SharePoint Online: Search a Taxonomy term in a TermSet using JSOM

TaxonomyTermSearch.js

(function () {

    SP.SOD.executeFunc("sp.js", "SP.ClientContext", function () {
        SP.SOD.registerSod("sp.taxonomy.js", SP.Utilities.Utility.getLayoutsPageUrl("sp.taxonomy.js"));
        SP.SOD.executeFunc("sp.taxonomy.js", "SP.Taxonomy.TaxonomySession", runFunc);
    });

    function runFunc() {

        //Current Context
        var context = SP.ClientContext.get_current();

        //Current Taxonomy Session
        var taxSession = SP.Taxonomy.TaxonomySession.getTaxonomySession(context);

        //Name of the Term Store from which to get the Terms.
        var termStore = taxSession.getDefaultSiteCollectionTermStore();

        //GUID of Term Set from which to get the Terms.
        var termSet = termStore.getTermSet("7c16e180-d093-4709-8426-e7997acb4302");

        var lmi = SP.Taxonomy.LabelMatchInformation.newObject(context);

        //Populate the various properties
        lmi.set_termLabel("a"); //search terms.
        lmi.set_defaultLabelOnly(true);
        lmi.set_stringMatchOption(SP.Taxonomy.StringMatchOption.startsWith);
        lmi.set_resultCollectionSize(10); //terms to bring back
        lmi.set_trimUnavailable(true);

        var terms = termSet.getTerms(lmi);
        context.load(terms, 'Include(IsRoot, Id, Name, LocalCustomProperties)');
        context.executeQueryAsync(function () {
            //success
            var termEnumerator = terms.getEnumerator();

            while (termEnumerator.moveNext()) {

                var currentTerm = termEnumerator.get_current();

                console.log(currentTerm.get_name());

            }

        }, function (sender, args) {
            //fail
            console.log(args.get_message());
        });
    }

})();