Open qq99 opened 10 years ago
This URL: https://developer.mozilla.org/en-US/docs/Web/Guide/User_experience/Using_the_Page_Visibility_API?redirectlocale=en-US&redirectslug=DOM%2FUsing_the_Page_Visibility_API
Resulted in this:
This URL: https://developer.mozilla.org/en-US/docs/Web/Guide/User_experience/Using_the_Page_Visibility_API?redirectlocale=en-US&redirectslug=DOM%2FUsing_the_Page_Visibility_API
Resulted in this:![screen shot 2014-03-26 at 4 11 31 pm](https://cloud.githubusercontent.com/assets/150352/2530092/dae3aade-b522-11e3-9cdc-b9426282928f.png)