Validation is the process of checking something against a rule. When
you are a beginner, it is very common that you will commit many mistakes
in writing your CSS rules. How you will make sure whatever you have
written is 100% accurate and up to the W3 quality standards?
If you use CSS, your code needs to be correct. Improper code may cause unexpected results in how your page looks or functions.
But if you want to validate your CSS style sheet embedded in an (X)HTML document, you should first check that the (X)HTML you use is valid.
Tool to check the validity of (X)HTML document: Validate (X)HTML document.
You can use the following tools to check the validity of your CSS.
If you use CSS, your code needs to be correct. Improper code may cause unexpected results in how your page looks or functions.
But if you want to validate your CSS style sheet embedded in an (X)HTML document, you should first check that the (X)HTML you use is valid.
Tool to check the validity of (X)HTML document: Validate (X)HTML document.
You can use the following tools to check the validity of your CSS.
Why Validate Your HTML Code?
There are a number of reasons why you should validate your code. But major ones are −- It Helps Cross-Browser, Cross-Platform, and Future Compatibility.
- A good quality website increases search engine visibility.
- Professionalism: As a web developer, your code should not raise errors while seen by the visitors.
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