JSFiddle - React, Tailwind, and code Playground

by joeyczech

TypeScript

class Test
{    
    public CallFn(passedFn: ICallback, ...args: any[]): void
    {
        //passedFn(args); // error

        let hasTwoArguments = args && args.length && args.length === 2;
        if(!hasTwoArguments)
        {
            return;
        }

        let firstArgument: string = args[0];
        let secondArgument: number = parseInt(args[1]);

        passedFn(firstArgument, secondArgument);
    }
}

interface ICallback 
{ 
    (a: string, b: number): void
}

class Callback
{    
    public MyFunction = (a: string, b: number) => 
    {
         alert("it's working");
    }
}

let testIntance = new Test();
let callbackIntance = new Callback();

testIntance.CallFn(callbackIntance.MyFunction, 1, 2);