7.0 causes error when used in project with typescript strict null checks

[bbarry]

Summary

I'm submitting a:

• bug report
• feature request
• question / support request
• other

Description

> ng build --aot --prod --subresource-integrity

√ Browser application bundle generation complete.

Error: node_modules/ng-recaptcha/recaptcha/recaptcha.component.d.ts:6:59 - error TS2344: Type '(() => void) | undefined' does not satisfy the constraint '(...args: any) => any'.
  Type 'undefined' is not assignable to type '(...args: any) => any'.

6 export declare type RecaptchaErrorParameters = Parameters<ReCaptchaV2.Parameters["error-callback"]>;
                                                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/f17491e0d087ae9ba39cfcc961f1952016b20e75/types/grecaptcha/index.d.ts#L125 defines error callback as (): void (this is probably wrong but I am unable to find any documentation to correct it to submit the PR to DT) but the member "error-callback" is optional so its type includes undefined.

https://github.com/DethAriel/ng-recaptcha/blob/master/src/recaptcha/recaptcha.component.ts#L22-L24 uses this definition.

When the project is included in a project that builds with tsconfig:

{
  "compileOnSave": false,
  "compilerOptions": {
    "strictNullChecks": true,

the above error occurs.

To simplify:

// required grecaptcha partial type definition
namespace ReCaptchaV2 {
    export interface Parameters {
        "error-callback"?(): void;
    }
}

// line from recaptcha.component.ts
type RecaptchaErrorParameters = Parameters<ReCaptchaV2.Parameters["error-callback"]>;

https://www.typescriptlang.org/play?#code/HYQwtgpgzgDiDGEAEAlCBhEMAu8AWIAagExIDeAUEtUhAB4wD2ATtkgJbDYTMBmCyAAohm4CN2ZRyVGrIBEPZiwC08EABt1AIwQBrOQH4AFAEoAXEgBujdgBMA3DOoBfCq4rYAnjGRo1OfBAAUWYlZmFRSAkpAF4kCLFogB40TACCEgA6BKieKABtBVCVNU0deH0AXQA+eyA

open tsconfig and toggle strictNullChecks to see the error

Lib versions:

• ng-recaptcha: 7.0.0
• Angular: 11.0.5
• Typescript (tsc --version): 4.1.3

[DethAriel]

Published in v7.0.1