EditTextToolApi.hasPendingEdits

Whether edits are pending — not yet in the document, so not yet in viewer.hasUnsavedChanges. Every way of leaving the tool writes them, and so does an export from createExporter(), so this is for a host's own beforeunload warning beside hasUnsavedChanges; false while the tool is not active.

window.addEventListener('beforeunload', (e) => {
  if (viewer.hasUnsavedChanges || viewer.tools.editText.hasPendingEdits) e.preventDefault();
});