react-post-cra-boilerplate/templates/utils/validators.js

Simple scripts to setup reactjs project the way i prefer

import { SubmissionError } from 'redux-form'

//Validators used with redux-form
export const required = value => (value ? undefined : 'Required');

export const maxLength = max => value => (value && value.length > max ? `Must be ${max} characters or less` : undefined);

export const minLength = min => value => (value && value.length < min ? `Must be ${min} characters or more` : undefined);

export const number = value => (value && isNaN(Number(value)) ? 'Must be a number' : undefined);

export const minValue = min => value => value && value < min ? `Must be at least ${min}` : undefined;

export const email = value => value && !/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value) ? 'Invalid email address' : undefined;

export const alphaNumeric = value => value && /[^a-zA-Z0-9 ]/i.test(value) ? 'Only alphanumeric characters' : undefined;

export const handleFormSubmitError = err => {
    if (err instanceof String)
        err = {_error: err};
    throw new SubmissionError(err);
}