What Is JavaScript?


You won’t get very far in the world of tech without running smack into javascript. Whether you’re learning to code or just curious about what it’s all about, this programming language is one of the most powerful on the web and beyond. Often used in conjunction with HTML and CSS, javascript adds dynamic functionality to a website or web application.

Most web developers start their coding journey with HTML and CSS. Once they’ve got the structure and aesthetic down, javascript is the magic ingredient that makes things truly interactive. It’s what enables websites to create drop-down menus, display data in real time, and even update content without users having to refresh the page.

Unlike other languages such as C and C++, which must be compiled into machine code before they can be executed, JavaScript runs natively in the browser (or on the device). This is because it’s a high-level language that provides abstraction over the hardware and operating system. It also uses garbage collection and a dynamic typing system, meaning that variable types are associated with runtime values instead of being assigned at compile time.

This allows for fast execution and reduces the amount of memory needed to run it. It also helps make javascript more readable and maintainable. While it may look complex, javascript is actually quite simple and easy to learn. It’s also faster than many other programming languages, which means that a site built with javascript will typically load more quickly and provide a better user experience.

Another benefit of javascript is that it can communicate with server-side programs. This is done by sending a small piece of data between the JavaScript program and the program that’s on the other end of the connection. The program on the other end analyzes the data to anticipate what search terms might be entered, and it then displays suggestions to the user as they type.

Lastly, javascript can track user input and perform various actions on the client side. It can, for instance, automatically advance a slideshow or presentation to the next slide after each click. It can also create animations and transitions between different images in a carousel or other UI element.

The majority of websites use javascript. It’s the glue that holds together the skeletal structure (HTML) and the visual style (CSS). It’s also responsible for the interactive utility of most popular apps and websites, such as image editors, project management tools, calculators, and chatbots like ChatGPT. Keeping tabs on javascript can help you understand what’s impacting your webpage’s performance. You can use tools such as Semrush and Google Search Console to detect jscript errors on your pages. To keep your website’s jscript functioning properly, be sure to stay updated with the latest changes in the ECMAScript standards.