jQuery animate()
width
<!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"> </script>//from w w w .ja v a 2 s . c o m <script> $(document).ready(function(){ $(".btn1").click(function(){ $("#p1").animate({width: "+=50px"}); }); $(".btn2").click(function(){ $("#p1").animate({width: "-=50px"}); }); }); </script> </head> <body> <button class="btn1">Animate +</button> <button class="btn2">Animate -</button> <p>This is a paragraph.</p> <p id="p1" style="width:100px;">This is an animated paragraph.</p> <p>This is a paragraph.</p> </body> </html>