css - Use jquery to increase width of container by 10 rem -


how can increase width of element 10rem using jquery. issue jquery return width/height in pixels , want update height/width in other units.

example on: js bin

var $c = $('#container'); console.log($c.width());  var c = document.getelementbyid('container');  // q1. why different above one. 324 while earlier 320. see output. console.log(c.clientwidth);  // q2. how update code increase width 10rem. $c.css({width: $c.width() + 10}); //it adds 10 pixels here.  console.log($c.width());

my questions comments in code.

i suppose taking font-size of html element give rem, using function, you'll able retrieve if changes:

   // function return initial font-size of html element     var rem = function rem() {         var html = document.getelementsbytagname('html')[0];          return function () {             return parseint(window.getcomputedstyle(html)['fontsize']);         }     }();  // function convert pixel rem     function torem(length) {         return (parseint(length) / rem());     }

example: http://jsfiddle.net/4nksu/1/


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