The State of JavaScript 2019

Over 20,000 developers have shared what are their favorite JavaScript features, front-end frameworks and back-end frameworks in a new annual survey. The figures come from the fourth State of JavaScript survey, which included responses from 21,717 developers around the world. On the flavors front -- languages that compile to JavaScript -- most developers were satisfied with Microsoft-backed open-source JavaScript superset, TypeScript, followed by Reason, Elm, ClosureScript, and PureScript. But TypeScript also came out on top when ranking developers' interest as well as awareness. Some 58% of developers reported having used TypeScript and that they would use it again, compared to less than 5% for all other flavors of JavaScript.