data-role
button

data-corners
true | false

data-icon
home | delete | plus | arrow-u | arrow-d | check | gear | grid | star | custom | arrow-r | arrow-l | minus | refresh | forward | back | alert | info | search

data-iconpos
left | right | top | bottom | notext

data-iconshadow
true | false

data-inline
true | false

data-shadow
true | false

data-theme
a ~ z