Brendan Eich of Netscape (now Mozilla) developed JavaScript in 1995. Originally, it was named as Mocha, later its name was changed to Livescript, and finally it was renamed to JavaScript. After its launch, Microsoft introduced Jscript—their own version of JavaScript that was included in Internet Explorer. Netscape submitted JavaScript to European Computer Manufacturers Association(ECMA) for standardization and specification. The standardized version was named ECMAScript. ECMAScript is a trademarked scripting language specification standardized by ECMA International.
The ECMAScript V5 introduced a new mode called the strict mode; this brought forward better and thorough error checking to avoid constructs that cause errors. Many ambiguities from the third version were removed and real-world implementations were added.
The ECMAScriptV6 added plenty of new syntax for writing complex programs. It introduced classes and modules extending the semantics from V5. Iterators were...