function initTabs()

in styles/docfx.js [856:875]


    function initTabs(container) {
      var queryStringTabs = readTabsQueryStringParam();
      var elements = container.querySelectorAll('.tabGroup');
      var state = { groups: [], selectedTabs: [] };
      for (var i = 0; i < elements.length; i++) {
        var group = initTabGroup(elements.item(i));
        if (!group.independent) {
          updateVisibilityAndSelection(group, state);
          state.groups.push(group);
        }
      }
      container.addEventListener('click', function (event) { return handleClick(event, state); });
      if (state.groups.length === 0) {
        return state;
      }
      selectTabs(queryStringTabs, container);
      updateTabsQueryStringParam(state);
      notifyContentUpdated();
      return state;
    }