Exercise:

Use the animate() method to set the height of <div> to 500 pixels.

構文のヒント：$("element").animate({property:"value"});

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("div").animate({height: "500px"});
});
</script>
</head>
<body>

<div style="background:#98bf21;height:100px;width:100px;position:absolute;"></div>

</body>
</html>