RequireJS factory plugin. Uses temporarily unique resource names to trick Require into calling plugin#load every time the resource is needed, and returns a new instance of the resource every time.

demo.js

define('itemFactory', function () {
    function Item() {
        this.value = Math.ceil(Math.random() * 1000);
    };
    
    return Item;
});

define('firstView', ['factory!itemFactory'], function (item) {
    console.log('First view; ' + JSON.stringify(item));
});

define('secondView', ['factory!itemFactory'], function (item) {
    console.log('Second view; ' + JSON.stringify(item));
});

// => First view; {"value":317}
//    Second view; {"value":35} 

factory.js

define('factory', function () {
    var count = 1;
    
    return {
        load: function (name, req, onLoad, config) {
            var cap = name.match(/^\d+!(.*)$/);
            if (cap) {
                name = cap[1];
            }
            req([name], function (factory) {
                onLoad(new factory());
            });
        },
        normalize: function (name, normalize) {
            if (!name.match(/^\d+!/)) {
                return (count++) + '!' + name;
            }
            return name;
        }
    };
});