如何使用JavaScript检测Twitter Bootstrap 3的响应断点？(How to detect responsive breakpoints of Twitter Bootstrap

目前 ，Twitter Bootstrap 3具有以下响应断点：768像素，992像素和1200像素，分别代表小型，中型和大型设备。

如何使用JavaScript检测这些断点？

我想用JavaScript来监听屏幕更改时触发的所有相关事件。 并且能够检测屏幕是否适用于小型，中型或大型设备。

有没有事情已经完成了？ 你有什么建议？

Currently, Twitter Bootstrap 3 have the following responsive breakpoints: 768px, 992px and 1200px, representing small, medium and large devices respectively.

How can I detect these breakpoints using JavaScript?

I would like to listen with JavaScript for all related events triggered when the screen change. And to be able to detect if the screen is for small, medium or large devices.

Is there something already done? What are your suggestions?