How does JavaScript code work? JavaScript is either embedded directly in a web page or referenced via a separate .js file. When a user visits that web page, his browser executes the script along with the HTML and CSS code and creates a functional Laos Phone Number Data page using that code that is displayed through the browser tab. The script is downloaded to the visitor's machine and processed there, which is different from server-side languages, in languages where server-side compilation takes place, the script is processed on the server side before being sent to the browser. When a block of Java Script code is encountered, a web browser processes it from top to bottom. Since it is order sensitive, refer to the objects or variables inside the block first before modifying. Having variables without a value results in an undefined error.
The difference between JavaScript and other programming languages JavaScript is one of the most popular programming languages because it is versatile. Many developers find it to be their primary choice unless they need specific functionality that JS doesn't provide. Let's take a look at some of the most popular programming languages: The difference between JavaScript and C# C# is an object-oriented language for building programs that run in the .