#2 🛑 History of Javascript | What is ECMAScript ? | Javascript Engine | Java vs Javascript - adarshtiwari1998/JavaScript-Crash-Course-Project-v1 GitHub Wiki

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1. HISTORY OF JAVASCRIpt

The early to mid-1990s was an important time for the internet.

  • In September 1995, a Netscape programmer named Brandan Eich developed a new scripting language in just 10 days.
  • It was originally named Mocha, but quickly became known as LiveScript and later, JavaScript.

2. JAVASCRIPT vs JAVA

JavaScript and Java have almost nothing in common.

  • it was also a marketing tactic to divert some attention from java, which was the most buzzed about language at the time.

3. WHAT IS ECMASCRIPT?

ECMAScript is a standard, like ECMAScript 2016, ECMAScript 2017, ECMAScript 2018.

  • Language such as ActionScript, JavaScript, JScript all use ECMAScript as its core.
  • 👉 Basically ECMAScript is the Specifications and Standard. 👈
  • And all Scripting language are follow this Standards ans Specifications.
  • 👉 Follow this link to know more about ECMAScript https://en.wikipedia.org/wiki/ECMAScript

4. WHAT IS JAVASCRIPT ENGINE?

JavaScript Engine execute the code of JavaScript.

  • In chrome browsers the v8 version javascript engine are preinstalled. Which is use to execute the javascript code in the browsers.
  • And if we execute the javascript code outside the browsers which is executed by same javascript engine. Example: If we run javscript code in Node.js, which is executed and run by javascript engine.
  • A JavsScript engine is a computer program that executes JavaScript(Js) code.
  1. Chakra JavaScript Engine is used in Microsoft Edge Browsers.
  2. SpiderMonkey JavaScript Engine is used in Firefox Browsers.
  3. v8 JavaScript Engine is used in Google Chrome Browsers. 4.Node.Js used v8 JavaScript Engine to run and execute JavaScript code.

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