jquery - Add to current CSS top value -

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i have jquery:

$(".ta").siblings(".aname:eq(0)").css("top",+=$(".text").height()+15);

but not working. have tried way too:

$(".ta").siblings(".aname:eq(0)").css("top",'+=$(".text").height()+15');

but did not work.

you have grab current top value, , add new value, , append "px" on when set value using .css()

here like: 

var element = $(".ta").siblings(".aname:eq(0)"); var currtop = number(element.css("top").replace("px", "")); var amounttoadd = $(".text").height() + 15; $(element).css("top", (currtop + amounttoadd + "px"));

and here working demo


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