$ npm install cxn --save
var cxn = require('cxn')
[data-cxn~="stable"] { border-top:4px solid blue }
[data-cxn~="unstable"] { border-top:4px dotted yellow }
[data-cxn~="online"] { border-top-color:green }
[data-cxn~="offline"] { border-top-color:red }