only

英[ˈəʊnli] 美[ˈoʊnli]

adj.Only; only; the best, the most appropriate

adv.Only, just; the result is, unexpectedly

conj.But, but;if it were not

focusable

focusable

Bootstrap sr-only-focusable style syntax

Function: Used in combination with the .sr-only class, displayed when the element gets focus (such as: users operating the keyboard)

Bootstrap sr-only-focusable style example

    php中文网(php.cn)    

  
 
实例
 
 .sr-only 类除了屏幕阅读器外，其他设备上都隐藏元素:
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与 .sr-only 类结合使用，在元素获取焦点时显示(如：键盘操作的用户):
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