CSS and HTML Basics

ByOscar Gonzalez Published on: Updated on: Systems Administration Blog Reading Time: 1 minute

I've been spending some time recently helping people out with their websites and I thought I'd post a few tips on CSS basics.

Let's cover the difference between ID and Class when we're talking about CSS.

IDs...

  • IDs should be unique per page.
  • IDs are selected with the "#" symbol

Classes...

  • Classes can be shared, multiple elements can have the same class.
  • Classes are selected with the "." (period)

You can combine them and select a class and a specific id.

Use Firebug to help you debug your website on the fly, then transfer the changes to your style.css (or other) stylesheet.

Further (and better) reading:

  • The Difference between ID and Class.
  • Selector reference guide:
  • Multiple ID & Class selectors:
Oscar Gonzalez

Oscar Gonzalez is an IT and Web veteran with over 20 years of experience working in marketing, technology, and infrastructure, seeking, designing, and implementing solutions for businesses and individuals.

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