What Is JavaScript?


Besides HTML and CSS, one of the foundational technologies of the World Wide Web is JavaScript. As of 2016, 98% of websites incorporate JavaScript on the client side of web pages and in other third-party libraries. But what exactly is JavaScript? Read on to discover its many applications and learn how to get started. This article outlines some of the most common uses of JavaScript. Hopefully, you will find it useful. Until then, enjoy the benefits of this programming language!

JavaScript was originally designed to bring web pages to life. Scripts are small, text-based programs that are written directly in the HTML of a web page. These programs run automatically when a page is loaded. As long as they are valid, JavaScript is delivered as plain text, which means there is no need for special compilation or preparation. As a result, JavaScript was once called LiveScript, or “the younger brother” of Java.

In JavaScript, variables can be local or global (block-scoped). They can have fixed or alterable values. To define variables, use the var keyword or a variant thereof. In a JavaScript program, you can also declare variables with a specific syntax. For instance, you can use the var keyword to declare a global variable. If it is global, then it is global scoped. If you’re writing a file in the local scope, you can use the ‘block-scoped’ keyword to reference it.

The primary use for JavaScript is making web pages more interactive. The scripting language allows for slides, animations, videos, and music, as well as other features. JavaScript also has the ability to draw information from social media in real-time. This means that even if a browser doesn’t support JavaScript, it will still work for you. So, if you’re a beginner, JavaScript is for you.

JavaScript has expanded far beyond its web browser roots. Today, it’s embedded in a number of software systems that are used for server-side website deployment and non-browser applications. JavaScript engines are the foundation of all conforming ECMAScript implementations. By default, JavaScript values are cast to numbers or strings. However, you can modify the toString function to define it on the prototype. It is also possible to use a toString function on the prototype.

As JavaScript is the most widely used scripting language on the internet, it is not as intimidating as it sounds. In fact, a lot of web features are based on JavaScript. Facebook’s timeline, for example, automatically updates itself on the screen. Google’s suggestion box for searches is another example of JavaScript. So, it’s a good idea to learn a little about it and start making the most of it!

JavaScript is a client-side scripting language that interacts with the DOM (document object model). It is used by 98% of websites and is built into all major web browsers. Andreessen, who coined the term, also wrote the first code. ECMAScript was eventually renamed JavaScript due to trademark reasons and other factors. As of 2015, JavaScript and its various extensions are widely used in the industry.