Deleting nested property in javascript object

If the property you want to delete is stored in a string, you can use this function

function deletePropertyPath (obj, path) {

  if (!obj || !path) {
    return;
  }

  if (typeof path === 'string') {
    path = path.split('.');
  }

  for (var i = 0; i < path.length - 1; i++) {

    obj = obj[path[i]];

    if (typeof obj === 'undefined') {
      return;
    }
  }

  delete obj[path.pop()];
};

Example Usage

var tenants = {
    'first': {
        'name': 'first',
        'expired': 1
    },
    'second': {
        'name': 'second'
    }
}

var property = 'first.expired';    
deletePropertyPath(tenants, property);

Yes. That would work.

delete tenants['first']['expired']; or delete tenants.first.expired;.

If you are deleting it only because you wanted to exclude it from JSON.stringify(), you can also just set it to undefined, like tenants['first']['expired'] = undefined;