Re-use validators on the front end? about express-validator HOT 3 CLOSED

// data you need to validate
const name = 'Federico'
const age = 21

// helper function
const validate = validations => {
  return async (req, res, next) => {
    for (let validation of validations) {
      const result = await validation.run(req);
      if (result.errors.length) break;
    }

    const errors = validationResult(req);
    return errors.array()
  };
};

const validators = [
  body('name').isString().isLength({ min: 4, max: 20 }),
  body('age').isInt(),
]

const validationChain = validate(validators)
const req = {
  body: {
    name,
    age
  }
}
const errors = await validationChain.run(req) // You can then reuse req.body to compose the request to the server
if errors.length === 0 {
  // perform server request here
} else {
  // handle errors in the UI
}