Aside: I think you might mean "Javascript-du-jour"? "De jure" (pronounced roughly "day jooray") means basically "legally speaking, but probably not practically

Aside: I think you might mean "Javascript-du-jour"? "De jure" (pronounced roughly "day jooray") means basically "legally speaking, but probably not practically speaking", the dual of "de facto". "Du jour" (pronounced roughly "doo zhoor") means "of the day", "the new thing", "the current fad".