Почему метод объекта не является функцией?

const Validator = function(options) { 
  const form = document.getElementById(options.id), 
    elementsForm = [...form.elements].filter(item => item.tagName !== 'BUTTON'), 
    error = new Set(), 
    pattern = { 
      email: /^\w+@\w+\.\w+$/, 
      phone: /^\+?[78]([()-]*\d){10}$/ 
    }, 
 
    validorMethod = { 
      notEmpty(elem) { 
        if (elem.value.trim() === "") { 
          return false; 
        } 
        return true; 
      }, 
      pattern(elem, pattern) { 
        return pattern.test(elem.value); 
      } 
    } 
 
  const isValid = (elem) => { 
    const method = options.method[elem.id]; 
    if (method !== undefined) { 
      return method.every(item => validorMethod[item[0]](elem, pattern[item[1]])); 
    } 
    return true; 
  }; 
  const checkIt = (event) => { 
    let target = event.target; 
    if (isValid(target)) { 
      showSuccess(target); 
      error.delete(target); 
    } else { 
      showError(target); 
      error.add(target); 
    } 
    console.log(error); 
  }; 
  elementsForm.forEach((elem) => { 
    elem.addEventListener('change', checkIt); 
  }); 
 
  const showError = (elem) => { 
    elem.classList.remove('validator_success'); 
    elem.classList.add('validator_error'); 
    if (!elem.nextElementSibling.classList.contains('error-message')) { 
      const errorDiv = document.createElement('div'); 
      errorDiv.textContent = "You have an error there"; 
      errorDiv.classList.add('error-message'); 
      elem.insertAdjacentElement('afterend', errorDiv); 
    } 
  }; 
 
  const showSuccess = (elem) => { 
    elem.classList.remove('validator_error'); 
    elem.classList.add('validator_success'); 
    if (elem.nextElementSibling.classList.contains('error-message')) { 
      elem.nextElementSibling.remove(); 
    } 
  }; 
 
  for (let key in options.pattern) { 
    pattern[key] = options.pattern[key]; 
  }; 
 
  form.addEventListener('submit', (event) => { 
    elementsForm.forEach((elem) => { 
      checkIt({ 
        target: elem 
      }); 
    }); 
    if (error.size) { 
      event.preventDefault(); 
    } 
  }) 
}; 
 
const valid = new Validator({ 
  id: 'myform', 
  pattern: { 
    phone: /^\+380\w{9}/ 
  }, 
  method: { 
    'email': [ 
      ['notEmpty'], 
      ['patern', 'email'] 
    ], 
    'phone': [ 
      ['notEmpty'], 
      ['patern', 'phone'] 
    ] 
  } 
});

<section> 
  <form id="myform"> 
    <label for="email">email</label> 
    <input type="text" name="email" id="email"> 
    <label for="phone">phone</label> 
    <input type="text " name="phone" id="phone"> 
    <br> 
    <button type="submit">submit</button> 
    <button type="reset">reset</button> 
  </form> 
</section>