August 2023
Intermediate to advanced
419 pages
9h 2m
English
Content preview from TypeScript Cookbook
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,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 11. Classes
When TypeScript was released for the very first time in 2012, the JavaScript ecosystem and the features of the JavaScript language were not comparable to what we have today. TypeScript introduced many features not only in the form of a type system but also syntax, enriching an already existing language with possibilities to abstract parts of your code across modules, namespaces, and types.
One of these features was classes, a staple in object-oriented programming. TypeScript’s classes originally drew a lot of influence from C#, which is not surprising if you know the people behind both programming languages.1 But they are also designed based on concepts from the abandoned ECMAScript 4 proposals.
Over time, JavaScript gained much of the language features pioneered by TypeScript and others; classes, along with private fields, static blocks, and decorators, are now part of the ECMAScript standard and have been shipped to language runtimes in the browser and the server.
This leaves TypeScript in a sweet spot between the innovation it brought to the language in the early days and standards, which is what the TypeScript team sees as a baseline for all upcoming features of the type system. While the original design is close to what JavaScript ended up with, there are some differences worth mentioning.
In this chapter, we look at how classes behave in TypeScript and JavaScript, the possibilities we have to express ourselves, and the differences between the standard ...
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.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.