Find a member path by name within a JS object

findJsPath.js

function findJsPaths(ob, name, cache) {
  cache = cache || [];
  var res = [];
  for (var key in ob) {
    var value = ob[key];
    if (key == name) {
      return [key];
    } else if (typeof value === 'object' || value != null) {
      if (cache.indexOf(value) == -1) {
        cache.push(value);
        var path = findJsPaths(ob[key], name, cache);
        if (path != null) {
          for (var p of path) {
            res.push(key + '.' + p);
          }
        }
      }
    }
  }
  return res;
}