Javascript convert camelcase to dash (hyphen)

camelCaseToDash.js

/**
 * camelCaseToDash('userId') => "user-id"
 * camelCaseToDash('waitAMoment') => "wait-a-moment"
 * camelCaseToDash('TurboPascal') => "turbo-pascal"
 */
function camelCaseToDash (str) {
  return str.replace(/([a-zA-Z])(?=[A-Z])/g, '$1-').toLowerCase()
}