Is it possible to instantiate a JavaScript object in TypeScript?

Question

I have an existing JavaScript "class" , which is defined like this:

function Person(name, age) {
    this.name = name;
    this.age = age;
}

(I know there are no actual classes in JavaScript prior to ES6)

This class needs to be used inside a Angular2 component written in TypeScript. Normally, I would simply instantiate it like this:

var john = new Person('John Doe', 22);

When compiling the TypeScript code into JavaScript I will get an error saying Cannot find name 'Person', since Person is not a TypeScript class.

Is there any solution to use the existing JavaScript class, without rewriting it into TypeScript?

Answer 1

Maybe try

declare var Person:any; // Magic
var john = new Person('John Doe', 22);