Using ajv-formats with deno fails

[iherman]

Using ajv-formats with TypeScript+deno (version 1.37.1) fails. I use the 'usual' idiom:

import addFormats from 'npm:ajv-formats':
.
.
.
addFormat(ajv);

and the compiler complains saying "This expression is not callable, [...]import [...] has no call signatures".

The same construction works with node.js+tsc.

I also looked at the index.d.ts file, as cached on my machine by deno, and it does not include any reference to addFormat at all, although the index.js file has it, but is not part of the exported formatsPlugin object.

Is this a deno bug or a bug with the distribution of ajv-formats?

[zdila]

You can try

import addFormats from "https://esm.sh/[email protected]";

[silverwind]

Got the same issue with v3.0.1 with vite/node using typescript 5.4.5, the type definition resolves to this which has no call signature:

export interface FormatsPlugin extends Plugin<FormatsPluginOptions> {
    get: (format: FormatName, mode?: FormatMode) => Format;
}

[mosoriorian]

Any resolution on this?
I have the same problem in Node 20 with Typesript 5.5.3 and moduleResolution: node16.

[leppaott]

Needs to fix the export ajv like ajv-validator/ajv#2381 ajv-validator/ajv-keywords#388 etc
Workaround for now: microsoft/TypeScript#50058 (comment)

import _addFormats from 'ajv-formats';
const addFormats = _addFormats as unknown as typeof _addFormats.default;

[fuji44]

Although this is a tentative response, it can be avoided by either (deno 1.46.3)

import { Ajv, type Plugin } from "npm:[email protected]";
import ajvFormats, { type FormatsPluginOptions } from "npm:[email protected]";
const addFormats = ajvFormats as unknown as Plugin<FormatsPluginOptions>;

// The version of ajv must match the dependency on [email protected].
import Ajv from "https://esm.sh/[email protected]";
import addFormats from "https://esm.sh/[email protected]";