User Agent: Mozilla/5.0 (Windows NT 6.0; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 Build ID: 20140917194002 Steps to reproduce: set a new image map for an image and also start a CSS transition http://jsfiddle.net/o2L4jg51/ Actual results: the css transition gets skipped Expected results: it should not
Status: UNCONFIRMED → NEW
Component: Untriaged → Layout
Ever confirmed: true
Keywords: reproducible, testcase
OS: Windows Vista → All
Product: Firefox → Core
Hardware: x86_64 → All
Changing the value of usemap is a pretty rare occurrence, so it recreates the CSS box (to enable some optimizations and simplifications when there is no imagemap). But in the testcase here, that means that the reframe computes initial style and the transition never starts. This comes back to the general problem of "when transitions actually start and when style is computed is undefined"...
Component: Layout → CSS Parsing and Computation
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