JSFiddle - React, Tailwind, and code Playground

HTML

<input id="autocomplete"/>&nbsp;<input id="submit" type="submit"/>

JavaScript

var source = ['One', 'Two', 'Three', 'Four'];

var firstVal = source[0];

$("input#autocomplete").autocomplete({
    minLength: 3,
    source: source,
}).focus(function() {
    $(this).autocomplete("search", "");
});