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RedMonk’s rankings combine the Stack Overflow numbers with GitHub pull requests to find out what developers are thinking about, as well as what they’re using. TypeScript has also gained popularity with this audience of developers, moving from 26 to 17 in the rankings. Some of that is down to interest on Stack Overflow, but mostly it’s because of the increased developer involvement on GitHub.
Indeed, GitHub’s own 2016 State of the Octoverse puts TypeScript as the 15th most popular of the 316 programming languages developers use for projects on GitHub (based on both the number of pull requests and the 250 percent increase in pull requests for TypeScript over the previous year).
RedMonk’s Stephen O’Grady notes that “it seems reasonable to suspect that Angular is playing a role” in the increasing popularity of TypeScript. Angular2 is just one of the projects that has adopted TypeScript though (Asana and Dojo already used it, as do internal projects at Adobe, Google, Palantir, SitePen and eBay). But it might be the best known — with Google employees like Rob Wormald [@robwormald] evangelizing TypeScript alongside Angular.
Not Just Angular2
“There’s no doubt the partnership that we have with the Angular team has helped drive the numbers,” core TypeScript developer Anders Hejlsberg told InApps Technology. “That goes without saying; but even so, I think the real point is that it was a massive vote of confidence on the part of an important industry force.”
That vote of confidence is broader than just Angular, he pointed out. “Lots of other frameworks are using TypeScript at this point. Aurelia, Ionic, NativeScript are all, in one way or another, involved in TypeScript. The Ember framework, the Glimmer framework that was just released is written in TypeScript.”
“We’re seeing a pretty large vote of confidence by a lot of people who have a lot of experience in this industry and I think that’s probably what everyone at large is noticing,” — Anders Hejlsberg
That vote of confidence brings framework users on board too. “We’ve done a lot of work to be a really great citizen in the React ecosystem. We support JSX, we support all the advanced type system features that you want like refactoring and code navigation on JSX markup. We’re also now working with the Vue.js community to provide better support for the patterns used in the framework,” Hejlsberg said.
Adding support for new frameworks is an important part of staying popular with developers. “We’re always on the lookout when it comes to frameworks. We understand that this a very dynamic ecosystem. It changes a lot; you’ve got to stay on your toes and work well with everything.”
There’s also been the same steady growth in the number of libraries with TypeScript definitions. DefinitelyTyped, a repository for TypeScript typed definitions, now has over 3,000 frameworks and libraries. That’s accelerated by automatically scraping and publishing declaration files as npm packages under the @type namespace.
“That means there’s now a very predictable way of discovering what framework have types – and we can auto provision the types. When we see you’re importing a particular framework we can go find types for you so you don’t have to do it anymore.” In fact, Hejlsberg claimed, “for some developers, that’s becoming a decision factor when they pick a framework; whether they can work with a framework and get types.”
“Often the way TypeScript ends up being adopted — in enterprises and start-ups and individual developers — is that you try it on one project and you say ‘wow, this is great!’ and then you start evangelizing and it grows locally in your sphere of influence.”— Anders Hejlsberg
The general rise in interest seems to be one of organic growth. “We don’t do any advertising whatsoever, this is all driven by the community. It’s actually steady growth and we’re just starting to notice the larger numbers now,” Hejlsberg said.
Hejlsberg notes that TypeScript is also the third most loved language in the Stack Overflow survey after Rust and Smalltalk (and just ahead of Swift and go) and the sixth most wanted language, head of both C# and Swift. “I think that speaks a lot to the fact that we’re actually solving real problems,” Hejlsberg said.
Microsoft’s Sphere of Influence
“We obviously have a large developer ecosystem already with C# and C++ and Visual Basic. Lots of enterprises use Microsoft tooling and they also have front ends, and when we start improving the world on the front end side, they sit up and take notice and start using that,” Hejlsberg admitted.
But while a lot of TypeScript development is done in Visual Studio, just as much is done in Visual Studio Code, Microsoft’s open source, cross-platform IDE. “That’s a community we increasingly did not have all that much of a connection to. For Visual Studio Code, half of our users are not on Windows, so all of a sudden we’re having a conversation with a developer community that we did not really converse much with previously.”
Open Source and on the Fast Track
The TypeScript team recently announced that releases will now happen every two months rather than quarterly, which Heljsberg called an attempt to make release dates more predictable, rather than holding up a new release to get a particular feature in. That’s the same approach that the ECMAScript committee is taking.
The new release cadence for TypeScript is also aligned with the Visual Studio Code schedule; partly because Visual Studio Code is actually written in TypeScript, but also because tooling is a key part of the appeal of TypeScript.
While it’s important that TypeScript supports multiple editors and IDEs, Hejlsberg noted that Visual Studio Code is another factor helping with the popularity of the language.
What makes this fast cadence possible are the tests required for pull requests to be accepted, guaranteeing the quality of the master branch, and the popularity of TypeScript, which means any problems are found quickly.
“We’re an open source project, we do a lot of work on GitHub. And we never take pull requests unless they pass all the 55,000 tests that we have, and unless they come with new tests if you’re implementing a new feature, or regressions test if it is fixing a bug. That means our master branch is always in very good shape,” he said.
Feature Image from GitHub
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