23 lines
601 B
CoffeeScript
23 lines
601 B
CoffeeScript
Polyfill =
|
|
init: ->
|
|
Polyfill.visibility()
|
|
visibility: ->
|
|
# page visibility API
|
|
return if 'visibilityState' of document
|
|
return unless prefix = (
|
|
if 'webkitVisibilityState' of document
|
|
'webkit'
|
|
else if 'mozVisibilityState' of document
|
|
'moz'
|
|
)
|
|
|
|
property = prefix + 'VisibilityState'
|
|
event = prefix + 'visibilitychange'
|
|
|
|
d.visibilityState = d[property]
|
|
d.hidden = d.visibilityState is 'hidden'
|
|
$.on d, event, ->
|
|
d.visibilityState = d[property]
|
|
d.hidden = d.visibilityState is 'hidden'
|
|
$.event 'visibilitychange'
|