count the characters in the textarea using jquery

character count jquery

<center>
<textarea maxlength="100"></textarea>
<div id="charNum" class="text-light"></div></center>	
<script>
	// character counting				
	$('textarea').on("input", function(){
    var maxlength = $(this).attr("maxlength");
    var currentLength = $(this).val().length;

    if( currentLength >= maxlength ){
		 $('#charNum').text(' You have reached the character limit');
    }else{
        
		$('#charNum').text(maxlength - currentLength + " characters left");
    }
});
</script>