Breadcrumb using recursive function

recursive.js

const routes = ['home', 'grids', 'grid1'];
const breadcrumbs = [];
let level = 0;

while(level < routes.length) {
    breadcrumbs.push(routeTitleLink(routes.slice(0, level+1))); // calling recursive function for each route.
    level++
}

console.log(breadcrumbs)

function routeTitleLink(route) {
  return {
    title: route.slice(-1).toString().substr(0,1).toUpperCase() + route.slice(-1).toString().substr(1),
    link: route.join('/')
  }
}