24 lines
614 B
CoffeeScript
24 lines
614 B
CoffeeScript
Polyfill =
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init: ->
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Polyfill.visibility()
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visibility: ->
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# page visibility API
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return if 'visibilityState' of document or not (
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prefix = (
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if 'webkitVisibilityState' of document
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'webkit'
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else if 'mozVisibilityState' of document
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'moz'
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)
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)
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property = prefix + 'VisibilityState'
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event = prefix + 'visibilitychange'
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d.visibilityState = d[property]
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d.hidden = d.visibilityState is 'hidden'
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$.on d, event, ->
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d.visibilityState = d[property]
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d.hidden = d.visibilityState is 'hidden'
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$.event 'visibilitychange'
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