createProgress
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createProgress(
opts):ProgressHandle
Defined in: ui/widgets/progress.ts:49
Linear progress bar. Two entities: a track (background) and a fill child
that stretches over the track as a UIVisualType.Filled visual —
setValue writes fillAmount, so the bar is a render-time crop with no
per-frame layout pass, and a sprite fill reveals (not stretches). Direction
selects the fill axis/origin.