I have an element (in html)
<image xlink:url="https://abc" id="my_ele">
I do
ele = document.getElementById("my_ele")
// Now want to get https://abc
This answer here Getting 'xlink:href' attribute of the SVG <image> element dynamically using JS in HTML DOM
says:
getAttributeNS('http://www.w3.org/1999/xlink', 'href');
But I'm not really sure what that translates to in my example.
(btw, Google docs displays images like this, at least in Chrome. Don't know why they don't use a proper IMG tag.)