Find duplicate textField value

by Bhupesh Kushwaha

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<input class="bookseries" name="invbookseries" type="text" />	
<input class="bookseries" name="invbookseries" type="text" />	
<input class="bookseries" name="invbookseries" type="text" />

JavaScript

$(document).on("change",".bookseries",function ()
{
	var chkno = $(this).val();
	var sameCount = 0;		
	$("input[name=\"invbookseries\"]").each(function(){
		if(chkno == $(this).val())
		{
			sameCount++;
		}			
	});				
	if(sameCount >= 2)
	{
		console.log ( "Same value" );
    alert("Same value");
	}
	else
	{
		console.log ( "Not Same value" );
    alert("Not Same value");
	}
});