TypeScript is now a

The beta version of Microsoft's TypeScript 3.6, released just before the weekend, is "destined to be a full feature," according to program manager Daniel Rosenwasser.

TypeScript is a superset of JavaScript designed to make it more suitable for the construction of large applications.

The classifications of the programming language of the Redmonk analysts show that TypeScript is in the top 10 for the first time. The Redmonk ratings are not an absolute guide to popularity, but are based on the use of public GitHub projects and queries on the site of the Overflow Stack developer community.

TypeScript "languished in the 1930s for years," said Stephen O & # 39; Grady, of Redmonk. but it has had a remarkable increase, surpassing both Objective-C and Swift. O & # 39; Grady attributed it to "the ubiquity of JavaScript combined with the optional security offered by TypeScript." JavaScript itself is number one in these classifications, followed by Java, Python, PHP and C ++.

Google's support for web applications, as well as server-side development with Node.js or other tools, has driven JavaScript. TypeScript is compiled in JavaScript, so it can be used wherever JavaScript is. TypeScript is also compiled into readable JavaScript, unlike some that use JavaScript more as a type of assembly language.

TypeScript 3.6 introduces improved iterator types and generator functions. A function of Generator is one that returns an object with which it can be repeated with next () so that it behaves like an array or a collection. Each call to next () calls the Generator function, which returns a value using the performance keyword and saves its status so that it knows where to resume.

TypeScript 3.6 has a new type of generator and an improved type iterator. The iterator type now allows you to specify the type generated, the type returned, and the type of the argument for next () . The type of generator requires that there be a return method and a launch method in a generator function, which improves the robustness of the code.

Another change is related to the error messages used for Promises, a common technique for asynchronous programming in JavaScript. TypeScript will ask you if you forget to use await or the method .then that is used to call a Promise function.

The semicolons at the end of declarations are optional in TypeScript, and automatic code correction in editors such as Visual Studio Code will no longer add semicolons if it detects that a file does not use them. The improved handling of semicolons is "one of the most demanded element sets", according to the GitHub 3.6 plan.

More details about TypeScript 3.6 are in the Rosenwasser publication here.

The plan is for TypeScript 3.6 to be fully released by the end of August, preceded by a launch candidate a few weeks earlier. ®

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