JavaScript Version History

JavaScript Versions History

JavaScript was invented in 1995. The founder of JavaScript was Brendan Eich. After two years, the language became the European Computer Manufacturer's Association (ECMA). The documentary name of the language is ECMAScript. The versions abbreviation are ES1, ES2, ES3, and more. In 2015, it was named as an ECMAScript 2015.

ES1

It was the first version introduced by the founder of JavaScript in 1997. 

ES2

It was the second version released in 1998. It came with the same changes in the language. 

ES3

It was the third version released in 1999. The version came with additional functionalities such as regular expression and try/catch. 

ES4

It was the version announced by the team but never released. 

ES5

It was released in 2009. 

Multiple functionalities were introduced in the version:

• Add-on "strict mode"
• Add-on JSON support
• Add-on String.trim()
• Add-on Array.isArray()
• Add-on Array iteration methods

ES6

There are different parts of the version the was released. 

In 2015, 

• Add-on let and const
• Add-on default parameter values
• Add-on Array.find()
• Add-on Array.findIndex() 

In 2016,

• Add-on exponential operator (**)
• Add-on Array.prototype.includes

In 2017, 

• Add-on string padding
• Add-on Object.entries
• Add-on Object.values
• Add-on async functions
• Add-on shared memory

In 2018,

• Add-on rest / spread properties
• Add-on asynchronous iteration
• Add-on Promise.finally()
• Sum-up on to RegExp