-soothing. The title bar icons look like old-school Windows XP icons. Then, items are resolved with htmltools::as.tags(), as explained in section 2.6.7.2. The title bar buttons are flat with colored highlights. This is to avoid uniqueness issue in case multiple accordions are present in the code, which would ultimately prevent the accordion from behaving properly. Lighten up: When you choose a light or dark theme in Skype, it will reflect during your Skype call.
All nested item ids are prefixed by the parent accordion id for instance we can write paste(id, 'heading', i, sep = '_'), where id refers to the parent accordion and i is the current item within the lapply loop. Look for the shiny new share icon next to your profile. We have to process all items and use lapply() since it works well with Shiny tags. We come back to bs_accordion() in order to create the correctīs_accordion_item() children ids (mentioned in 5) and treat missing attributes.
