This post shows you How to get @Url.Action url in a separate script file?
@section Scripts{
<script type="text/javascript">
var app = app || {};
app.Urls = app.Urls || {};
app.Urls.baseUrl = '@Url.Content("~")';
app.Urls.addEditUrl = '@Url.Action("AddEdit")';
app.Urls.getListUrl = '@Url.Action("GetList")';
</script>
<script src="~/js/external.js"></script>
}
In your javascript file, you can easily get url from @Url.Action in ASP.NET or ASP.NET Core as shown below.
var url = app.Urls.getListUrl
I hope you you can solve the problem jquery url action in external js file