TypeScript 2.1 has been released.
As per announcement Announcing TypeScript 2.1, the biggest improvements are:
Finally, async/await is available for ES5/ES3 compilation (so: it doesn't require to compile to ES6 anymore).
This feature is really important, because, like in the C# world, it allows to develop async code in a linear fashion.
Object spead: it allows to shallow copy objects, and also to merge more of them in a single final result;
dually there are object rest, that are used to pickup extra properties in a destructuring operation.
- keyof operator: it allows to declare a type as an union string based on the fields of another object or class.
- Mapped types: they allow to declare a new type as a variation of another type;
merge with the keyof operator, they allow to declare a new type, based on another type, where all the fields are readonly, or boolean, or nullable, for example.
- Finally, as now there is a different behaviour in module imports, it is reccomended to change this value in your tsconfig.json file: