Sparse tilesets have lots of 404s, and so pose two problems: parent tiles are not pulled out of the DOM when their children have failures, and 404 tiles themselves look weird.
This would be simple if we didn't consider IE7, which has 1-5% market share, so is barely worth considering.
Anyway,
The options are:
data-urls (break in IE7! with broken image icon yay)
a real blank image? kill me now
non-image elements
managing 404s in another queue or something (IE7 has no right to introduce complexity here)
display:none, with extra magic to make it sticky in positionTile
Sparse tilesets have lots of 404s, and so pose two problems: parent tiles are not pulled out of the DOM when their children have failures, and 404 tiles themselves look weird.
This would be simple if we didn't consider IE7, which has 1-5% market share, so is barely worth considering.
Anyway,
The options are:
positionTileThe final option is