Introduction:
JavaScript is a programming language used to dynamically modify HTML and CSS to update a user interface. Most of the functions and applications that make the Internet indispensable to modern life are coded in some form of JavaScript.
Computers used to be much slower and browsers were bad at interpreting JavaScript, but now modern browsers have well-implemented JavaScript, computers are much faster, and bandwidth is a lot cheaper, so a lot of the negatives are less critical. Even so much so that today billons of websites use javaScript, including some of the most popular websites you name it and it would be using JavaScript.
What is JavaScipt?
JavaScript is a text-based programming language used both on the client-side and server-side that allows you to make web pages interactive. Where HTML and CSS are languages that give structure and style to web pages, JavaScript gives web pages interactive elements that engage a user.
Incorporating JavaScript improves the user experience of the web page by converting it from a static page into an interactive one. To recap, JavaScript adds behavior to web pages.
What does it do?
JavaScript is mainly used for web-based applications and web browsers. JavaScript is mostly used on the front end of things, but it’s a versatile enough scripting language to be used on back end infrastructure, too. here’s a quick list of the main things JavaScript is used for:
Adding interactive behavior to web pages:
Slide through a carousel of images on the homepage
Zooming in or zooming out on an image
Displaying a timer or count-down on a website
Playing audio and video in a web page
Displaying animations
- Creating web and mobile apps:
Developers can use various JavaScript frameworks for developing and building web and mobile apps. Many companies use Node.js, a JavaScript runtime environment built on Google Chrome’s JavaScript V8 engine. A few famous examples include Paypal, LinkedIn, Netflix, and Uber!
- Building web servers and developing server applications:
Beyond websites and apps, developers can also use JavaScript to build simple web servers and develop the back-end infrastructure using Node.js
- Creating web browser based games:
Ever played a game directly from your web browser? JavaScript probably helped make those.