With this tool you can halt door movement in futuristic style, by manually adjustment in spatial placement. The form intrinsically supports the use of elastic/rubber bands as floor-side grip, which also prevents any damage to the floor or doorstop.

Scale the model as necessary. The downloaded standard mesh is somewhat small, but covers most common door gaps. It starts at ~0.75cm and reaches a height of ~2.3cm over a ~9cm functional length.