如何检测浏览器窗口是否关注？ [英] How can I detect whether a browser window is focused or not?

问题描述

仅当窗口在后台时，我的页面才会发出通知声音。我可以跟踪 window.onfocus 和 window.onblur 事件，以便在焦点状态发生变化时注意。但是，我不知道窗口是否会加载焦点，例如，因为它可能会加载到背景选项卡中。

My page should make notification sounds only when the window is in the background. I can track the window.onfocus and window.onblur events to notice when the focus state changes. However, I don't know whether the window will load focused or not, since it might load in a background tab, for instance.

我如何决定是否播放在我得到 onfocus / onblur 事件之前听到与否？

How do I decide whether to play sounds or not before I get an onfocus/onblur event?

推荐答案

难道你不能假设它被加载模糊，然后在收到任何类型的事件（keydown / mousemove）后立即将状态更改为焦点吗？

Couldn't you just assume it's loaded blurred, and then change the status to focused as soon as you receive any type of event (keydown/mousemove)?

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