ES6 module to recursively convert snake case keys in an object to camel case using lodash.

snakeToCamelCase.js

'use strict';

/**
 * @example
 *   import keysToCamelCase from './snakeToCamelCase';
 *   keysToCamelCase({bad_key: 1});   => {badKey: 1}
 *   keysToCamelCase([{bad_key: 1}]); => [{badKey: 1}]
 */

function keysToCamelCase(object) {
  let camelCaseObject = _.cloneDeep(object);

  if (_.isArray(camelCaseObject)) {
    return _.map(camelCaseObject, keysToCamelCase);
  } else {
    camelCaseObject = _.mapKeys(camelCaseObject, (value, key) => {
      return _.camelCase(key);
    });

    // Recursively apply throughout object
    return _.mapValues(camelCaseObject, (value) => {
      if (_.isPlainObject(value)) {
        return keysToCamelCase(value);
      } else if (_.isArray(value)) {
        return _.map(value, keysToCamelCase);
      } else {
        return value;
      }
    });
  }
}

export default keysToCamelCase;

Latest version handles case where top-level object is an array

Previously [{a:1}] would become {0: {a:1}}