css remove in jquery code example

Example 1: remove css jquery

$("#id").css({ 'background-color' : '', 'opacity' : '' });
$(".class").css({ 'background-color' : '', 'opacity' : '' });
//You can remove css by the above.

Example 2: jquery remove css

$("#id .class").css({ 'background-color' : '' });

/* 
   As mentioned in the jquery documentation:
   Setting the value of a style property to an empty string  
   removes that property from an element 
   if it has already been directly applied
   e.g. $('#mydiv').css('color', '')
*/