welp... i just had to try it out didnt it 
Required version 8.1.22
Behold! JS INJECTED SVG CLICKER
jsInjectedSvgClicker.zip (3.6 KB)
edit: I made the value of the binding become the name it writes to in the view.custom props
Be sure to set the custom prop back to null after handling your event so you can trigger the onchange events on the prop 
It should only detect things inside this view. Haven't fully tested it though.