如何编写jQuery遍历函数

Question

I want to write a jQuery function called nextOrPrev() that works similar to jQuery's next() and prev() , which returns the next sibling or, in case there isn't any, the previous one. The function should be compatible with jQuery's existing traversal functions like siblings() , but also end() .

What do I have to write in $.fn.extend() ?

My attempt was to create an array and then populate it in a this.each loop and at the end, return it, but returning that creates a new stack.

Answer 1

Shouldn't be a problem, just write it like any jQuery plugin

$.fn.nextOrPrev = function() {
    var args = arguments;
    return $(this).map(function(_,el) {
        var next = $.fn.next.apply($(el), args);
        return (next.length ? next : $.fn.prev.apply($(el), args)).get();
    });
}

and use it

$('#elem1, #elem2').nextOrPrev()

FIDDLE