Developing web applications and solutions is a tough gig, to say the least. You need to negotiate close deadlines, last-minute changes, and long working hours just so your brainchild can blossom.
But that’s not the end of your worries. Increasing competition in the market means firms try to move faster, getting more work done in less time. In such a situation, utilizing online resources becomes necessary for web developers to keep up with the industry demands.
In this post, we will talk about CSS validation: what it is, why it matters for web developers, and the tools required to make this process a lot easier.
What is CSS Validation?
CSS validation is a process to look for syntax errors, spelling mistakes, or other types of mistakes made while developing the code.
But because manual validation takes too much time, we now have validation tools that can automate this process. Hence allowing developers to make the changes quickly and efficiently (more on this later).
Why is CSS Validation Important for Web Developers?
There are many reasons why CSS Validation is significant for web developers. We will mention some of them in detail below.
Getting Maintainable, Error-free Codes
The validation process makes your codes free from problems like missing semicolons, braces, etc. These small fixes can, overall, boost your website’s performance, enabling developers to reap the rewards of their efforts.
Secondly, error-free codes allow easy maintenance or upgrading of scripts as other team members can chip in nicely with their ideas.
Enhancing Cross-Browser Compatibility
A valid CSS Code ensures that your site renders flawlessly across a variety of devices and web browsers. This improves the overall user experience, engaging and attracting more organic visitors to your platforms (in a way, boosting your platforms’ SEO!)
Instilling Good Coding Practices
When you validate your CSS files, you learn how errors are made. This prompts you to think, “How did I get these errors in the first place?”
As a junior web developer, you start solidifying your A B C’s, and the seniors can be reminded of their foundations. Hence, with fewer mistakes, workflows can become smoother, allowing you to complete tasks on time and meet tight deadlines.
Complying with Legal and Ethical Standards
CSS code validation ensures that your website is compliant with legal and ethical standards. For instance, during the validation process, you can resolve issues with screen readers, ensuring compliance with standards like WCAG.
Future-Proofing of Code Files
Finally, validating Cascading Style Sheets allows you to future-proof files so that you don’t need to rewrite them from scratch as technologies evolve around us.
Plus, maintainable, error-free codes written with all the good coding practices depict professionalism in work, impressing others in the industry.
How to Validate Cascading Style Sheets?
So far, we have seen the reasons why CSS validation matters for web developers. Now, we will learn the validation process in detail.
Find a Robust CSS Validator Tool
Do you know the saying, “The first step is often the most difficult one to take?” Well, this is true in our case because, nowadays, finding a free and reliable CSS validation tool is very hard.
However, there is no need to worry as we scavenged the depths of the internet to come across the following worthwhile options:
If we are to pick the best tool out of these three, we would go for the third option, the CSS Validator by Minifier.org. There are various reasons behind this selection and preference. It’s free, easy to use and doesn’t have any limit or quota of usage. However, this is a personal preference, and you are free to choose your tool according to your convenience.
Upload the Script
In continuation of our previous thought, we will show you the procedure of validating a CSS script using the third tool on the list.
The uploading part is simple: Copy-paste into the tool’s interface and press ‘Validate’ to continue. For demonstration, we will use the following file:
Invalid CSS:
body {
background-colour: #fafafa; /* Error: ‘background-colour’ should be ‘background-color’ */
font-famly: 'Arial', sans-serif; /* Error: Typo in ‘font-family’ */
margin: 20px
padding: 10px;}
h1 {
color: #333;
font-size: 2em;
text-align: centre; /* Error: ‘centre’ should be ‘center’ */}
.container {
width: 100%; /* Error: ‘width’ misspelled */
display: blok; /* Error: ‘block’ misspelled */
border: 1px solid #ccc;
background: rgba(255, 255, 255, 1.2); /* Error: RGBA alpha must be between 0 and 1 */}
button {
padding: 10px 15px;
color: white;
background-color: blue;
border-radius: 5px
transition: all 0.3s ease-in-out; /* Missing semicolon above */}When we uploaded this code to the CSS Validator, the following is a list of errors that we received:
| Line | Column | Types | Desc | Message |
| 2 | 3 | warning | Properties should be known (listed in CSS3 specification) or be a vendor prefixed property. | Unknown property “background-color”. |
| 3 | 3 | warning | Properties should be known (listed in CSS3 specification) or be a vendor prefixed property. | Unknown property “font-family”. |
The snapshot could only cover a glimpse of the problems, but you get the idea. Besides warnings, there were also errors in the dummy script, which would disallow the code to be compiled at run-time, causing trouble and frustration for the web developer.
Make the Identified Changes
The last step is to make the identified changes to make the code error-free in no time. For that, there are many tools available online, but we suggest doing this part by yourself to ensure accuracy.
For instance, we corrected the above script to make it free of problems. You can review the code below for your convenience:
Validated CSS:
body {
background-color: #fafafa;
font-family: 'Arial', sans-serif; /* Fixed typo in ‘font-family’ */
margin: 20px;
padding: 10px;
}
h1 {
color: #333;
font-size: 2em;
text-align: center;
}
.container {
width: 100%; /*Fixed the spelling of ‘width’ */
display: block; /* Fixed the spelling of ‘block’ */
border: 1px solid #ccc;
background: rgba(255, 255, 255, 1); /* Alpha fixed to be within 0–1 range */
}
button {
padding: 10px 15px;
color: white;
background-color: blue;
border-radius: 5px;
transition: all 0.3s ease-in-out;
}Validating this script with the said tool shows some warnings; however, nothing critical that could damage your workflow:
| Line | Column | Types | Desc | Message |
| 14 | 1 | warning | Assure properties are in alphabetical order | Rule doesn’t have all its properties in alphabetical order. |
| 17 | 3 | warning | Don’t use width or height when using padding or border. | Using width with border can sometimes make elements larger than you expect. |
| 18 | 3 | warning | For older browsers that don’t support RGBA, HSL, or HSLA, provide a fallback color. | Fallback background (HEX or RGB) should precede RGBA background. |
| 21 | 1 | warning | Assure properties are in alphabetical order | Rule doesn’t have all its properties in alphabetical order. |
Finally, our procedure of validating CSS files comes to a close. As evident, using validation tools helps you get through your work quickly and build projects with more efficiency and accuracy.
Final Words
CSS validation is a crucial practice for web developers, ensuring error-free code that enhances performance and user experience across different browsers.
By using automated validation tools, developers can quickly identify and resolve different errors, ensuring compliance with legal and ethical standards.
This not only future-proofs your codes but also allows for smoother collaboration within teams. Thus streamlining your workflow and boosting productivity to meet the modern-day industry standards.
Expert in Marketing Strategy and Brand Recognition
Jemin Desai is Chief Marketing Officer at Positiwise Software Pvt Ltd, he is responsible for creating and accelerating the company’s marketing strategy and brand recognition across the globe. He has more than 20 years of experience in senior marketing roles at the Inc. 5000 Fastest-Growing Private Companies.
