Introduction to JavaScript

JavaScript is a high-level, interpreted programming language that is widely used for front-end web development and can also be used for server-side programming. It is a client-side scripting language, which means that JavaScript code is executed on the client side, within a web browser. JavaScript is an object-oriented language, which means it uses objects and their properties and methods to perform tasks.

One of the main strengths of JavaScript is its ability to interact with HTML and CSS to create dynamic and interactive web pages. JavaScript can be used to change the content, layout, and styles of a web page in real-time, without requiring a page refresh. This provides a smooth and responsive user experience and makes it possible to create dynamic and interactive web applications.

JavaScript is also widely supported across all major web browsers, including Google Chrome, Mozilla Firefox, Internet Explorer, and Apple Safari, making it a universal language for web development. It is also a relatively easy language to learn, especially for those who have some prior experience with programming.

JavaScript Usages

Validating user input and providing immediate feedback so helps improve the website response time. If JavaScript was not there the validation would have to be done on the server.
Changing the HTML or the style of the web page elements dynamically.
Hide/Display elements conditionally
Display messages

Set Up

There is not much set up required to run the JavaScript code as most of the browsers can compile/interpret and run the JavaScript directly. A text editor and browser is the minimum required which is probably already installed on your computer.

If you prefer you can install and use Visual Studio Code (VS Code) for code editing.

Next: JavaScript Variables and Data Types

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