mocanvasv4.11.2

HistoryManager

declare class HistoryManager<R extends UnknownRecord>

Undo/redo over store diffs. Every user-sourced document change is recorded; marks delimit undo steps. Undo applies the reverse of every diff back to the previous mark.

On this page

bail bailToMark clear constructor destroy getNumRedos getNumUndos getVersion ignore mark redo squashToMark undo

Methods · 13

bail(): this

Undo to the previous mark and drop the undone entries (no redo).

bailToMark(id: string): this

Undo back to a specific mark and drop the entries.

clear(): void

constructor(store: Store<R>, onBatchComplete?: (() => void) | undefined)

destroy(): void

getNumRedos(): number

getNumUndos(): number

getVersion(): number

Reactive counter for UI.

ignore<T>(fn: () => T): T

Run fn without recording its changes.

mark(id?: string): string

Place a stopping point. Returns the mark id.

redo(): this

squashToMark(id: string): this

Merge every diff since id into one step (the mark stays).

undo(): this

All of @mocanvas/editor Guides Demos

mocanvas

Docs Licensing mocanvas@symbio.agency

mocanvas is built by Symbio. Free for non-commercial, non-profit and development use; commercial use needs an agreement. Not affiliated with or endorsed by tldraw.