Not working when upgrading to Angular 12

[olegkap]

IMPORTANT:
Please be specific with an example. An issue with

Upgrade any application from Angular 11 to Angular 12

Current behavior
Fails to compile with following error:

Error: node_modules/ngx-custom-validators/src/app/url/directive.d.ts:8:25 - error TS2694: Namespace '"C:/Projects/***********/ClientApp/node_modules/ngx-custom-validators/node_modules/@angular/core/core"' has no exported member 'ɵɵDirectiveDeclaration'.

Expected/desired behavior

Compile succefully

Environment information

• OS: Windows 10
• Angular Version: 12
• Typescript version: 4.2.4
• npm version: 6.14.9
• Node Version: v14.16.0

Other information

[jsanta]

Made a pull request for this. Tests are passing without problems.
https://github.com/jsanta/ngx-custom-validators

[kuth-chi]

`Error: node_modules/ngx-custom-validators/node_modules/@angular/forms/forms.d.ts:4283:25 - error TS2694: Namespace '"Projects/node_modules/ngx-custom-validators/node_modules/@an
gular/core/core"' has no exported member 'ɵɵDirectiveDeclaration'.

4283 static ɵdir: ɵngcc0.ɵɵDirectiveDeclaration<ɵNgNoValidate, "form:not([ngNoForm]):not([ngNativeValidate])", never, {}, {}, never>;
~~~~~~~~~~~~~~~~~~~~~~

Error: node_modules/ngx-custom-validators/node_modules/@angular/forms/forms.d.ts:4318:25 - error TS2694: Namespace '"Projects/node_modules/ngx-custom-validators/node_modules/@an
gular/core/core"' has no exported member 'ɵɵFactoryDeclaration'.

4318 static ɵfac: ɵngcc0.ɵɵFactoryDeclaration<ɵNgSelectMultipleOption, [null, null, { optional: true; host: true; }]>;
~~~~~~~~~~~~~~~~~~~~

Error: node_modules/ngx-custom-validators/node_modules/@angular/forms/forms.d.ts:4319:25 - error TS2694: Namespace '"Projects/node_modules/ngx-custom-validators/node_modules/@an
gular/core/core"' has no exported member 'ɵɵDirectiveDeclaration'.

4319 static ɵdir: ɵngcc0.ɵɵDirectiveDeclaration<ɵNgSelectMultipleOption, "option", never, { "ngValue": "ngValue"; "value": "value"; }, {}, never>;
`

I am also facing this problem.
How to fix it please?

[abadakhshan]

There is a pull request for fixing the problem but It has not been applied for a long time. I created my package to use it

https://www.npmjs.com/package/@narik/custom-validators

[davifsroberto]

it worked here: https://stackoverflow.com/questions/68220000/how-to-fix-ngx-custom-validator-in-angular-12/68746402#68746402