Difference between TypeScript and ES6


TypeScript is an open-source pure object-oriented programing language. It is a strongly typed superset of JavaScript which compiles to plain JavaScript. TypeScript is developed and maintained by Microsoft under the Apache 2 license. It is not directly run on the browser. It needs a compiler to compile and generate in JavaScript file. TypeScript source file is in ".ts" extension. We can use any valid ".js" file by renaming it to ".ts" file. TypeScript is the ES6 version of JavaScript with some additional features.

History of TypeScript

Anders Hejlsberg developed TypeScript. It was first introduced for the public in the month of 1 October 2012. After two years of internal development at Microsoft, the new version of TypeScript 0.9 was released in 2013. The current version of TypeScript is TypeScript 3.4.5 which was released on 24 April 2019.


ECMAScript (ES) is a scripting language specification standardized by ECMA international. It was created to standardize JavaScript. The ES scripting language contains many implementations, and the most popular is JavaScript. The developers use ECMAScript mostly for client-side scripting of World Wide Web (WWW).

The sixth edition of ECMAScript standard is ECMAScript6 or ES6 and later renamed as ECMAScript 2015. It is a major enhancement to the JavaScript language, which allows us to write programs for complex applications. It adds many features intended to make large-scale software development easier. The most common ES6 web-browsers are Chrome and Firefox. A transpiler converts the ES6 based code into ES5 which is supported many browsers. TypeScript is a transpiler. Grunt, Gulp, and Babel are some other transpilers to compile the modules. Therefore, TypeScript supports ES6.


JavaScript introduced in May 1995 by Brendan Eich. It was initially called Mocha, a name chosen by Netscape founder Marc Andreessen, and later renamed to LiveScript. At the same time, Sun Microsystems owned the trademark for JavaScript. In December 1995, Netscape acquired a trademark license and renamed it to JavaScript.

In between 1996 and 1997, Netscape took JavaScript to the ECMA standards organization to maintain a specification for the language. In June 1997, the ECMA Technical Committee 39 (TC39) was created to continue to evolve the language, eventually releasing ECMA-262 Ed.1.

The first standard version of JavaScript was ECMAScript 1 was released on June 1997. After a year later, ECMAScript 2 was released, which contains only minor changes to keep a parallel ISO standard for JavaScript. In December 1999, ECMAScript 3 was released, which introduces a lot of popular features of JavaScript. In December 2009, ECMAScript or ES6 was published and subsequently renamed to ECMAScript 2015.

TypeScript vs. ES6

TypeScript vs. ES6
TypeScript ES6
Definition TypeScript is a free and open-source pure object-oriented programming language. It is developed and maintained by Microsoft. ES6 is a version of ECMAScript (ES), which is a scripting language specification standardized by ECMA international.
Explanation Typescript is to eradicate the development errors. ES6 is comparatively more flexible in development time.
Data-Types TypeScript supports all primitive data types. ES6 does not support all data types.
Features TypeScript contains features such as generics and type annotations, Inference, Enums, and Interfaces. ES6 does not support these features.
Scope Typescript has three scopes.
  1. Global Scope
  2. Class Scope
  3. Local Scope
ES6 has two scopes.
  1. Global Scope
  2. Local Scope
  1. if Statement
  2. if-else Statement
  3. else...if and nested if statements
  4. switch Statement
  1. if Statement
  2. if-else Statement
  3. The else- if ladder/nested if statements.
  4. switch?case Statement
Modules TypeScript Modules are of two types:
  1. Internal
  2. External modules
We can classify the ES6 modules in two ways:
  1. Importing a module
  2. Exporting a module
Loop Typescript and ES6 both are having same loops.
  1. Definite
  2. Indefinite
Typescript and ES6 both are having same loops.
  1. Definite
  2. Indefinite
Why choose The developers choose TypeScript:
  • Typesafe
  • JavaScript superset
  • Powerful type system, including generics & JS features.
  • Aligned with ES development for compatibility.
  • Structural, rather than nominal, subtyping.
  • Compile-time errors.
  • Starts and ends with JavaScript.
The developers choose ES6:
  • ES6 code is shorter than traditional JS
  • Module System Standardized
  • Extremely compact
  • Destructuring Assignment
Company using The list of companies which uses TypeScript are:
  • Slack
  • Asana
  • CircleCI
  • Intuit
  • Swat.io
  • Avocode
The list of companies which uses ES6 are:
  • Slack
  • StackShare
  • eBay
  • Asana
  • Intuit
  • Swat.io
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