prepNavPanel

index.js

function prepNavPanel() {
  var boroIDs = ["mh", "bk", "qs", "xb", "si", "all"];

  boroIDs.forEach(function (boroID) {
    let buttonEl = document.getElementById(boroID);
    let id = buttonEl.id;

    buttonEl.onclick =
      id !== "all"
        ? function (e) {
          e.preventDefault();
          filterLocationList(id);
          setBoroView(id);
        }
        : function (e) {
          e.preventDefault();
          resetLocationList();
          setBoroView("all");
        };
  });
}