Typescript

"The reason I would use a transpiler today is if and only if it lets me experience the future now."
The future of Javascript (S3, EP3)

TypeScript related stuff that is good to know.

http://www.typescriptlang.org/docs/tutorial.html

A nice deep dive: https://www.gitbook.com/book/basarat/typescript/details

Some acronyms spelled out

Javascript = Ecmascript

The Ecmascript running in today's browsers is a mix of Ecmascript 5 and Ecmascript 6 see : http://kangax.github.io/compat-table/es6/

Ecmascript 6 is a superset of Ecmascript 5

Ecmascript is sometimes called ES

ES2015 = Ecmascript 6

ESNext = Ecmascript 7

Typescript is a superset of Ecmascript 6 aligned to Ecmascript 7

All valid Ecmascript 5 is also valid Typescript.