Give data attribute to row not working

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Im trying to add an attribute to a row with a specific class using .attr but nothing happens. Tried giving it to the nav-tag and it works, but when I try to give it to a .row div it doesn't. Anyone who has a clue why? Im not very good at JS.

my code:

$(document).ready(function(){
$('.row.light').attr('data-info', '222');
});

Hey!

Please use "jQuery" instead of "$"
as described here:
http://laytheme.com/documentation.html#custom-javascript

Also document ready wont work, you will need to use the event "newpageshown" as described here:
http://laytheme.com/documentation.html#newpage-events

@arminunruh Thanks a lot man :)