class-set is a Javascript library to create CSS class strings out of arbitrary parameters.
This is a conceptual extension of React's classSet.
The primary difference is that you can supply an arbitrary number of arguments with mixed types, and each will be evaluated.
var classSet = require('class-set');
classes = classSet({ one: true, two: true, nope: false }, "three", null, "four");
// classes is now "one two three four"
via npm:
$ npm install class-set
class-set is licensed under MIT.