minions.opacity

source on Github 
    
/*! minions.css */
.o-1{opacity:1}
.o-\.9{opacity:.9}
.o-\.8{opacity:.8}
.o-\.7{opacity:.7}
.o-\.6{opacity:.6}
.o-\.5{opacity:.5}
.o-\.4{opacity:.4}
.o-\.3{opacity:.3}
.o-\.2{opacity:.2}
.o-\.1{opacity:.1}
.o-0{opacity:0}

Installation

npm

npm install minions.opacity

browser

<link rel="stylesheet" href="https://unpkg.com/minions.opacity" />

License

The MIT License (MIT)
Copyright (c) 2016 Michael Chan