javascript - JS Code didn't work, trying do a demo in css lessons -


but there's demo uses js , css. have been trying fix 3-4 hours.

(fyi after 2 hours struggling have found half of solution. i'm using safari , should -webkit-transform) have tried css added directly element , worked, doesn't worked using js.

i have download jquery-1.11.3.js , import it.

the lesson i'm watching (on 3:45:55)

and when click nothing happened. why!?

login.html

<html xmlns="http://www.w3.org/1999/xhtml"> <head>     <title> </title>     <link rel='stylesheet' type="text/css" href='logincss.css' /> </head> <body>     <div id="banner">please login!</div>     <form>         <div>             <label for="name">name:</label>             <input type="text" name="name" />         </div>         <div>             <label for="email">email:</label>             <input type="text" name="email" />         </div>         <div id="demobutton" class="default">             submit!         </div>     </form>     <script src="jquery-1.11.3.js"></script>     <script>         $(function () {             $('#demobutton').mousedown(function () {                 $(this).removeclass('default');                 $(this).addclass('shrink');             });             $('#demobutton').mouseup(function () {                 $(this).removeclass('shrink');                 $(this).addclass('default');             });          });     </script>  </body> 


logincss.css

html {     font-size: 16px;     font-family: verdana;    }     label {     float: left;     width: 75px; }     div {     margin-bottom: .4em; }     #banner {     background-color: lightblue;     color: white;     width: 100%;     font-size : 4em;     text-align: center; }     #demobutton {     font-weight: bold;     color: white;     background-color: blue;     height: 1.25em;     width: 6em;     text-align: center;     padding-top: .3em;     -webkit-user-select: none;     cursor: crosshair; }     #demobutton::selection {     color: black;     background-color: yellow; }     .shrink{     transform: scale(0.2, 0.2);     -webkit-transform: scale(0.2, 0.2); }     .default {     transform: none;     -webkit-transform: none; } 

instead of using jquery can css using :active

#demobutton:active {     transform: scale(0.2, 0.2);     -webkit-transform: scale(0.2, 0.2); } 

docs:

http://www.w3schools.com/cssref/sel_active.asp


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