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JavaScript Tutorial

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Javascript History

JavaScript was first released in 1995 and confirms to ECMAScript (ES) specification. Here is the timeline of JavaScript.
  • 1995 - First released
  • 2009 - ES5 released
  • 2015 - ES6 released
  • 2016 - ES7 released
  • 2017 - ES8 released
  • 2018 - ES9 released
  • 2019 - ES10 released
ES6 and onward specifications provide many new features but some browsers will not support new features. In such scenario, we use transpiling and polyfill to write code in newer version and then that code is converted into older specification. Each browser has a javascript engine that is used to execute the JavaScript code.
  • Google Chrome - V8
  • Microsoft Edge - Chakra
  • Firefox - SpiderMonkey
  • Safari - JavaScriptCore
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