JSFiddle - React, Tailwind, and code Playground

JavaScript

localStorage.wizzard1 = 'foo';
localStorage.wizzard2 = 'bar';
localStorage.baz = 'baz';
localStorage.buzz = 'buzz';

Object.keys(localStorage).forEach((key) => {
  if (!key.includes('wizzard')) delete localStorage[key];
});
console.log(Object.keys(localStorage));