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const emailInput = document.querySelector('.pn-modal__input'); const emailRegExp = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/; const errorMessage = document.querySelector('.pn-modal__error-message'); const submitButton = document.querySelector('.pn-modal__button') let successScreen = document.getElementById('successScreen'); let initialScreen = document.getElementById('initialScreen'); /** @function showErrorMessage * @param {boolean} isErrorMessageShowing * @param {string} message */ const showErrorMessage = (isErrorMessageShowing, message) => { emailInput.classList[isErrorMessageShowing ? 'add' : 'remove']('pn-modal__input--invalid'); submitButton.disabled = !!isErrorMessageShowing; errorMessage.innerText = message; } /* SubmitButton EventListener user input when the email on successfull submission */ submitButton.addEventListener('click', () => { if (emailRegExp.test(emailInput.value)) { templateScope = angular.element('.pn-modal').scope(); window.parent.postMessage({ pianoUserEmail: emailInput.value }, '*'); successScreen.style.display = 'flex'; initialScreen.style.display = 'none'; } }); /* EventListener that removes the error message and disables the submit button when the input field is not on focus. */ emailInput.addEventListener('blur', () => { if (emailInput.value === '') { showErrorMessage(false, ''); submitButton.disabled = true; } }); /* EventListener to enable / disable error the message notification based on users input */ emailInput.addEventListener('input', () => { if (emailRegExp.test(emailInput.value)) { showErrorMessage(false, ''); } else if (emailInput.value === '') { showErrorMessage(true, 'Please enter your email'); } else { showErrorMessage(true, 'Please enter a valid email'); } })