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JavaScript JSON and Structured Clone Cheat Sheet

A 2-page reference for JSON and copying data: 14 short entries with copy-ready code.

ForDevelopers

javascript-json-and-structured-clone-cheat-sheet.pdfShowing 13 of 52 lines
// Parse JSON
const data = JSON.parse('{"a":1}');

// Stringify
JSON.stringify({ a: 1, b: [2, 3] }); // '{"a":1,"b":[2,3]}'

// Pretty print
JSON.stringify(data, null, 2);

// Pick keys when stringifying
JSON.stringify(user, ["id", "name"]);

// Replacer function

What's inside

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

About this item

A compact, printable reference for JSON and copying data. Each of the 14 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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