1. History and jobs

JavaScript is a programming language defined in 10 days in 1995 by Brendan Eich at Netscape. JavaScript was quickly incorporated into the browser produced by this company. Providing a language that runs in the browser proved to be a great idea, allowing dynamic manipulation of browser-specific entities, namely text and forms, in terms of both content and appearance.

JavaScript has long suffered from competing and divergent implementations: in the beginning, there was Netscape's JavaScript, Microsoft's JScript, and Macromedia's ActionScript. A standardization effort, called ECMA-262, began in 1997 and has now culminated in the current standard, ECMAScript 2015 (also known as ES6 because it is the sixth version), which was adopted in June 2015 and even precedes the implementations currently in use. It is this version that will be presented in this article....