/**
         * After place order callback
         */
        afterPlaceOrder: function () {
            // Override this function and put after place order logic here
        },

$this->_quote = null;
          $this->setQuoteId(null);
          $this->setLastSuccessQuoteId(null);
 +        $this->setLoadInactive(false);
 +        $this->replaceQuote($this->getQuote()->save());
          return $this;
      }

<a class="action primary continue" href="<?php /* @escapeNotVerified */ echo $block->getUrl() ?>"><span><?php /* @escapeNotVerified */ echo __('Continue Shopping') ?></span></a>
          </div>
      </div>
 +    <script>
 +        require([
 +            'Magento_Customer/js/customer-data'
 +        ], function (customerData) {
 +            var sections = ['cart'];
 +            customerData.invalidate(sections);
 +            customerData.reload(sections, true);
 +        });
 +    </script>
  </div>