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by SquareWheel 2556 days ago
There is an important difference between saying it is invalid html, and it is invalid amp markup. An img tag will work like normal. It just won't be a valid AMP page any longer.

>if your browser doesn't have JavaScript, it's not even going to know what any of those custom tags are, is it?

It wouldn't. <noscript> tags are needed for that. But Javascript is a web standard, and this is the correct way to create new elements.