update toc in indesign document

ind_update_toc.jsx

#target "InDesign"

var update_toc = function (doc, opt) {
  var story_len = doc.stories.length;
  var _story, _toc_tfs;
  
  var toc_styles = doc.tocStyles;
  for (var i=0, len=toc_styles.length; i < len ; i++) {
    _story = doc.createTOC(toc_styles[i], true);

    if (opt.only_used && doc.stories.length > story_len ) {
      _toc_tfs = _story[0].textContainers;
      for (var j = _toc_tfs.length - 1; j >= 0; j--) {
        // remove textfreame created by unused toc-style
        _toc_tfs[j].remove();
      }
    }
    
  };
};

var doc = app.documents[0];
update_toc(doc, {only_used: true});