recursive-lowercase-json/dist/index.js

Small function recursively converts object keys to lowercase within JSON-compatible object.

'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj; };

var isArray = function isArray(obj) {
  return Object.prototype.toString.call(obj) === '[object Array]';
};

var recursivelyLowercaseJSONKeys = function recursivelyLowercaseJSONKeys(obj) {
  if ((typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) !== 'object' || obj === null) {
    return obj;
  }
  if (isArray(obj)) {
    return obj.map(function (o) {
      return recursivelyLowercaseJSONKeys(o);
    });
  }
  return Object.keys(obj).reduce(function (prev, curr) {
    prev[curr.toLowerCase()] = recursivelyLowercaseJSONKeys(obj[curr]);
    return prev;
  }, {});
};

module.exports = recursivelyLowercaseJSONKeys;