I need help implementing the following JavaScript code into my web app to ensure that all fields are filled out before allowing the information to be processed. Where and how should I include the function to check if all fields are populated?
// Here is a JavaScript snippet that disables form submissions until all fields are filled
(function () {
'use strict'
// Find all forms that need custom validation
var forms = document.querySelectorAll('.needs-validation')
// Go through each form and prevent submission
Array.prototype.slice.call(forms)
.forEach(function (form) {
form.addEventListener('submit', function (event) {
if (!form.checkValidity()) {
event.preventDefault()
event.stopPropagation()
}
form.classList.add('was-validated')
}, false)
})
})()