Check out example codes for "jquery remove css style". It will help you in understanding the concepts better.

Code Example 1

//removing css with jQuery. i.e: set to default 
$( "#myElementID" ).css("background-color", "");//just blank it out

Code Example 2

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

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