What Is JavaScript?

JavaScript is a language that’s used to create interactive web pages. It’s used by most modern browsers and can be a great way to enhance your website. It also works on mobile devices like Android and iPhone.

What Is JavaScript?

JS is a powerful and flexible programming language that’s been around for quite some time. It’s used for creating websites, apps, games, and more. It’s one of the most popular languages out there and is widely used in many industries.

What Would the Web Look Like Without JS?

Most of the dynamic features you see on a page are made possible by using JavaScript. That’s because it’s a language that lets you write code to add extra content, make things clickable, and even change the color of elements.

The main advantage of using JS is that it’s client-side. That means it’s written directly into the HTML file on your computer instead of having to download a program or compiler before you can use it. This makes it much easier for web developers to work with.

What’s the Difference Between Server-Side and Client-Side JavaScript?

A lot of people are confused when it comes to the differences between client-side and server-side JavaScript. This is because many people think that both types of JavaScript are identical.

To clarify, though, client-side and server-side JavaScript are different in that they both work on the same page. The only difference between them is that client-side JavaScript is run when the user views the page, while server-side JavaScript is a program that’s uploaded and run on a server to display the page.

Scripts are loaded and executed in the order they appear on the page. This can cause issues when trying to manipulate a DOM object, as the script may try to load and parse elements that haven’t been added to the DOM yet. To avoid this, you’ll need to load your JavaScript after all the HTML has been loaded and parsed, which is why most developers prefer to place their scripts in the last element on a page.

How Does Scripting Work?

When a browser receives a script, it runs it to ensure that it works and to verify that it’s not malware or spyware. It then creates an Abstract Syntax Tree (AST), which contains the code. This is then translated into machine code and submitted for execution.

The AST can be translated to machine code by either a compiler or an interpreter. A compiler works before the page is loaded and can help speed up the execution of the code, but it also takes some up-front work. On the other hand, an interpreter can start immediately and be much faster than a compiling process.

There are many ways to load and execute scripts on a page, but if you need to do something right away or have any dependencies, you’ll want to use the async attribute. If you want to wait for all the HTML on the page to load before you begin, you’ll need to use the defer attribute.