Convert returned JSON Object Properties to (lower first) camelCase

Question

I have JSON returned from an API like so:

Contacts: [{ GivenName: "Matt", FamilyName: "Berry" }]

To keep this consistent

Answer 1

To change a plain object's keys from snake_case to camelCase recursively try the following
(which uses Lodash):

function objectKeysToCamelCase(snake_case_object) {
  var camelCaseObject = {};
  _.forEach(
    snake_case_object,
    function(value, key) {
      if (_.isPlainObject(value) || _.isArray(value)) {     // checks that a value is a plain object or an array - for recursive key conversion
        value = objectKeysToCamelCase(value);               // recursively update keys of any values that are also objects
      }
      camelCaseObject[_.camelCase(key)] = value;
    }
  )
  return camelCaseObject;
};

test in this PLUNKER

Note: also works recursively for objects within arrays