I like reusing OOB SharePoint icons in my custom apps. I usually just copy the img URL into one of my tags but it seems with themes, they have a themedpng extension. How can I reuse the 'New Item' plus Icon and have the same URI without breaking when going to another environment?
It shows this Img src in the markup:
/sites/_catalogs/theme/Themed/B5CDC77D/spcommon-B35BB0A9.themedpng?ctag=2