Function checkAndSetDirectionKey

lib/internal/repl/utils.js:544–555

(keyName)

  let promptPos;

  function checkAndSetDirectionKey(keyName) {
    if (!labels[keyName]) {
      return false;
    }
    if (dir !== keyName) {
      // Reset the already matched set in case the direction is changed. That
      // way it's possible to find those entries again.
      alreadyMatched.clear();
      dir = keyName;
    }
    return true;
  }

  function goToNextHistoryIndex() {
    // Ignore this entry for further searches and continue to the next