Answer by Noel Kriegler for How to set a cache with Local Storage

You need to use Localstorages .setItem() and .getItem check this out.

https://www.taniarascia.com/how-to-use-local-storage-with-javascript/

So something like this

// set the itemlocalStorage.setItem('showCase', 3600);//get the itemvar showCase = localStorage.getItem('showCase');