CODEWITHSUNDEEP
functionclasstypescript
Micheal Hill
Micheal Hill

Reputation: 1649

Can I have a class in Typescript behave as a function?

In Typescript, we can have an interface that represents a function, which looks like so:

interface MyFunction {
    (input1: A, input2: B, ...): ReturnType
}

Is it possible to do anything like this with a class? I'd like to have a class that behaves as a function, but I can't find any documentation on that.

I've tried the same format within a class, but that doesn't appear to work.

class Greeter {
    private greeting: string = 'hello'

    // this doesn't work
    (name: string): string {
        return `${this.greeting}, ${name}`
    }
}

Upvotes: 1

Views: 513

Answers (1)

basarat
basarat

Reputation: 276181

Can I have a class in Typescript behave as a function?

Not at the moment.

There is an issue tracking it : https://github.com/Microsoft/TypeScript/issues/183

There is also the call constructor proposal in ECMAScript : https://github.com/tc39/ecma262/blob/master/workingdocs/callconstructor.md

Upvotes: 1

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