<script>
$(document).ready(function () {
$("#button1").click(function () {
$("#div1").load("/Home/GetPartial");
});
});
</script>
public IActionResult GetPartial()
{
List<string> countries = new List<string>();
countries.Add("USA");
countries.Add("UK");
countries.Add("India");
return PartialView("_CountriesPartial",countries);
}
<button type="button" id="button1">Load Partial View</button>
<div id="div1"></div>