It completely depends upon the usage. In bootstrap you can implement buttons using combination of <a> and <i> . Similarly , in font-awesome ... ... <看更多>

Many examples appreciatively re-used from the Bootstrap documentation. New Styles in 3.6. Rotated and Flipped Icons. normal icon ... ... <看更多>

How to Use Font Awesome Icons in BootstrapIn this tutorial, we will learn How to Use Font Awesome Icons in ... ... <看更多>

The internet's most popular icon toolkit has been redesigned and built from scratch. On top of this, features like icon font ligatures, an SVG framework, ... ... <看更多>