javascript - toggleClass in jquery dosent work when i use id selector in Css -


i'm new @ jquery , have problem when use id selector in css jquery code doesn't work.

here html: 

<body>         <div id="fm">     </div> </body>

here javascript code: 

$(function () {     $("#fm").click(function () {         $(this).toggleclass("cm");     }); });

this css ok , works:

body>div{      height:100px;     background-color:blue;     transition:all ease 0.5s;     position:fixed;     top:0;     left:0;     bottom:100px;     right:0;     z-index:1000; }

but if use #fm in css selector doesn't work. think may because of cascading behavior don't know how fix it.

here css doesn't work:

#fm{      height:100px;     background-color:blue;     transition:all ease 0.5s;     position:fixed;     top:0;     left:0;     bottom:100px;     right:0;     z-index:1000;     border:1px solid black; }

and cm class

.cm {     background-color:red;     height:150px; }

i appreciate if help

try

#fm.cm

for cm rule. way, id doesn't override class


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