src/local-storage-ports.js
function setLocalStorageItem(key, value) {
  window.localStorage.setItem(key,
    JSON.stringify(value)
  );
}
function setLocalStorageItem(key, value) {
  window.localStorage.setItem(key,
    JSON.stringify(value)
  );
}
Set a value of any type in localStorage.
(Serializes in JSON before storing since Storage objects can only hold strings.)

@param {String} key   Key in localStorage
@param {*}      value The value to set