JavaScript Tutorial #01 Introduction

Posted at: May 4, 2019 2:55 PM

JavaScript is very popular programming language. Millions of users is using JavaScript. Now these days we should have knowledge of JavaScript for good programmer. Currently many frameworks use JavaScript like as Angular, React, Vue.js, Node.js etc.

JavaScript is a lightweight high-level, interpreted, dynamic programming language. And also know as scripting language of the web pages. It is a prototype-based, multi-paradigm and supports object-oriented, imperative and functional programming styles.

JavaScript is control the web page behavior on the occurrence of an event. Initially JavaScript used for only client side (Browser) but now these days also used on server side. Node.js is the popular example of runs JavaScript on server side.

JavaScript developed by Brendan Eich of Netscape Navigator 2.0 in September 1995. JavaScript was officially called LiveScript when it first shipped in beta releases of Netscape Navigator 2.0 in September 1995, but it was renamed JavaScript when it was deployed in the Netscape Navigator 2.0 beta 3 in December.

What is JavaScript?

  • JavaScript is a lightweight high-level, interpreted programming language.
  • JavaScript is a prototype-based and supports object-oriented, imperative and functional programming styles.
  • JavaScript is an easy to learn.
  • JavaScript is most well-known as the scripting language for Web pages.
  • JavaScript runs on the client side (Browser) of the web pages.
  • JavaScript also runs on the server side. Node.js is popular example.
  • JavaScript control the web page behavior on the occurrence of an event.
  • JavaScript is a full-fledged dynamic programming language

Where to use?

JavaScript code place any where in your web page like as <head>...</head> and <body>...</body> tags. JavaScript code execute within <script>...</script> tags.

In above example JavaScript code added in head and body tag.

What is ECMAScript?

ECMA stands for European Computer Manufacturers Association

The ECMAScript specification is a standardized specification of a scripting language developed by Brendan Eich of Netscape

ECMAScript (or ES) is a scripting-language specification standardized by Ecma International in ECMA-262 and ISO/IEC 16262. It was created to standardize JavaScript.

ECMAScript first edition was finalized in June 1997

The 6th edition, It is major version of ECMAScript initially known as ECMAScript 6 (ES6) then and later renamed to ECMAScript 2015, was finalized in June 2015.

The 7th edition, officially known as ECMAScript 2016, was finalized in June 2016.

The 8th edition, officially known as ECMAScript 2017, was finalized in June 2017.

The 9th edition, officially known as ECMAScript 2018, was finalized in June 2018.

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