JSFiddle - React, Tailwind, and code Playground
by xawixawxaw
HTML
<select multiple id="BranchId">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
JavaScript
var branchIds = $("#BranchId").map(function () { return $(this).val();});
alert(branchIds);