HTML CSS and JS – What are their differences?

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Nowadays, there is a wide variety of languages that can be used in allow you to design and program a website. Today HTML, CSS and JavaScript are some of the most widely used among programmers around the world. If you are not very familiar with programmingIf you're not sure what the differences are between HTML, CSS and JS, you're probably wondering: What are the differences between HTML, CSS and JS? Below, we will explain in detail what each one is and how to differentiate and use them on your website.

What is HTML CSS and JS?

Before identifying the differences between HTML CSS and JS, it is imperative that we know the characteristics of each. HTML, CSS and JavaScript have become standard web technologies when it comes to programming a site. 

They are recognized as native web languagesThe browsers read your code directly without the intervention of third parties. These codes, together with a good hostingare essential elements in the construction of a website.

Some programming enthusiasts might think that they all serve the same function. However, each functions differently and serves different purposes within web programming. That is why, in we have a specialized team that can help you get the most out of these languages.

Below, we will tell you a little about each of them:


HTML abbreviates the English term "Hyper Text Markup Language". Its English translation is: hypertext markup language. HTML was developed by Tim Berners Lee in 1991 to allow navigation between documents. 

Contrary to popular opinion, HTML is not considered a programming language per se. This is because it does not allow dynamic functionalities to be added to the elements that compose it. However, it is still one of the most widely used languages by programmers around the world.

HTML is actually a markup language used labels to organize the way a given page is displayed. In other words, tags help us to modify the structure and organization of the elements on a web page. 

Due to its immense popularity, this language represents the starting point for anyone interested in web programming. It also serves as a basis for learning other languages useful for web design and programming.


CSS is the abbreviation for "Cascading Style Sheet", which translates into English as: Cascading Style Sheets. It is a language that can be used over the HTML code of a page to customize its final appearance. CSS applies the customization following a priority scheme in a descending way, like a cascade, hence its name.

This language arose in response to the need to simplify web code sheets. Previously, HTML documents were too long and confusing, as they contained the structure and appearance of the site. CSS code arrived to facilitate the work of web designers and developers separating both aspects in different files.

As they are independent documents, it is easier to modify the aesthetic characteristics without affecting the content. In addition, the length of each document is considerably reduced and this makes it easier to identify errors or code problems. For this reason, CSS is one of the most widely used tools for customizing the appearance of websites.


JavaScript is a programming language that makes it possible to include complex functions in web sites using scripts. JS (as it is often abbreviated) was developed by Brendan Eich for Netscape and was released in 1995. Although initially intended to improve web programming, JavaScript is now used for a variety of purposes.

JS is the most frequently used language for programming dynamic web pages. These are all those pages whose content changes according to the interactions that the user performs on them. Facebook, Twitter, Google Analytics and YouTube are some examples of sites that use Javascript to execute most of their functions.

What features differentiate HTML CSS and JS?

Differences between HTML CSS and JS

Having known a little about each of the technologies, it is easier to define what characteristics differentiate HTML CSS and JS from each other. It is important to clarify that although each language exists independently of each other all complement each other. This is because each technology is involved in a different aspect of web design and programming. 

Although HTML and CSS languages can be very similar, each has a different purpose. The way the code of both technologies is written is different, as each is responsible for different areas. HTML works to create the structures of pages, while CSS customizes their appearance.

HTML documents can stand alone, while CSS sheets must be linked to the latter to work. Both technologies are compatible with JavaScriptwhich would complement the structure and appearance already created.

JavaScript is the only one of the three that is considered a programming language. This is because it intervenes directly in the functionality of the pages and not only in their structure or aesthetics. As it is an independent language, the way of writing its code varies quite a lot in relation to the other two.

How do HTML CSS and JS work on your website?

In the case of HTML, its main function is to define the structure of the web pages. This technology makes it possible to divide content into paragraphs, create headings, insert links, tables, images and even videos. You could say that the HTML code is a kind of skeleton on which the website is built.

Following the previous example, CSS would be the appearance of our website, a skin that can be modified. The CSS code allows change all aesthetic values pages to give them a unique style. By using it, designers can more easily customize font types, font sizes, colors and more.

Finally, JavaScript takes care of add dynamism and greater functionality to web pages. With this language it is possible to manage more efficiently the data sent and received by your website. It also allows pages to react, change and update as the user interacts with them.

Knowing the differences between HTML CSS and JS you have the basics to ensure the correct execution of each and the reason why it is necessary to use them. So, if you add to that a optimization controlled your site, you will have a user-friendly web space.

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