What is angular2 typescript and angular2 ecma script

Question

I'm learning Angular2. What is the difference between Angular2 with typescript and angular2 with ecmascript?

Answer 1

ECMAScript is the standard. JavaScript is the implementation. When people say ECMAScript they often mean JavaScript... the JavaScript that browsers understand.

Typescript is a "typed superset of JavaScript that compiles/transpiles to JavaScript." Today, that means you'll compile/transpile your TypeScript code into ECMAScript 5/ES5, since most browsers support that version. In the future, as browser support grows for ECMASCript 6/ES6/ES2015, you could compile your TypeScript into ES2015 instead of ES5.

TypeScript's primary purpose is not to add features to JavaScript – as is the purpose of ES2015 – but to make it easier and safer for developers to write and maintain large JavaScript applications. The primary benefit of TypeScript shows up before your application runs – when you're writing or maintaining code. Intellisense, code completion, the ability to use ES2015 features today, etc.

Angular 2 is written in TypeScript. If you write Angular 2 applications, I strongly recommend that you use TypeScript.