JSFiddle - React, Tailwind, and code Playground

HTML

<label for="BPartnerName">хэрэглэгч:</label>
<input id="BPartnerName">

JavaScript

$("#BPartnerName").autocomplete({
    source: ["atlas", "overwhelmer", "singing god"],
    close: function (event, ui) {
        alert($(this).val());
    }
});