I was posting an answer to a question from a user of this site when I noticed that in HTML there were image tags with src containing a backslash before the file name
<img src="galerias<img src="galerias%pre%1.jpg" id="fotos">
1.jpg" id="fotos">
I confess that it was the first time I saw something of this type and I did not find any publication that gave me any explanation about this type of address in the src attribute.
Is this supported? Any documentation about it?
From what I read in the HTML Standard documentation, the src attribute of the element must be a "non-empty URL potentially surrounded by valid spaces" (valid non-empty URL potentially surrounded by spaces).
And what is a valid non-empty URL potentially surrounded by spaces?
This is a valid non-empty URL after the white space has been removed. Which brings us to the next question:
What is a valid non-empty URL?
This is a valid URL string that is not empty. So ....
What is a valid URL string?
Now I swear I'll summarize it because it has a bit of detail. It can be relative or absolute. And in both cases and in all scenarios, the documentation I have read always quotes the character U + 002F (/).
So the conclusion is that it can probably work because the browser at the time of interpreting the URL does the fix automatically, but it is not the specification.