javascript - JS not working in pc but works on JSFIddle -

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the code works in jsfiddle not working when put on html file. can't find error myself.

here working link fiddle demo

and bellow code not working:

<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>untitled document</title>  <script type="text/javascript" src="http://code.jquery.com/jquery-1.10.1.min.js"></script>  <script type="text/javascript"> $('#checkbox1, #checkbox2').on('change', function () {     console.log();     if ($('#checkbox1').is(':checked') && $('#checkbox2').is(':checked')) {         $('#circle_2').css('background-color', '#999');     } else {         $('#circle_2').css('background-color', 'transparent');     } }); </script>  <style type="text/css">  #circle_2 {     border:solid 1px #333;     width: 100px;     height: 100px;     border-radius: 50%;     display:inline-block; } #circle {     border:solid 1px #333;     width: 100px;     height: 100px;     border-radius: 50%;     display:inline-block; } .circle_text{     text-align:center;     font-family:arial, helvetica, sans-serif;     font-size:37px;     color:#333;     font-weight:bold;     } </style>   </head>  <body> <!-- circle 1-->             <div id="position_1">                 <div id="circle">                     <p class="circle_text">                          #1                     </p>                 </div>             </div>             <!-- circle 2-->             <div id="position_2">                 <div id="circle_2">                     <p class="circle_text">                          #2                     </p>                 </div>             </div>              <br/><br/>          <input type="checkbox" value="1" id="checkbox1" name="checkbox1"/> answer 1 <br/>         <input type="checkbox" value="1" id="checkbox2" name="checkbox2"/> answer 2 <br/>         <input type="checkbox" value="1" id="checkbox3" name="a3"/> answer 3 <br/>         <input type="checkbox" value="1" id="checkbox4" name="a4"/> answer 4 <br/>         <input type="checkbox" value="1" id="checkbox5" name="a5"/> answer 5 <br/>         <input type="checkbox" value="1" id="checkbox6" name="a6"/> answer 6 <br/>         <input type="checkbox" value="1" id="checkbox7" name="a7"/> answer 7 <br/>         <input type="checkbox" value="1" id="checkbox8" name="a8"/> answer eight<br/>         <input type="checkbox" value="1" id="checkbox9" name="a9"/> answer 9 <br/>         <input type="checkbox" value="1" id="checkbox10" name="a10"/> answer ten <br/>   </body> </html>

i suspect missing load, can't figure out.

you need wrap jquery code in document ready call.

$(document).ready(function () {     $('#checkbox1, #checkbox2').on('change', function () {         console.log();         if ($('#checkbox1').is(':checked') && $('#checkbox2').is(':checked')) {             $('#circle_2').css('background-color', '#999');         } else {             $('#circle_2').css('background-color', 'transparent');         }     }); });

or before closing body tag. you're executing code before elements exist in page. jsfiddle.net wraps code in document ready call automatically.


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