[window.location.hash parser] #window #location #hash #parse #js #browser

getLocationHashMap.js

const getLocationHashMap = () => {
  const hash = window.location.hash.substring(
    window.location.hash.substring(0, 2) === "#!" ? 2 : 1
  );

  const hashMap = hash
    .split("&")
    .map((entry) => {
      const eqIndex = entry.indexOf("=");

      if (eqIndex === -1) {
        return [entry, undefined];
      } else {
        const kv = [entry.substring(0, eqIndex), entry.substring(eqIndex + 1)];

        return kv;
      }
    })
    .filter((entry) => entry[0])
    .reduce((res, entry) => {
      return Object.assign(res, { [entry[0]]: entry[1] });
    }, {});

  return hashMap;
};