JSFiddle - React, Tailwind, and code Playground

JavaScript

localStorage.setItem("a", 1);
  localStorage.setItem("b", 1);
  localStorage.setItem("c", 1);
  localStorage.setItem("d", 1);

    var store = [];
    for (var i = 0; i < localStorage.length; i++)
    {         
        store.push([localStorage.key(i), localStorage.getItem(localStorage.key(i))]);
    }
    document.write(JSON.stringify(store));