Typescript definition for a constructor on a static class

Question

I'm having a bit of trouble figuring out how to write a type definition for the following code. I guess the best way to describe it is a static class that contains a named constructor.

var ajaxAdapter = new IAjaxAdapter.implement({
   ajax: function (work: IAjaxRequest) {
      ...
   }
}

But I'm getting an build error Property 'implement' does not exist on type 'typeof IAjaxAdapter'.

My d.ts looks like this right now but obviously it's a bit wrong

export class IAjaxAdapterInstance {
    constructor(any: any);
    ajax: (request: IAjaxRequest) => void;
}
export class IAjaxAdapter {
    implement: IAjaxAdapterInstance;
}

I'm not sure if this is possible, if not I guess I could any type it... but I was hoping for something.

Oblosys · Accepted Answer · 2017-10-21 12:21:33Z

1

Just looking at the types, since you're using implement as a static property that refers to a class rather than an object, it should type if you add a static and a typeof:

export class IAjaxAdapter {
    static implement: typeof IAjaxAdapterInstance;
}

answered Oct 21, 2017 at 12:21

Oblosys

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1 Comment

k2snowman69 Over a year ago

That worked beautifully! Also, I had no idea you could use static and typeof in a definition file, yay learning!

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