A related standard proposal for HTML based resources can be found at https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/ResourcePriorities/Overview.html Adding similar capabilities to CSS based resources, and especially background images and fonts (mainly for icon fonts), can be extremely useful for similar use-cases. In the Resource Priorities proposal the 'lazyload' attribute is used as a hint rather than a directive, and user agents should treat it as low priority resource (and load it after the other resources), but may load it regardless of its visibility (e.g. to avoid waking up the radio on mobile at a later phase). The only binding part in the Resource Priorities proposal is that 'lazyload' resources don't block the page's onload event. It seems logical to apply similar rules to CSS based resources that are marked for lazy loading.
Received on Tuesday, 2 July 2013 11:22:32 UTC