fabricJS Not persisting Floodfill -

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i have algorithm floodfilling canvas. im trying incorporate fabricjs. here dilemna.... create fabric.canvas(). creates wrapper canvas , upper-canvas canvas. click on canvas apply floodfill(). works fine , applies color. go drag canvas objects around, or add additional objects canvas, color disappears , looks resets of sort.

any idea why is?

this happen because fabricjs wipe out canvas every frame , redraw internal data.


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