Typescript double identifier on declaration file

Question

I have write a class function that return the instance of myClass if it is not the instance of the class.

function myClass(){
    if ( this instanceof myClass )
        return myClass();
}

Hence, both new myClass() and myClass() and get the instance of the myClass.

myClass(); // return myClass instance
new myClass(); // return myClass instance

However, I don't know how to declare the above class in typescript declaration file.

If I write that:

class myClass{}
function myClass(): myClass;

This will be duplicate identifier error.

Is there any method to fix that? thanks!

Answer 1

Use different names

// Uppercase first letter!
class Greeter {
    greeting: string;
    constructor(message: string) {
        this.greeting = message;
    }
}

// lowercase first letter
function getGreeterInstance() {
    return new Greeter("Hello");
}

Explanation

• TypeScript has its conventions, you'll save yourself a lot of headaches if you follow them.
• Use descriptive/self-explanatory names. myClass is not clear enough for who reads the code.
• Use different names for you definitions.

Notes

Make sure to check out TypeScript's documentation on classes and functions .