Open the context
Choose the project folder and name the files or behavior involved.
Workflows
Coding workflows · Undo transaction history
03
A concrete starting point
Group a compound editor change into one undo transaction containing the before and after states. Test that undo restores the entire change and that a new edit clears the old redo branch.
Define the change
Describe the input, expected output and boundaries that must stay intact.
Inspect the work
Review the proposed edits and any commands before relying on their result.
Check the outcome
Compare actual behavior with the expected result. If a check fails, investigate it before applying more changes.
Undo transaction history
A concrete starting point
const before = snapshot(document);
const after = applyCompoundEdit(snapshot(before), commands);
if (!equalDocuments(before, after)) {
history.push({ before, after });
redoStack.length = 0;
}The example is a starting point for a real project, not a claim that generated code is already tested. Adjust paths, dependencies and expected behavior to match your application.