Buttons with icon
Using icons in buttons can help to enhance the user experience. Buttons with icons should have a corresponding label.
Place the icons before label in order for users to see them first.
Add EOS-icons icon inside any style of button to create a button with an icon.
Only icon buttons
.btn-icon class, in addition to the default button classes, when you need
nothing but an icon inside a button.
Icon buttons require the use of tooltips to provide users with a short explanation.