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Add comments explaining Fabric listeners

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Evan Hahn 2022-01-11 17:18:19 -06:00 • committed by GitHub
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6
ts/mediaEditor/useFabricHistory.ts
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@ -186,6 +186,12 @@ export function useFabricHistory({
} }
return fabricEffectListener( return fabricEffectListener(
fabricCanvas, fabricCanvas,
// We want to take snapshots when objects are added, removed, and modified. The
// first two are obvious. We DON'T want to take snapshots before those things
// happen (like `object:moving`), and we also don't want to take redundant ones
// (which is why we don't listen to both `object:modified` and `object:rotated`).
//
// See <http://fabricjs.com/docs/fabric.Canvas.html#Canvas> for the list of events.
['object:added', 'object:modified', 'object:removed'], ['object:added', 'object:modified', 'object:removed'],
({ target }) => { ({ target }) => {
if (isTimeTraveling || target?.excludeFromExport) { if (isTimeTraveling || target?.excludeFromExport) {