What Is JavaScript?


JavaScript is a programming language that is used to make websites more dynamic and interactive. It is most often seen in web pages, but it can be found in other places as well, including apps and games.

When Is JS Useful?

JS is an interpreted programming language, which means it does not have to be compiled and runs directly within a browser. This makes it a very fast and reliable way to create websites.

It’s also incredibly versatile and can be paired with other languages to create more complex projects. This makes it a popular choice for many developers, especially those looking to get started in the field.

How Does JS Work?

Scripts are programs written in HTML that can be executed by a web browser as the page is loaded. This can help reduce load times by allowing sites to run immediately in the browser, reducing the need for a server to handle the data.

Some of the most common functions for JS include image carousels, media playing and displaying countdowns and timers. It can also be used to create interactive forms, so visitors can interact with the site and submit information.

How Does JS Differ from Other Programming Languages?

Unlike other languages, JS doesn’t have an explicit type system, so its true types aren’t known until runtime. This can lead to a few potential issues when using JS in your code, including missing types or undefined errors.

Another difference is that JS’s code is order-sensitive, which means that when you encounter a block of JS code, it will process it in the order that it appears. This can make it easier to read and understand, but it can also cause problems when variables aren’t referencing each other properly.

This can be a good thing, but it’s important to know that JS is not a pure object-oriented language like Python or C#. It’s also single-threaded, meaning that JS can only run one instruction at a time and cannot handle multiple jobs at the same time.

Why is JS More Secure?

JS is more secure than other languages because it has no direct access to the operating system, meaning that a malicious webpage can’t read or write files on the user’s computer. This can prevent hackers from stealing or destroying private information and damaging the computer’s hardware.

The security of JS is further enhanced because it’s a text-based language, which means that it doesn’t need to be compiled in a special program before running. This makes it easy to manage and maintain, and also helps ensure that your website is safe for use by others.

Why Do Big Companies Shift Their Code Base to JavaScript?

Many large companies are re-writing their servers and replacing them with a more secure programming language like JavaScript. This is because a security breach can leave the company exposed and vulnerable, and because it’s a more accessible alternative to other languages that require more coding expertise.