Custom events in JS

[buuuudzik]

Hello,

I want to create some custom events in JS. I've found such solution:

Code:

var event = new CustomEvent(
    "newMessage",
    {
        detail: {
            message: "Hello World!",
            time: new Date(),
        },
        bubbles: true,
        cancelable: true
    }
);

document.getElementById("msgbox").dispatchEvent(event);

https://www.sitepoint.com/javascript-custom-events/

But to do this I must connect event to some nearly dummy selector but I know that currently there are such events:

Code:

.. grp.listen('6/0/54', function(obj, type) { ...

which not need any HTML selector. How to do something similar, e.g. generate event when plan changed for whole scripts?