docs: function registerComponents (newComponents) {
    var config = Vue$2.config;
    var newConfig = {};
    if (Array.isArray(newComponents)) {
      newComponents.forEach(function (component) {
        if (!component) {
          return
        }
        if (typeof component === 'string') {
          components[component] = true;
          newConfig[component] = true;
        } else if (typeof component === 'object' && typeof component.type === 'string') {
          components[component.type] = component;
          newConfig[component.type] = true;
        }
      });
      var oldIsReservedTag = config.isReservedTag;
      config.isReservedTag = function (name) {
        return newConfig[name] || oldIsReservedTag(name)
      };
    }
  }