Importance of JavaScript in software development

JavaScript is one of the most popular and growing programming languages for building software.
JavaScript is a lightweight programming language.
JavaScript is web browser compatible, which means it is supported by the most common browsers like Chrome, Firefox or Microsoft Edge.
The web developers can easily write custom client-side scripts in JavaScript, and integrate the scripts seamlessly into HTML.
JavaScript to make the web pages interactive, respond to users instantaneously, and create richer user interfaces, without less server interaction and reduces server load.
Despite being an interpreted programming language, JavaScript simplifies development of complex web applications by allowing developers to simplify the application’s composition.
JavaScript makes the web pages responsive very easily.

How does JavaScipt work?
JavaScript is what is known as a client-side script. Most Web applications, such as a search engine, work because of an interaction between the user’s device (e.g. computer, phone or tablet) and a remote server. The software on the remote server sends information to the client (i.e. the user’s machine) and the software on the client side reads the information and renders a Web page on screen.

Some of the dynamic website enhancements performed by JavaScript are:

Loading new content or data onto the page without reloading the page
Rollover effects and dropdown menus
Animating page elements such as fading, resizing or relocating
Playing audio and video
Validating input from Web forms
Repairing browser compatibility issues