Validation

CSS validation is the process of checking whether a set of CSS rules conforms to the syntax and rules defined by the CSS specification. There are various tools available that can help you validate your CSS code. Here are some of the most popular options:

1. W3C CSS Validation Service: This is a free online tool provided by the World Wide Web Consortium (W3C), which is the organization that develops and maintains the CSS specification. You can simply copy and paste your CSS code into the validation tool and it will check for errors and provide suggestions for fixing them.
2. CSSLint: This is a free and open-source tool that checks your CSS code for potential errors and bad practices. It not only checks for syntax errors but also for performance issues, accessibility, and browser compatibility.
3. Stylelint: This is another open-source tool that checks your CSS code for potential errors and inconsistencies. It also provides suggestions for fixing issues and has support for modern CSS features such as grid layout and custom properties.
4. IDEs and text editors: Many popular IDEs and text editors have built-in CSS validation features, such as Visual Studio Code, Sublime Text, and Atom. These tools will highlight syntax errors and provide suggestions for fixing them in real-time as you write your code.

It’s important to note that CSS validation is not a guarantee that your CSS will work perfectly across all browsers and devices. However, it can help you catch errors and improve the overall quality of your code.