freehand eraser with real time erasing

[TomVanHaver]

Is your feature request related to a problem? Please describe.
We would like to implement a classic eraser functionality that can erase "real time".

Describe the solution you'd like
When freehand drawing in erase mode (= globalComposteOperation set to "destination-out" on the path) over an existing drawing, the erasing should be applied "real time", so onMouseMove, not onMouseUp.

Describe alternatives you've considered

• set "globalCompositeOperation" to "destination-out" on the brush
• apply the erase path intermediate (onMouseMove)
• apply the erasing on the "main" canvas, and not on the topcanvas (most plausible idea ?)

Additional context
image a: onMouseOver while erasing.

image b: erased after onMouseUp.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[alexwenbj]

@TomVanHaver Hi,Tom,I am looking for a eraser for the free drawing scence,would you please share your eraser code for us?Thank you.