@bernsk The What's New blog shows a great example of a pop-using CSS Grid formatting using HTML grid code, but I can't seem to get this working. Is there a help page or a tutorial somewhere that shows what tags are available, or even a download of the code for the frog pop-up in that post?
Hi @RoanokeDave, here's a blog post covering the new flexbox and grid CSS support. The blog includes examples with links to the example maps. You can access the code for the examples within the maps. Hope that helps.
If you're curious about HTML tags, check out the ArcGIS Online supported HTML page. We will be updating it to include a list of supported CSS.
Thanks, Lauren - I can't wait to try this out.