How to read direction of onChange

[anneangersbach]

Hi,

I want to morph SVGs according to the values of the slider. How can I find out
a) in which direction it is being dragged, so I can detect which SVG to morph to
b) how far between two values the handle is so I can time the morphing
I thought I could do this via the percent property, however that gives me some very odd values (more like px width of the slider than something that is based on 0 - 100.