Function traverseEnterLeave

docs/external/js/react-dom.development.js:8174–8225

* Traverses the ID hierarchy and invokes the supplied `cb` on any IDs that * should would receive a `mouseEnter` or `mouseLeave` event. * * Does not invoke the callback on the nearest common ancestor because nothing * "entered" or "left" that element.

(from, to, fn, argFrom, argTo)

   */

  function traverseEnterLeave(from, to, fn, argFrom, argTo) {
    var common = from && to ? getLowestCommonAncestor(from, to) : null;
    var pathFrom = [];

    while (true) {
      if (!from) {
        break;
      }

      if (from === common) {
        break;
      }

      var alternate = from.alternate;

      if (alternate !== null && alternate === common) {
        break;
      }

      pathFrom.push(from);
      from = getParent(from);
    }

    var pathTo = [];

    while (true) {
      if (!to) {
        break;
      }

      if (to === common) {
        break;
      }

      var _alternate = to.alternate;

      if (_alternate !== null && _alternate === common) {
        break;
      }

      pathTo.push(to);
      to = getParent(to);
    }

    for (var i = 0; i < pathFrom.length; i++) {
      fn(pathFrom[i], 'bubbled', argFrom);
    }

    for (var _i = pathTo.length; _i-- > 0;) {
      fn(pathTo[_i], 'captured', argTo);
    }
  }

  function isInteractive(tag) {
    return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';