History in Angular Document Editor component
11 Aug 20261 minute to read
Angular DOCX Editor (Document Editor) tracks the history of all editing actions done in the document, which allows undo and redo functionality.
Enable or disable history
Inject the ‘EditorHistory’ module in your application to provide history preservation functionality for the Document Editor. Refer to the following code example.
import { Component, ViewEncapsulation } from '@angular/core';
import { DocumentEditorComponent, SfdtExportService, SelectionService, EditorService, EditorHistoryService } from '@syncfusion/ej2-angular-documenteditor';
@Component({
selector: 'app-container',
//specifies the template string for the Document Editor component
template: `<ejs-documenteditor #document_editor id="container" style="width: 100%;height: 100%;display:block" [isReadOnly]=false [enableSelection]=true [enableEditor]=true [enableEditorHistory]=true >
</ejs-documenteditor>`,
encapsulation: ViewEncapsulation.None,
//Inject require modules.
providers: [SfdtExportService, SelectionService, EditorService, EditorHistoryService]
})
export class AppComponent {
}You can enable or disable history preservation for the Document Editor instance at any time using the ‘enableEditorHistory’ property. Refer to the following sample code.
this.documentEditor.enableEditorHistory = false;Undo and Redo
You can perform undo and redo using the ‘Ctrl+Z’ and ‘Ctrl+Y’ keyboard shortcuts. The Document Editor exposes APIs to do it programmatically.
To undo the last editing operation in the Document Editor, refer to the following sample code.
this.documentEditor.editorHistory.undo();To redo the last undone action, refer to the following code example.
this.documentEditor.editorHistory.redo();Stack size
History of editing actions is maintained in a stack, so that the last item will be reverted first. By default, the Document Editor limits the size of undo and redo stacks to 500 each respectively. However, you can customize this limit. Refer to the following sample code.
this.documentEditor.editorHistory.undoLimit = 400;
this.documentEditor.editorHistory.redoLimit = 400;