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I have a couple small images in an HTML document that I want to make portable, e.g. still works when emailing. I use the following, which works great:
<img src="data:image/png;base64,..."/>
Problem is, I want to use the same image many times in the document, but don’t want to repeat the entire base64 data string. I have seen in emails where the data is encoded a single time, but referenced many. Is this possible with HTML?
If you can use CSS, you could place it there instead, as a class.
Then just add the class to the elements you want.