Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $(".btn1").click(function(){
  $("#p1").animate({minWidth:"200px"});
  });
  $(".btn2").click(function(){
  $("#p1").animate({minWidth:"100px"});
  });
});
</script>
</head>
<body>

<button class="btn1">Animate</button>
<button class="btn2">Reset</button>

<p>This is a paragraph.</p>
<p id="p1" style="width:100px;border:1px solid blue;">This is an animated paragraph.</p>
<p>This is a paragraph.</p>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.