Question

I have a live() function in my jquery below:

$("#qandatbl td.weight input").live("change", calculateTotal);

function calculateTotal()
{
   var totalweight = hundred;
   $("#qandatbl td.weight input").each(function (i, elm){
        totalweight = totalweight - parseInt($(elm).val(), 10);
    });

    $("#total-weight").text(totalweight).append('%').css('font-weight', 'bold');
}

Now some people say that the live() function is slowing fading away and that is better to use the on() function. If this is true then how do I change the code above to on() function rather than a live() function? Is it important I don’t use live() or does it not really matter that much?

Answer 1

According to the documentation:

Rewriting the .live() method in terms of its successors is straightforward; these are templates for equivalent calls for all three event attachment methods:

$(selector).live(events, data, handler);                // jQuery 1.3+
$(document).delegate(selector, events, data, handler);  // jQuery 1.4.3+
$(document).on(events, selector, data, handler);        // jQuery 1.7+

So in your case, if you’re using jQuery 1.7+, it would be:

$(document).on('change', '#qandatbl td.weight input', calculateTotal);