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CSS

Posted by rahi
rahi
4,714 Points

Is there a problem if I add a comma in a css declaration

Hello team Treehouse,

I keep typing commas in my css declarations. For example:

nav {
  text-align: center; 
  padding: 10px, 0;
  margin: 20px, 0, 0;
}

What am I telling the browser if I add commas like this? Or, why is this syntax incorrect?

Sorry, very newbie question.

2 Answers

David Chordigian
David Chordigian
Courses Plus Student 12,227 Points

Hey Rahi,

Check out this old post below. It should answer your question. But mainly commas are used in CSS to group "Selectors" together to have the same styles to each class or id you create.

https://teamtreehouse.com/forum/css-when-to-use-a-comma

Hope this helps you out!

rahi
rahi
4,714 Points

Thanks David, the post you shared was just the explanation I needed.

Andrew Dushane
Andrew Dushane
9,264 Points
Andrew Dushane
Andrew Dushane
9,264 Points

You can't use commas in that way. The reason is that it won't work - CSS is looking for white-space separated values, not comma-separated values. There are uses for commas in CSS - you'll use them a lot for grouping selectors, for example. You just have to follow the rules basically. In this case, there's only one way to write the list of values for padding and margin. http://www.w3.org/community/webed/wiki/CSS/Properties/margin

rahi
rahi
4,714 Points

Thanks Andrew.