Get all TermSets for a TermStore in SharePoint Online

TermSetHelper.js

jQuery.getScript(getBaseUrl() + '/_layouts/15/sp.taxonomy.js', function () {
    var context = new SP.ClientContext.get_current();
    var session = SP.Taxonomy.TaxonomySession.getTaxonomySession(context);
    var termStore = session.getDefaultSiteCollectionTermStore();
    var groups = termStore.get_groups();
    var termSets = [];

    context.load(groups);

    context.executeQueryAsync(function () {
        var groupsEnum = groups.getEnumerator();

        console.log('Suggest Options');
        console.log('===============')

        while (groupsEnum.moveNext()) {            
            var currentGroup = groupsEnum.get_current();

            var group = {
              name: currentGroup.get_name(),
              id: currentGroup.get_id()
            };

            getTermSets(context, currentGroup.get_termSets(), group.name);
        }
    });
});

function getTermSets(context, termSets, name) {
    context.load(termSets);

    context.executeQueryAsync(
                function(){
                    var termSetEnum = termSets.getEnumerator();

                    while(termSetEnum.moveNext()) {
                        var termSet = termSetEnum.get_current();
                        var termSetName = termSet.get_name();
                        var termSetId = termSet.get_id();

                        console.log('{ title:"' + termSet.get_name() + '", property:"<MANAGED PROPERTY NAME>", id:"' + termSet.get_id() + '" }');
                    }
                }
    );
}

function getBaseUrl() {
      if (!window.location.origin) {
          window.location.origin = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '');
      }

      var path = window.location.pathname.split('/');

      if (typeof path[2] === "undefined") {
          return `${window.location.origin}`;
      } else {
          return `${window.location.origin}/${path[1]}/${path[2]}`;
      }
}