editor.clearHistory()

Empties both the undo and redo stacks. The document content is untouched — only the recorded history is cleared. Call it after you load a fresh document programmatically so the user cannot undo their way back past the content you just set.

Syntax

editor.clearHistory()

Parameters

None.

Returns

Nothing (undefined).

Behavior notes

Content is not affected. Clearing history removes undo/redo records only; whatever is in the editor stays exactly as it is.
Toolbar state refreshes. After the stacks are emptied the editor re-evaluates its selection state, so the Undo and Redo toolbar buttons correctly show as disabled.
Pair it with a programmatic load. Setting content with setHTMLCode pushes an undo entry; calling clearHistory() right after makes that loaded state the clean starting point.

Example usage

Load a document and make it the baseline the user cannot undo past:

var editor1 = new RichTextEditor("#div_editor1");
editor1.setHTMLCode(loadedDocumentHtml);
editor1.clearHistory();   // fresh start; Undo is now disabled

Reset the editor when switching to a different record in a single-page app:

function openRecord(html) {
    editor1.setHTMLCode(html);
    editor1.clearHistory();
}

editor.setHTMLCode(html)— load content (pairs naturally with clearing history).
editor.commitBookmark()— finalize the current undo entry so the next edit starts a new one.
All editor methods— the full JavaScript API surface.

Documentation