fix: error TS2503: Cannot find namespace 'ValidatorJS'.

Just installed class-validator into a new Nest.js project, also manually intalled types.

Getting the above error for basically all validators when trying to start app:

node_modules/class-validator/validation/Validator.d.ts:383:38 - error TS2503: Cannot find namespace 'ValidatorJS'.

383     isISSN(value: unknown, options?: ValidatorJS.IsISSNOptions): boolean;

[zcong1993]

@cjancsar try to add this to your tsconfig.json

{
  "compilerOptions": {
    ...
    "typeRoots": ["./node_modules/*/node_modules/@types/"]
  }
...
}

[cjancsar]

@vlapo I need validator and @types/validator because I am using sequelize-typescript (https://www.npmjs.com/package/sequelize-typescript) which also has them as a dependency. They should be made peer depedencies of this lib to avoid conflicts like this.