eic25

What made you think of this may I ask?

In my point of view it is more robust to do this server side than client side (no different browsers or devices, Javascript disabled, ….).
The basics are the same. Find the corresponding image tags, load the svg file content and replace the image tag.

A place to start would be the the_content filter.
But this is not a all detail deliberate solution. I am just interested in why this are done like they are done at the moment.