JavaScript is a programming language. we can perform logical operations using JavaScript. JavaScript has the same role in the websites as the soul in the human body. websites created using HTML and CSS were undoubtedly beautiful but there was a lack of interactivity. users have buttons on the websites by clicking on the buttons the new webpage opens, all this can be done using JavaScript. we can make the elements move on the webpage with the help of JavaScript. when the user requests the server to log in by inputting email and password then authentication of that data is done using javascript and in case of an invalid email, the server tells users to write the correct email with the help of JavaScript. so authentication and validation are done using JavaScript. gamers make movements in the front end of online games that's all because of JavaScript.

websites were only static before javascript. the front end has to request the server for every movement and the webpage has to refresh every time which makes the user experience worst. javascript was developed to increase interactivity in the websites. the first name of javascript was Moca after the name of coffee because developers of that time were obsessed with coffee and they used to name every tool after the name of the coffee. the name was changed to LiveScript after some time. developers again changed the name from LiveScript to javascript to make javascript famous because java was a very famous programming language at that time. the websites were rendered on the browsers and could not be rendered on the local machine. the browser named V8 of google was famous at that time and V8 was able to render the website having javascript content. V8 was a chromium-based browser of google. V8 name was changed to google chrome after some time. a developer named Rann dahl extracts the code and specifications and after making some improvements created node.js which was able to render the website on the local computer.