braintree-web/lib/camel-case-to-snake-case.js

A suite of tools for integrating Braintree in the browser

"use strict";

// Taken from https://github.com/sindresorhus/decamelize/blob/95980ab6fb44c40eaca7792bdf93aff7c210c805/index.js
function transformKey(key) {
  return key
    .replace(/([a-z\d])([A-Z])/g, "$1_$2")
    .replace(/([A-Z]+)([A-Z][a-z\d]+)/g, "$1_$2")
    .toLowerCase();
}

module.exports = function (obj) {
  return Object.keys(obj).reduce(function (newObj, key) {
    var transformedKey = transformKey(key);

    newObj[transformedKey] = obj[key];

    return newObj;
  }, {});
};