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Tip: Explore the Difference Between ID and Class

Learn the difference between ID and Class in CSS notation.


These two selectors often confuse beginners. In CSS, the difference between them is that the class is represented by a dot ".", while ID is represented by a hash "#".

In a nutshell ID is used on a style that is unique and it doesn't repeat itself, but the class can be re-used.


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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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