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Nov 09, 21  |  Sharjeel Ashraf

Web Design Layers: What, Why, And How?

Do you know that website design consists of three different layers? It is not a single template but a mixture of layers. 

In this article, we will discuss different web design layers and how they can help you create the structure, style, and behavior that you want to inculcate in your website.

Let’s learn more about web design layers in detail.

What are the Three Web Design Layers?

The three different web design layers needed for creating a complete website from scratch.

HTML - Layer for Structuring 

The structure layer of any website is the underlying HTML code. Just like a building requires a brick or an iron structure for its foundation, a website requires proper code in HTML for its foundation.

The structure layer includes all the content including text, videos, and images that the visitor will see on the website. Moreover, it also includes scripts, CSS (styling sheets) and even hyperlinks that visitors will use to navigate around the website. Similar to building design code, websites also follow a standard for compliance. The coding standard for websites is W3C website development standard.

HTML also ensures that the website content is visible to visitors that have turned off JavaScript and CSS on their browsers. 

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CSS: Layer for Styling

Next layer is the styling layer. This layer consists of CSS or Cascading Styling Sheets. The layer is responsible for designing the website layout over the structure - HTML structure of the website.

CSS can be in-line, meaning on the same file and in-between code, or on a separate file. If the CSS code is on a separate file, it needs to be connected with the main HTML code through coding script. The style layer includes media queries that change a site's display based on screen size and device.

You can use multiple stylesheets, but every CSS file requires an HTTP request to fetch it, affecting site performance. 

JavaScript: Layer for Behavior & Actions

What will the visitor do when he/she visits a website? JavaScript is also called the behavior layer and it is used for interacting with others.

JavaScript uses user actions to set conditions and is mostly used as scripts within the HTML code. 

Often, the behavior layer also includes backend languages like PHP, Python, Ruby on Rails, or any other programming languages that require connectivity with the server. 

JavaScript is the only layer that is activated in the browser after the site is loaded. That is why it is the only layer that can be loaded after Document Object Model (DOM) loads. 

Developers mostly used external scripts on a web page to keep its performance intact. Using in-line JavaScript can reduce site performance, lead to more server responses, and take more site-bandwidth. 

>>> Mobile ERP Benefits: How Enterprises Should Adopt It?

Should You Separate Website Design Layers? And Why?

When developing a web page, the structure should be handled by HTML, visual styling by CSS, and behaviors by JavaScript. These all should be put in separate files to ensure that your website runs smoothly and has optimum performance. A few reasons to separate website design layers are:

  1. Helps Segment Resources

When you create an external CSS or JavaScript file, it may be used by any page on the site. If you make a modification to that file, for example, to update any typographic styles on the website, the change will be applied to all pages that utilize that stylesheet. There is no need to manually change each page of the website, which might be a time-consuming task for a large website.

  1. Better Server Connectivity

After your consumer downloads the script or style sheet for the first time, the web browser caches it. Because these shared resources are already in the browser cache, subsequent sites requested by the browser load faster, improving overall page speed and performance.

  1. Accessibility

People and browsers may now access external style sheets and script files. Screen readers, for example, may digest material from the structural layer more quickly since they don't have to deal with styles that they can't utilize anyhow.

  1. SEO

A site with a clear separation of style and structure is more likely to do well in search engines because search engines can scan the content more effectively and comprehend the page without being bogged down in visual-style and behavior information.

  1. Backward Compatibility

A site built using different development layers is more likely to be backward-compatible since browsers and devices that cannot utilize particular CSS styles or have JavaScript disabled may still access the HTML.

Find Top Website Developers for Your Project

At Distinguished.io, b2b ratings and reviews platform, we have the best website development companies online. 

Whether you want to develop a website, an ecommerce store, or a web app, these website development experts are the best for the job. 

Learn more about these website development services online by visiting the top website development companies page on our platform.



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