Step 1: Create Index.php file and implement below html code:
<img id="dummyimage" src="http://dummyimage.com/450x255/" alt="" /> <button class="btn btn-info" id="changeSize">Change Size</button>
<script type="text/javascript"> // Stockphotos JS $(document).ready(function(){ var flag = 0; $("button#changeSize").click(function(){ if(flag == 0) { $("#dummyimage").attr("src","http://dummyimage.com/250x155/"); flag = 1; } else if(flag == 1) { $("#dummyimage").attr("src","http://dummyimage.com/450x255/"); flag = 0; } }); }); </script>
<html> <head> <title>How To Change Div Size On Click Of Button Using JQuery</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script> </head> <style> body { background: black; } </style> <body> <div class="container"> <br><br><br> <div class="text-center"> <h1 id="color" style="color: White;">Change Div Size On Click Of Button Using JQuery</h1> </div> <br> <div class="col-md-12"> <div class="well"> <img id="dummyimage" src="http://dummyimage.com/450x255/" alt="" /> <button class="btn btn-info" id="changeSize">Change Size</button> </div> </div> <br> </div> </body> </html> <script type="text/javascript"> // Stockphotos JS $(document).ready(function(){ var flag = 0; $("button#changeSize").click(function(){ if(flag == 0) { $("#dummyimage").attr("src","http://dummyimage.com/250x155/"); flag = 1; } else if(flag == 1) { $("#dummyimage").attr("src","http://dummyimage.com/450x255/"); flag = 0; } }); }); </script>