toCamelCase.js

// http://stackoverflow.com/questions/10425287/convert-string-to-camelcase-with-regular-expression
// fetch me my camel, Jeeves

var toCamelCase function (str) {
  return str.toLowerCase().replace(/-(.)/g, function(match, group1) {
    return group1.toUpperCase();
  });
}

ES2015:

let toCamelCase = (s) => s.toLowerCase().replace(/-(.)/g, (m, g) => g.toUpperCase());