June 2026
Intermediate to advanced
626 pages
13h 22m
English
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1
Understanding TypeScript
JavaScript is one of the most widely used and powerful languages. According to GitHub's Octoverse 2025 report, JavaScript remains one of the six core languages used by nearly 80% of new repositories on GitHub. However, a major shift has occurred: in August 2025, TypeScript overtook both Python and JavaScript to become the most-used language on GitHub by contributor count, growing by over 1 million contributors year-over-year with a 66.63% growth rate. GitHub called this the most significant language shift in more than a decade.
In this chapter, we'll learn about the TypeScript language, why it was created, and what value it provides to JavaScript developers. We'll learn about the design philosophy Microsoft used in ...
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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.