form-validate-av/index.js

React Form Validator

const isEmail = (value) => {
    const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return regex.test(value) ? null : "Invalid email format";
  };
  
  const isRequired = (value) => {
    return value ? null : "This field is required";
  };
  
  const minLength = (value, length) => {
    return value.length >= length ? null : `Must be at least ${length} characters`;
  };
  
  const validateForm = (values, rules) => {
    let errors = {};
  
    for (const field in rules) {
      for (const rule of rules[field]) {
        const error = rule(values[field]);
        if (error) {
          errors[field] = error;
          break;
        }
      }
    }
  
    return errors;
  };
  module.exports = { isEmail, isRequired, minLength, validateForm };