It has been standardised in the ECMAScript language specification (Standard ECMA-262).
The current spec is the 14th Edition - 14th Edition (June 2023), known as ECMAScript 2023.
The ECMAScript website can be found at http://www.ecmascript.org/
Also Wikipedia have a good overview of the specs history at https://en.wikipedia.org/wiki/ECMAScript.
Check out our Nodejs Page for more.
Transpilers allow us to write ES7 or above today but ship ES6 or ES5 Code that the browser can understand, this means we get all the new tooling support and features to speed up design and coding time.
But as browsers start to support more of ES7 you only need to change a config flag, then build & test to start shipping the new ES7 to the browsers.
Anders Hejlsberg, lead architect of C# and creator of Delphi and Turbo Pascal, has also worked on the development of TypeScript.
TypeScript can be installed from the command line using NPM or used with an IDE say like WebStorm or Visual Studio but Visual Studio Code also has great support for TypeScript.
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