Question

I working with jQuery and I need to get anytime and anywere exception (with any operation), if I attach some event or try to perform some action with elements (got from selector) that don’t exist.
Is there some internal “strict” mode in jQuery for this issue?

Answer 1

No, there isn’t.

However, you could make a simple plugin for it:

$.fn.checkEmpty = function() {
    if (!this.length)
        throw new Error("No elements matched by " + this.selector);
    return this;
};

$('...').checkEmpty().bind(...);

Alternatively:

function $s() { return $.apply(this, arguments).checkEmpty(); }

$s('...').bind(...);