JSFiddle - React, Tailwind, and code Playground

by master1991

HTML

<div class="qInDocBXXX"></div>
<input type="text" name="valueToAdd" data-item="XXX" class="BvalueToAddXXX  BenterInput">
	 
<a 
   class="btn btn-default btn-xs add_row BXXX" 
   data-but="B" 

   style="display: none;"
   >
  XXX
</a>

JavaScript

$(document).on('keyup', ".BenterInput", function(){
	var item = $(this).attr('data-item');
	var num = $(this).val();
	
	if($.isNumeric(num)){
		$(`a.B${item.split(" ").join(".")}`).show();
	}else{
		$(`a.B${item.split(" ").join(".")}`).hide();
	}
  
  console.log(item+' '+num);
});