jQuery animate() height

Description

jQuery animate() height

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<!DOCTYPE html>
<html>
<head>
<script 
 src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
</script>/* ww  w.j a  v  a  2 s. com*/
<script>
$(document).ready(function(){
  $(".btn1").click(function(){
    $("#p1").animate({height: "+=20px"});
  });
  $(".btn2").click(function(){
    $("#p1").animate({height: "-=20px"});
  });
});
</script>
</head>
<body>

<button class="btn1">Animate +</button>
<button class="btn2">Animate -</button>

<p>This is a paragraph.</p>
<p id="p1" style="">This is an animated paragraph.</p>
<p>This is a paragraph.</p>

</body>
</html>



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