jQuery length Property

Introduction

Alert the number of <li> elements:

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<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    document.getElementById("demo").innerHTML = 
       $("li").length;
  });//  w  w  w  . j  a v  a2  s .c o m
});
</script>
</head>
<body>

<p id="demo"></p>
<button>Alert the number of li elements</button>

<ul>
  <li>CSS</li>
  <li>HTML</li>
  <li>Javascript</li>
</ul>

</body>
</html>

The length property contains the number of elements in the jQuery object. 

$(selector).length



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