JSFiddle - React, Tailwind, and code Playground

HTML

<input data-autocomplete-source="/QuickSearchCity" name="CityName" type="text">
<input data-autocomplete-source="/QuickSearchCountry" name="CountryName" type="text">


<input type="text" id="result" />

JavaScript

(function ($) {
    var i=0;
    $(document).one('focus', 'input[type="text"][data-autocomplete-source]', function () {
        $('#result').val(i++)
    });
})(jQuery);