javascript - Change Color Themes - How To Prevent the Site Goes Back to Default -


i have default css file website , link master page.

<link href="~/content/blue/maincss.css" rel="stylesheet" title="main" />

then, have jquery code change color theme below

   $(".greensquare").on('click', function (e) {         $('link[title="main"]').attr('href', '~/content/green/maincss.css');         e.preventdefault();     });

the function works well, when greensquare click, site color changed green. however, after page loaded, goes default color theme, unfortunately.

how prevent site goes default color? thanks,

edit storage involved

$(".greensquare").on('click', function set_theme(theme) {     $('link[title="main"]').attr('href', '~/content/green/maincss.css'); }); if (typeof (storage) !== "undefined") {      function set_theme(theme) {         $('link[title="main"]').attr('href', '~/content/green/maincss.css');         if (supports_storage) {             localstorage.theme = theme;         }         if (supports_storage) {             var theme = localstorage.theme;             if (theme) {                 set_theme(theme);             }         } else {           }     } }

but somehow doesn't work, yet.

you use window.localstorage save color information across page loads.

<!doctype html>     <html>     <head>     <title>cookie</title>     <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>      <link href="" rel="stylesheet" title="main" />     <script type="text/javascript">      $(document).ready(function(){          // when page loads, cookie value.          var currentcolor = localstorage.getitem('my_bgcolor');             // if find         if (currentcolor === "green") {             $('link[title="main"]').attr('href', 'green.css');         }         if (currentcolor === "red") {             $('link[title="main"]').attr('href', 'red.css');         }         if (currentcolor === "") {             $('link[title="main"]').attr('href', 'green.css');         }         $(".greensquare").on('click', function(e) {             e.preventdefault();             $('link[title="main"]').attr('href', 'green.css');             // set storage item 'green'.             localstorage.setitem('my_bgcolor', 'green');         });        $(".redsquare").on('click', function(e) {             e.preventdefault();             $('link[title="main"]').attr('href', 'red.css');             // set storage item 'red'.             localstorage.setitem('my_bgcolor', 'red');               });      });     </script>      </head>      <body>     <a href="#" class="greensquare" id="green">click me</a>     <a href="#" class="redsquare" id="red">click me</a>      </body>     </html>

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