How to determine which grid option is currently used
问题 I use Bootstrap 3 for a web page that is created using PHP and HTML. With the responsive grid and classes on Bootstrap 3 you can assign multiple classes to a div to define different widths depending on the current screen size - exmaple: <div class="col-lg-3 col-md-3 col-sm-4 col-xs-6">...</div> This refers to the screen size using col-lg for large devices, col-md for medium devices, col-sm for small devicesand col-xs for extra small devices. It works as intended but I am wondering how I can