User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36 Steps to reproduce: Visit this page: http://www.impressivewebs.com/minheight-bug.html Or do the following: 1. Create a parent box holding a child box. 2. Give the parent a min-height value, or let the parent element expand naturally due to other content. 3. Give the child position: relative then top: 50% (or other percentage value) Actual results: The child box stays at the top. Expected results: The child box should be positioned some distance from the top (50% of the height of the parent element, in accordance with the spec). NOTE: If you change the min-height value to a "height" value, the problem is corrected. But if you replace the min-height with content that creates natural height, the problem persists. BROWSERS NOTE: All browsers I tested have the same behaviour (Stable Chrome, Chrome Canary, IE10, Safari 6.1) except Opera 12.16, which correctly positions the box using top: 50%.
Confirming. Though - as noted - MSIE 11/Chrome behave as Gecko/Firefox. FWIW, it works with "position: absolute;" set.
Component: Untriaged → Layout
Product: Firefox → Core
Status: UNCONFIRMED → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → DUPLICATE
Summary: percentage values for top and bottom not honored when parent has min-height or no height set → percentage values for top and bottom on relatively positioned element not honored when parent has auto height
Duplicate of bug: 260348
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