Yup, OpenJsCad has the ability to do live editing, but it tends to render a bit slow when the models are somewhat more complex. It sends work back and forth to

Yup, OpenJsCad has the ability to do live editing, but it tends to render a bit slow when the models are somewhat more complex. It sends work back and forth to a background worker to generate the polygons, but it still has to send it all back to the main thread. Unfortunately, OpenJsCad doesn't seem to have a high rate of adoption among 3D printing modelers...at least not yet.