Exercise:

Use the children() method to add a red color to the element with class="demo" inside <div>.

Syntax hint: $(selector).children(filter)

<!DOCTYPE html>
<html>
<head>
<style>
.descendants * { 
    display: block;
    border: 2px solid lightgrey;
    color: lightgrey;
    padding: 5px;
    margin: 15px;
}
</style>
<script src="../../ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("div").children(".demo").css({"color": "red"});
});
</script>
</head>
<body>

<div class="descendants" style="width:500px;">div (parent) 
  <p class="demo">paragraph 1</p>
  <p>paragraph 2</p>
</div>

</body>
</html>