all files / lib/features/keyboard/actions/ UndoAction.js

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import {
  isCmd,
  isShift
} from './helpers';
 
var undoKeys = ['z', 'Z'];
 
function undo(context) {
 
  if (isCmd(context.event) && !isShift(context.event)) {
    context.editorActions.trigger('undo');
 
    return true;
  }
}
 
export default {
  keys: undoKeys,
  callback: undo
};