sass simple mixin

mixin1.css

@mixin floaty($minimized-by-default, $side: left)
    float: $side
    width: 300px
    @if $minimized-by-default 
        overflow: hidden
        width: 5px
    


.navigation
    background: green
    @include floaty(false)

.navigation.secondary
    background: blue
    @include floaty(true, right)