Question

I’m trying to figure out, how I can set arguments for custom events.
How I can set an argument when I subscribing the event and then add some additional data when I trigger event.

I have a simple JS for testing, but in e parameter of "handle" I see only data of subscribe.

function handle(e) {
    //e.data has only "b"
    alert(e.data);
}

function myObj() {
    this.raise = function () {
            //Trigger
        $(this).trigger("custom", { a: "a" });
    }
}

var inst = new myObj();
//Subscribe
$(inst).bind("custom", { b: "b" }, handle);
inst.raise();

Answer 1

Parameters supplied to .trigger() are passed as the second parameter of the event handler function.

function handle(e, triggerParam) {
    //e.data has only "b"
    alert(e.data + ' also ' + triggerParam);
}