code: function getCompsByElement(element) {
      var elements = element ? element : this.elements;
      var returnComps = [];
      if (typeof elements == 'string') {
          elements = document.querySelectorAll(elements);
      }
      if (!isArray(elements) && !(elements instanceof NodeList)) elements = [elements];
      each(elements, function (i, element) {
          if (element) {
              element.querySelectorAll('[u-meta]').forEach(function (ele) {
                  if (ele['u-meta']) {
                      var comp = ele['u-meta'];
                      if (comp) returnComps.push(comp);
                  }
              });
          }
      });
      return returnComps;
  }
docs: 获取某区域中的所有控件
  @param {object} element