Function Overloading in TypeScript

Question

Is function overloading not supported in TypeScript?

I have these two functions:

checkCredits() {
   // my code
}

checkCredits(header: any) {
    // my code
}

And I call the second function like this:

this.checkCredits(this.myObject);

When compiling in vs code I get these errors: Supplied Parameters do not match any signature of call target. Duplicate function implementation.

Suraj Rao · Accepted Answer · 2017-03-06 13:31:44Z

2

Overloading in typescript is done by using optional parameters.

checkCredits(header?: any) {
    // my code
}

Now you can call:

this.checkCredits(this.myObject);

and

this.checkCredits();

Downside you have the logic in the same function.You can check the issue

answered Mar 6, 2017 at 13:31

Suraj Rao

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2 Comments

Thanks! I wasn't aware of that.

@Rich you can also do it this way. But didnt seem necessary in your example