lodash.js fiddle

Added lodash from cdnjs.com in order to have lodash capabilities in chrome.

by meetravi

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js"></script>

JavaScript

var errorCopy =  {
      registerDetails: {
          firstName: '',
          lastName: '',
          thirdName: '',
    }
};

var param = { firstName: '' };

console.log('errorCopy', errorCopy);

var key = Object.keys(param);

console.log('key', key);

var result = _.unset(errorCopy, `registerDetails[${key[0]}]`);

console.log('errorCopy2:', errorCopy);

console.log('result', result);