JSFiddle - React, Tailwind, and code Playground

HTML

<select Id="exportListBox" multiple="multiple" name="PropertyList"><option value="Id">Id</option>
<option value="Model_Id" selected>Model_Id</option>
<option value="Model">Model</option>
<option value="Manufacturer_Id" selected>Manufacturer_Id</option>
    
<option value="Manufacturer">Manufacturer</option>
<option value="Type_Id">Type_Id</option>
<option value="Type">Type</option>
<option value="Location_Id">Location_Id</option>
<option value="Location">Location</option>
<option value="Vendor_Id">Vendor_Id</option>
<option value="Vendor">Vendor</option>
<option value="Status_Id">Status_Id</option>
<option value="Status">Status</option>
<option value="ip_address">ip_address</option>
<option value="mac_address">mac_address</option>
<option value="note">note</option>
<option value="owner">owner</option>
<option value="cost">cost</option>
<option value="po_number">po_number</option>
<option value="description">description</option>
<option value="invoice_number">invoice_number</option>
<option value="serial_number">serial_number</option>
<option value="asset_tag_number">asset_tag_number</option>
<option value="acquired_date">acquired_date</option>
<option value="disposed_date">disposed_date</option>
<option value="verified_date">verified_date</option>
<option value="created_date">created_date</option>
<option value="created_by">created_by</option>
<option value="modified_date">modified_date</option>
<option value="modified_by">modified_by</option>
</select>
<div id="result"/>

JavaScript

var selectedValues = [];
$("#exportListBox :selected").each(function() {
  selectedValues.push($(this).attr('value'));
});
$('#result').text(JSON.stringify(selectedValues));