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TypeScript Classes and Interfaces Cheat Sheet

A 2-page reference for classes, interfaces and object types: 14 short entries with copy-ready code.

ForDevelopers

typescript-classes-and-interfaces-cheat-sheet.pdfShowing 22 of 88 lines
// Interface vs type alias
interface User {
  id: number;
  name: string;
}
type Point = { x: number; y: number };

// Optional and readonly properties
interface Config {
  readonly id: string;
  debug?: boolean;
}

// Extending interfaces
interface Admin extends User {
  permissions: string[];
}

// Index signatures
interface Dictionary {
  [key: string]: number;
}

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
  • typescript-classes-and-interfaces-cheat-sheet.pdfPDF · 20 KB
  • typescript-classes-and-interfaces-cheat-sheet.mdMarkdown · 2 KB
  • LICENSE.txtadded to every download

About this item

A compact, printable reference for classes, interfaces and object types. 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 TypeScript example targets TypeScript 5.

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