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css - Center text in div?

I have a div 30px high and 500px wide. This div can contain two lines of text one under the other, and is styled (padded) accordingly. But sometimes it only contains one line, and I want it to be centered. Is this possible?

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To center horizontally, use text-align:center.

To center vertically, one can only use vertical-align:middle if there is another element in the same row that it is being aligned to.
See it working here.

We use an empty span with a height of 100%, and then put the content in the next element with a vertical-align:middle.

There are other techniques such as using table-cell or putting the content in an absolutely positioned element with top, bottom, left, and right all set to zero, but they all suffer from cross browser compatibility issues.


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