<!DOCTYPE html> <style> span { color: green; } #foo span { color: red; } </style> <div id="foo"> <span></span> </div> <div> <!-- Trigger a style sharing cache miss and Bloom filter update, in a way that will add an style sharing cache entry our second span can't match --> <div></div> </div> <div> <span>This should be green</span> </div>