Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS How to Make a Website CSS: Cascading Style Sheets Center the Wrapper

Posted by robinbehroozi
robinbehroozi
15,912 Points

What does auto do?

wrapper {

    max-width:940px;
margin:0 auto;

}

Hey, Does anyone know what the auto does? Does it centre the div with the id wrapper on the page? Thanks.

3 Answers

Alex Cawley
Alex Cawley
9,291 Points

since it is the second value on the margin it sets the left and right values to auto. That makes the two margins (left and right) to exactly the same therefore centering the wrapper in this case.

Noel Gonzalez
seal-mask
.a{fill-rule:evenodd;}techdegree
Noel Gonzalez
Full Stack JavaScript Techdegree Student 5,130 Points
Noel Gonzalez
.a{fill-rule:evenodd;}techdegree
Noel Gonzalez
Full Stack JavaScript Techdegree Student 5,130 Points

It resets the <div> wrap.

robinbehroozi
robinbehroozi
15,912 Points
robinbehroozi
robinbehroozi
15,912 Points

thank you Alex