JavaScript front & backend language.

JavaScript is the programming language of HTML and the Web. It makes web page dynamic. It is an interpreted programming language with object-oriented capabilities. it used in both frontend & backend. Node.js is best backend framework.
javaScript history-
1995 by Brendan Eich (NetScape)
Mocha
LiveScript
JavaScript
ECMAScript

Advantages of JS:

1.Client Side Execution
2.Validation on Browser
3.Easy Language
4.Versatile
5.Portable
6.Scalable and Maintainable

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Disadvantages of JS:

1.Less Secure
2.No Hardware Access
3.JavaScript Enable Browsers