Question

I’m wasting time trying to fire a binded action from another checkbox (with jQuery)

http://jsfiddle.net/gasparirob/ZbMHQ/

as you can see, if I click the first checbox, the alert is fired (when the checkbox is checked). But if I click the second checkbox (that checks the first checkbox too), the alert doesn’t fire!

Why?

Answer 1

You need to invoke it manually

$('#checkThis').change(function(){
    $("#target").prop("checked", $(this).is(':checked'))
                .change();
});

$('#target').change(function(){
    if ($(this).is(':checked')) {
        alert ('checked');
    }
});​

http://jsfiddle.net/ZbMHQ/1/

I’ve also changed your code to use .prop() which makes it more clear.