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

The multiple-selection structure (switch)

The switch statement evaluates an expression, matches the expression's value to a case clause, and executes statements associated with that case. Switch statements and enumerations are often used together to improve the readability of the code.

In the following example, we declare a function that takes an enumeration named AlertLevel.

You will learn more about enumerations in Chapter 2, Working with Types.

Inside the function, we will generate an array of strings to store email addresses and execute a switch structure. Each of the options of the enumeration is a case in the switch structure:

enum AlertLevel{  info, warning, error } function getAlertSubscribers(level: AlertLevel){ let emails = new ...
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