Function _onceWrap

lib/events.js:635–641

(target, type, listener)

}

function _onceWrap(target, type, listener) {
  const state = { fired: false, wrapFn: undefined, target, type, listener };
  const wrapped = onceWrapper.bind(state);
  wrapped.listener = listener;
  state.wrapFn = wrapped;
  return wrapped;
}

/**
 * Adds a one-time `listener` function to the event emitter.