Javascript generate breadcrumb array from url pathname

crumby.js

const titleizeWord = (str) => `${str[0].toUpperCase()}${str.slice(1)}`;
const kebabToTitle = (str) => str.split("-").map(titleizeWord).join(" ");

const toBreadcrumbs = (pathname, { rootName = "Home", nameTransform = s=>s } = {}) =>
    pathname
        .split("/")
        .filter(Boolean)
        .reduce(
            (acc, curr, idx, arr) => {
                acc.path += `/${curr}`;
                acc.crumbs.push({
                    path: acc.path,
                    name: nameTransform(curr),
                });

                if (idx === arr.length - 1) return acc.crumbs;
                else return acc;
            },
            { path: "", crumbs: [{ path: "/", name: rootName }] },
        );


toBreadcrumbs("/team-members/joe-schmoe", { nameTransform: kebabToTitle });
/*
  [
    { path: "/", name: "Home" },
    { path: "/team-members", name: "Team Members },
    { path: "/team-members/joe-schmoe", name: "Joe Schmoe" },
  ]
*/