How Pass 2 Parameters to Eventemitter in Angular?
I Have in My Component an Eventemitter but I Can't Compile It Because It Throws the Error: Supplied Parameters Do Not Match Any Signature of Call Target My...
I have in my component an EventEmitter but I can't compile it because it throws the error:
Supplied parameters do not match any signature of call target
My component:
@Output() addModel = new EventEmitter<any>();
saveModel($event, make, name) {
this.addModel.emit(make, name);
}
If I delete one of the parameters in this.addModel.emit() it works but is it possible to pass 2 parameters to EventEmitter and how?
4 Answers
If you look at the EventEmitter emit method @ angular.io, it can only take a single parameter of type T
emit(value?: T)
Since only a single parameter is allowed, consider passing it as an object in emit method.
In the snippet below, make & name variables are holding their respective values:
this.addModel.emit({make: make, name: name});
//shorthand is below
this.addModel.emit({make, name});
Another option to strongly type it is as follows:
@Output addModel = new EventEmitter<{make: string, name: string}>();
you can then emit it like @Pankaj-Parkar shows
this.addModel.emit({make, name});
or
this.addModel.emit({make: 'honda', name: 'civic'});
You now have strong typing instead of using object or any.
I fixed it by making
EventEmitter<object>();
Then I was able to pass an object such as:
this.MyOutputVariable.emit({ name: 'jack', age: '12' });
And it worked.
I know this is an old Question for me I would create an interface and send it as an object where I can have my code more organized
export interface addModelArgs{
make:string,
name:string
}
@Output() addModel = new EventEmitter<addModelArgs>();
and call it as following
this.addModel.emit({make: 'honda', name: 'civic'});
or
let savParamters:addModelArgs={make: 'honda', name: 'civic'};
this.addModel.emit(savParamters);
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
