evt.getHandlers()

List all handlers attached to the Evt. Returns an array of Handler<T,any>.
Here a use case detaching all handlers that uses a given matcher:
import { Evt } from "evt";
​
const evtShape = new Evt<Shape>();
​
evtShape.attach(
    matchCircle,
    circle => console.log("1:", circle)
);
​
evtShape.attachOnce(
    matchCircle,
    circle => console.log("2:", circle)
);
​
evtShape.waitFor(matchCircle)
    .then(circle => console.log("3:", circle))
    ;
​
//Only handler that does not use matchCircle as operator.
evtShape.attach(circle => console.log("4:", circle))
​
​
evtShape.getHandlers()
    .filter(({ op }) => op === matchCircle)
    .forEach(({ detach }) => detach())
    ;
​
//Prints only "4: ..." other handlers are detached.
evtShape.post({ "type": "CIRCLE", "radius": 300 });
​Run the example​
Equivalent of EventEmitter's handler.detach(callback)
To detach all the handlers using a given callback function as we do with EventEmitter:
import { Evt } from "evt";
​
const evtText = new Evt<string>();
​
const callback = (text: string) => console.log(text);
​
evtText.attach(callback);
​
evtText.post("Foo"); //Prints "Foo"
​
evtText.getHandlers()
    .filter(handler => handler.callback === callback)
    .forEach(({detach})=> detach())
    ;
​
evtText.post("Foo"); //Prints nothing
​Run the example​
evt.pipe(...)
evt.isHandled(data)
Last modified 1yr ago