History

MMO.editor · 1 symbol · generated 30 Sep 2026

class

History

The undo/redo stack of one editable region.

class MMO.editor.History

Namespace: MMO.editor

The editor keeps its own instead of the browser's: the browser's only knows about what `execCommand` did, and half of what the tools do (colours, code, tables, a paste that is cleaned) is plain dom work it cannot undo. A step is the region's html and where the selection was, so undoing puts the caret back where it was too. Typing is not recorded key by key: `MMO.editor.History#touch` groups what is typed until a pause.

const history = new MMO.editor.History(region); history.commit(); //after a change history.undo(); //puts the previous html and selection back

Index

	constructor(root, max)
	reset()	Forget every step: the current content becomes the first one.
	snapshot()
	commit()	Record the current content as a new step, if it changed.
	touch(delay)	Record the current content after a pause: what is typed in one go is undone in one go.
	cancelTimer()	[internal]
	canUndo()
	canRedo()
	undo()	Go back one step
	redo()	Go forward one step
	restore(step, fallbackRange)	[internal] Put a step back in the region