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JavaScript Web Storage and Cookies Cheat Sheet

A 2-page reference for localStorage, sessionStorage and cookies: 13 short entries with copy-ready code.

ForDevelopers

javascript-web-storage-and-cookies-cheat-sheet.pdfShowing 15 of 59 lines
// Save to localStorage
localStorage.setItem("theme", "dark");

// Read from localStorage
const theme = localStorage.getItem("theme") ?? "light";

// Remove and clear
localStorage.removeItem("theme");
localStorage.clear();

// Store JSON
localStorage.setItem("user", JSON.stringify({ id: 1 }));
const user = JSON.parse(localStorage.getItem("user") ?? "null");

// Safe read helper

What's inside

Format
PDF, Markdown
Contents
13 sections · 2 pages
Version
1.0 · Updated 3 Oct 2026
Licence
Commercial What this means
Checked
Checked before it ships
  • javascript-web-storage-and-cookies-cheat-sheet.pdfPDF · 20 KB
  • javascript-web-storage-and-cookies-cheat-sheet.mdMarkdown · 2 KB
  • LICENSE.txtadded to every download

About this item

A compact, printable reference for localStorage, sessionStorage and cookies. Each of the 13 entries has a one-line explanation and a small example you can paste into your editor. The PDF uses a two-column A4 layout designed to sit next to your keyboard, and the same content ships as Markdown so you can search it or drop it into your notes. Every JavaScript example targets ES2023.

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