Event emitter which allows listeners to return a value.
This is beneficial for the themes since it allows plugins to modify the HTML output
without doing unsafe text replacement.
This class is functionally nearly identical to the {@link EventEmitter} class with
two exceptions.
The {@link EventEmitter} class only awaits return values from its listeners, it
does not return them to the emitter.
This class requires listeners to by synchronous, unless R is specified as to be
a promise or other deferred type.
example
constx = newEventHooks<{ a: [string] }, string>() x.on('a', a=>a.repeat(123)) // ok, returns a string x.on('b', console.log) // error, 'b' is not assignable to 'a' x.on('a'a=>1) // error, returns a number but expected a string
Event emitter which allows listeners to return a value.
This is beneficial for the themes since it allows plugins to modify the HTML output without doing unsafe text replacement.
This class is functionally nearly identical to the {@link EventEmitter} class with two exceptions.
awaits return values from its listeners, it does not return them to the emitter.Ris specified as to be a promise or other deferred type.