Skip to Content
Learning TypeScript 2.x - Second Edition
book

Learning TypeScript 2.x - Second Edition

by Remo H. Jansen
April 2018
Beginner content levelBeginner
536 pages
13h 21m
English
Packt Publishing
Content preview from Learning TypeScript 2.x - Second Edition

Structural type system

In the type system of a programming language, a type is an object with a name and a structure. Some types have very simple data structures (such as primitives) while others use complex structures (such as classes).

The type system can use two different strategies to validate that a given value matches the desired type:

  • Nominal type system: In this type system, values are matched against a type by its name
  • Structural type system: In this type system, values are matched against a type by its structure

The TypeScript type system is a structural type system because the values are matched against a type by its structure, as the following code snippet demonstrates:

interface Person { name: string; surname: string; } function ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Mastering TypeScript - Fourth Edition

Mastering TypeScript - Fourth Edition

Nathan Rozentals
Learning TypeScript

Learning TypeScript

Josh Goldberg
TypeScript for Beginners

TypeScript for Beginners

Bharath Thippireddy

Publisher Resources

ISBN: 9781788391474Supplemental Content