Toggle Format Operation

// Toggle format is a composite operation
function toggleFormat(editor: Editor, selection: Selection, format: string) {
  const hasFormat = editor.hasFormat(selection, format);
  
  if (hasFormat) {
    // Remove format
    editor.applyOperation({
      type: 'removeFormat',
      path: selection.start,
      length: selection.length,
      format: format
    });
  } else {
    // Apply format
    editor.applyOperation({
      type: 'applyFormat',
      path: selection.start,
      length: selection.length,
      format: format,
      value: true
    });
  }
}

// In transaction
function toggleFormatInTransaction(editor: Editor, selection: Selection, format: string) {
  const tx = editor.beginTransaction();
  const hasFormat = editor.hasFormat(selection, format);
  
  if (hasFormat) {
    tx.add({
      type: 'removeFormat',
      path: selection.start,
      length: selection.length,
      format: format
    });
  } else {
    tx.add({
      type: 'applyFormat',
      path: selection.start,
      length: selection.length,
      format: format,
      value: true
    });
  }
  
  tx.commit();
}