Term ID by Term name JSOM

I need to do something like this.

var termID=getTermIDByTermName('My term Name');


function getTermIDByTermName(name){

    var ctx = SP.ClientContext.get_current();
    var taxonomySession = SP.Taxonomy.TaxonomySession.getTaxonomySession(ctx);
    var termStore = taxonomySession.getDefaultSiteCollectionTermStore();
    var termSets = termStore.getTermSetsByName(termSetName, lcid);
    var termSet = termSets.getByName(termSetName);
    ctx.load(termSet);

    return term.get_iD();

}

I can not proceed the JSOM code... Can anyone help me on this??