ECMAScript

ECMAScript (or ES) is a trademarked scripting-language specification standardized by Ecma International in ECMA-262 and ISO/IEC 16262. It was based on JavaScript, which now tracks ECMAScript. It is commonly used for client-side scripting on the World Wide Web. Other implementations of ECMAScript include JScript and ActionScript - wikipedia

# Features

The ECMAScript language includes structured (structured programming), dynamic (dynamic programming language), functional (functional programming), and prototype-based (prototype-based programming) features.About - wikipedia

TypeScript is a free and open source programming language developed and maintained by Microsoft. It is a strict superset of JavaScript, and adds optional static typing and class-based object-oriented programming to the language. Anders Hejlsberg, lead architect of C# and creator of Delphi and Turbo Pascal, has worked on the development of TypeScript. TypeScript may be used to develop JavaScript applications for client-side or server-side (Node.js) execution - wikipedia