Simple function to check if all required fields are filled out correctly

isFormValid.js

const isFormValid = form => {
  const elements = form && form.elements
  if (!elements) return false
  return Array.from(elements).every(elem => elem.validity && elem.validity.valid)
}

@eddiemoore Throws when form is undefined but otherwise similar behaviour in the for/of style.

function isFormValid ({elements}) {
  for (const {validity} of Array.from(elements)) {
    if (validity && !validity.valid) return false
  }
  return true
}