JSFiddle - React, Tailwind, and code Playground

HTML

<span class="twitter-typeahead" style="position: relative; display: inline-block;">
	<input class="typeahead  form-control tt-hint" value="" type="text" id="week_autocomplete" autocomplete="off" spellcheck="false" tabindex="-1" dir="ltr">
	<input class="typeahead  form-control tt-input" name="year_autocomplete" value="" type="text" id="year_autocomplete" autocomplete="off" spellcheck="false" dir="auto">
	<input name="week" value="0" type="hidden" id="week">
    <input name="year" value="1" type="hidden" id="year">
</span>

JavaScript

$(function(){
    var hiddenId;
    $("input.typeahead").click(function(){
        var idInputField = $(this).attr("id");//***_complete
        hiddenId = idInputField.split("_").slice(0,1);//****
    	if(!parseInt($("#"+hiddenId[0]).val())){
        	console.log('Беда');
        } else {
            console.log('Норм');
        }
    });
    
});