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並前往https://twitter.com/jaffathecake/status/570872103227953153

Jake Archibald on Twitter: "if (!('visibilityState' in document ...

if (!('visibilityState' in document)) return; A nice way to prevent your JS running in IE<10 and Android WebKit ...

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查詢 「visibilityState」的人也找了：

  1. Visibilitychange
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  2. Page Visibility API
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  3. Page Lifecycle API
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  4. onVisibilityChange
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  5. Pagehide
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  6. Pageshow
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  7. Document hasFocus
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  8. Pageshow event
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