1. History and jobs

Javascript is a programming language defined in 10 days and 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 turned out to be a rich idea, enabling dynamic manipulation of the browser's own entities, i.e. text and forms, in 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, named ECMA-262, began in 1997 and culminates today with the current standard, ECMAScript 2015 (also known as ES6 because it's the sixth version) which, adopted in June 2015, predates even the currently deployed implementations. It is this version that will be presented in this article.

...