typescript parameter function type
class Foo {
save(callback: (n: number) => any) : void {
callback(42);
}
}
var foo = new Foo();
var strCallback = (result: string) : void => {
alert(result);
}
var numCallback = (result: number) : void => {
alert(result.toString());
}
foo.save(strCallback); // not OK
foo.save(numCallback); // OKParameter type from function TypeScript
//parameter
type Parameter<T extends (...args: any[]) => any> = T extends (...args: infer P) => any ? P : never;
type paraMeterCheck = Parameter<(a: string, b: string) => void>;Copyright © 2021 Codeinu
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