I influenced from StackOverflow Chat.
Here when the page is inactive then number of the new incoming chat messages are displayed in the Page title. When the page is activated the this number is disappeared. How can I implement this concept in my application? I also want to highlight that window.
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):
问题:
回答1:
detecting when it goes inactive can be done with 'window.onblur' (the onblur event)
detecting when it goes active again can be done with 'window.onfocus' (the onfocus event)