How to understand javascript superset

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The superset of JavaScript is TypeScript. TypeScript is a free and open source programming language developed by Microsoft that supports the ES 6 standard.

Its design goal is to develop large applications, it can be compiled into pure JavaScript, compiled JavaScript can run on any browser.

language features

TypeScript is a language extension that adds features to JavaScript. Additional features include:

Type annotations and compile-time type checking

type inference

type erasure

interface

enumeration

Mixin

generic programming

namespace

tuple

Await

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