On 2/25/10 6:58 PM, Brad Kemper wrote: > So you're not worried about people using this as a UA-selecting hack? Any selector that one UA implements and another does not can be used as a UA-selecting hack, no? The only way to deal with worrying about it is to never ever add any new selectors. > body { rules for most UAs' body tag } > :any(html) body { rules for this version of firefox or higher's body tag } Someone who really wants to today can do: body { rules for most UAs' body tag } body, #x:not(#x):-moz-handler-disabled { rules for gecko 1.9.1 or 1.9.2 or 1.9.3 (or maybe later) } body, #x:not(#x):-moz-lwtheme { rules for gecko 1.9.2 or 1.9.3 (or maybe later) } body, #x:not(#x):-moz-handler-crashed { rules for gecko 1.9.3 (or maybe later) } Or they can do: body { rules for older UAs' body tag } body, #x:not(#x):nth-child(1) { rules for UAs that support nth-child } or various similar things. As long as there are _any_ selector differences between browsers, including any vendor extensions, they can be used this way. Now the caveat for authors is this can be fragile with the nonstandard properties (hence the "or maybe later"s above). We obviously reserve the right to drop any -moz-whatever selector any time. In practice, I haven't seen many authors doing this sort of thing. -BorisReceived on Friday, 26 February 2010 04:42:28 UTC
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