TypeScript version 4.0. is now available and announced recently by Microsoft. This version of the language represents the next generation of TypeScript as claimed by the developers at the tech giant. It provides more expressivity, productivity as well as scalability.
TypeScript is an open-source programming language developed by the tech giant. It is built by adding syntax for static type definitions on top of JavaScript. to describe the shape of an object is provided in a way by the types in this language. It allows TypeScript to validate that the code is working correctly as well as providing better documentation. It secured the second position as the most loved language according to the latest Stack Overflow Developers survey 2020.
As the most commonly used programming language by the developers, it secured the 9th position among 25 programming languages. Among the developers, it is one of the fastest-growing programming languages. Developers can use TypeScript to type while writing down the types of values and where they are used is the motive behind this language. It is possible for them before they run the code to check the code and let them know about mistakes.
To strip away types from the code leaving them with clean, readable JavaScript that runs anywhere is possible using the TypeScript compiler. A core part of many developer’s JavaScript stack is TypeScript in the present scenario. To support tools for large-scale JavaScript applications, the language adds optional types to JavaScript. The JavaScript can be of any browser, for any host, and on any operating systems.
Features of TypeScript 4.0
TypeScript 4.0 changes by providing a great speed boost and improves the build mode scenarios which imply both incremental and noEmitOnError. The inference process for rest parameters and rest tuple elements can be improved by TypeScript 4.0. To make easy typing of concat and tail JavaScript functions, TypeScript 4.0 brings two fundamental changes. The first change is that the spreads in tuple type syntax can now be generic and the second change is that the rest elements can occur anywhere in a tuple and not just at the end.
Variadic tuple types enable a lot of new exciting patterns, especially around function composition, and are expected to perform a better job in type-checking JavaScript’s built-in bind method. In TypeScript 4.0, labels are provided by tuple types. The connection between parameter lists and tuple types will be deepened by them. Along with implementing overloads in a type-safe way, labeled tuples are handy when taking advantage of patterns around tuples and argument lists.
Features such as custom JSX factories, editor improvements, and more are added in TypeScript 4.0 other than the above-mentioned ones. The upcoming version of TypeScript, i.e. TypeScript 4.1, is also around the corner.
