Get the label name of a term through JSOM

Question

I am trying to get the Label(Title - shown in the Navigation UI) of a term through JSOM. I have successfully got the ID of the term.

Now I got stuck in getting the Label of term using ID. I have pasted my code below. Any suggestions, what am I missing here?

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

<script>
$(document).ready(function(){  

    var scriptbase = _spPageContextInfo.webServerRelativeUrl + "/_layouts/15/"; 
    $.getScript(scriptbase + "SP.Runtime.js",
        function () {
            $.getScript(scriptbase + "SP.js", function(){            
                $.getScript(scriptbase + "SP.Taxonomy.js", execOperation);
            });
        }
    );
});

function execOperation(){

    var termSetName = "ADLA";
    var locale = 1033; 
    var clientContext  = SP.ClientContext.get_current();
    var taxonomySession = SP.Taxonomy.TaxonomySession.getTaxonomySession(clientContext);
    var termStore = taxonomySession.getDefaultSiteCollectionTermStore();
    var termSets = termStore.getTermSetsByName(termSetName, locale);
    var termSet = termSets.getByName(termSetName);
    var terms = termSet.getAllTerms();

    clientContext.load(taxonomySession);
    clientContext.load(termStore);
    clientContext.load(termSet);
    clientContext.load(terms);
    clientContext.executeQueryAsync(function onSuccess() {
        var chaparray={};

        var enumerator = terms.getEnumerator();
        while (enumerator.moveNext()) {
            var spTerm = enumerator.get_current();
            var name = spTerm.get_name();
            var id = spTerm.get_id();


    }
}, function onFailure(args) {
    alert('Error: '+args.get_message());
});
}

</script>

Updated:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

<script>
$(document).ready(function(){  
var taxonomySession;
var clientContext;
    var scriptbase = _spPageContextInfo.webServerRelativeUrl + "/_layouts/15/"; 
    $.getScript(scriptbase + "SP.Runtime.js",
        function () {
            $.getScript(scriptbase + "SP.js", function(){            
                $.getScript(scriptbase + "SP.Taxonomy.js", execOperation);
            });
        }
    );
});

function execOperation(){

    var termSetName = "ADLA";
    var locale = 1033; 
    clientContext  = SP.ClientContext.get_current();
    taxonomySession = SP.Taxonomy.TaxonomySession.getTaxonomySession(clientContext);
    var termStore = taxonomySession.getDefaultSiteCollectionTermStore();
    var termSets = termStore.getTermSetsByName(termSetName, locale);
    var termSet = termSets.getByName(termSetName);
    var terms = termSet.getAllTerms();

    clientContext.load(taxonomySession);
    clientContext.load(termStore);
    clientContext.load(termSet);
    clientContext.load(terms);
    clientContext.executeQueryAsync(function onSuccess() {
        var chaparray={};

        var enumerator = terms.getEnumerator();
        while (enumerator.moveNext()) {
            var spTerm = enumerator.get_current();
            var name = spTerm.get_name();
            var id = spTerm.get_id();

            getTermDefaultValue(id,1033);

        }


    },
function onFailure(args) {
    alert('Error: '+args.get_message());
});

}

function getTermDefaultValue(termId, lcid) {
    var termDefaultValue = taxonomySession.getTerm(termId).getDefaultLabel(lcid);  
}

</script>

Below is the image.. I need to get the "Chapter-1" text.

var taxonomySession = new TaxonomySession(site);
                var termStore = taxonomySession.DefaultKeywordsTermStore;
                var termStoreGroup = termStore.GetSiteCollectionGroup(site);
                var termSet = termStoreGroup.CreateTermSet("ADLA");
                termSet.IsAvailableForTagging = true;
                termSet.TermStore.CommitAll();

Answer 1

When you enable Managed navigation for a site , the navigation node title is stored as a local custom property named _Sys_Nav_Title .

So if you want to get this data from JSOM you could use below code:

spTerm.get_localCustomProperties()["_Sys_Nav_Title"];