javascript - Backbone multi events -

i'm trying understand following code:

muconfigview.on("mu:field:changed", function() {   updatebuttonstate(); }, this);

this.trigger('validate:fields');

i have seen examples events change etc understand.

could 1 explain me purpose of "mu:field:changed" & 'validate:fields' is?

backbone has it's own events built in, can make own, can trigger , listen for.

the convention "namespace" events using colons (:) can better organise code can out of hand once start using lot of events.

in first example, when mu:field:changed triggered, anonymous function called.

in second example, validate:fields event being fired , handled listener somewhere else.

Detect