Hi, 
In section "Processing the image candidates", the srcset spec [1] says: 

"The user agent may at any time run the following algorithm to update an img 
element's image in order to react to changes in the environment. (User agents 
are not required to ever run this algorithm.)" 

The RICG is wondering why this is not at least a SHOULD or a MUST? Most 
developers would expect this to work like media queries (i.e., always 
"responsive" to environmental changes). 

Some clarification would be great. 

Kind regards,
Marcos

PS: the srcset spec does not yet have a component in Bugzilla. Would be great 
to be able to file bugs there on this spec. 

[1] http://dev.w3.org/html5/srcset/#processing-the-image-candidates 



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