Question

I have this code…

// Display number of pixels left from nav width
$('.inputs input').live('keyup',function() {
    var nav_width = $('#nav-width').val();
    var sumOfVals = 0;
    $('.inputs input').each(function () {
    sumOfVals = sumOfVals + parseInt($(this).val());
});
sumOfVals = nav_width - sumOfVals;
    $('#px-left em').html(sumOfVals);
});

It needs to be executed on the keyup event of dynamically added input fields but I want to use the ‘on’ event. Is this possible? I have tried replacing ‘live’ with ‘on’ but it didn’t work.

Answer 1

You can’t just replace live with on. If you read the docs about on you’ll see this:

.on( events [, selector] [, data], handler(eventObject) )

So by following that you’d use on like this:

$('.closest-parent').on('keyup', '.inputs input', function () { ... })

.closest-parent is the closest parent element to .inputs. By using the closest parent instead of just document you improve performance.