Created
August 12, 2018 17:12
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Javascript File to Submit Html Form
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(function() { | |
function validEmail(email) { | |
var re = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i; | |
return re.test(email); | |
} | |
function validateHuman(honeypot) { | |
if (honeypot) { //if hidden form filled up | |
console.log("Robot Detected!"); | |
return true; | |
} else { | |
console.log("Welcome Human!"); | |
} | |
} | |
// get all data in form and return object | |
function getFormData(form) { | |
var elements = form.elements; | |
var fields = Object.keys(elements).filter(function(k) { | |
return (elements[k].name !== "honeypot"); | |
}).map(function(k) { | |
if(elements[k].name !== undefined) { | |
return elements[k].name; | |
// special case for Edge's html collection | |
}else if(elements[k].length > 0){ | |
return elements[k].item(0).name; | |
} | |
}).filter(function(item, pos, self) { | |
return self.indexOf(item) == pos && item; | |
}); | |
var formData = {}; | |
fields.forEach(function(name){ | |
var element = elements[name]; | |
// singular form elements just have one value | |
formData[name] = element.value; | |
// when our element has multiple items, get their values | |
if (element.length) { | |
var data = []; | |
for (var i = 0; i < element.length; i++) { | |
var item = element.item(i); | |
if (item.checked || item.selected) { | |
data.push(item.value); | |
} | |
} | |
formData[name] = data.join(', '); | |
} | |
}); | |
// add form-specific values into the data | |
formData.formDataNameOrder = JSON.stringify(fields); | |
formData.formGoogleSheetName = form.dataset.sheet || "responses"; // default sheet name | |
formData.formGoogleSendEmail = form.dataset.email || ""; // no email by default | |
console.log(formData); | |
return formData; | |
} | |
function handleFormSubmit(event) { // handles form submit without any jquery | |
event.preventDefault(); // we are submitting via xhr below | |
var form = event.target; | |
var data = getFormData(form); // get the values submitted in the form | |
/* OPTION: Remove this comment to enable SPAM prevention, see README.md | |
if (validateHuman(data.honeypot)) { //if form is filled, form will not be submitted | |
return false; | |
} | |
*/ | |
if( data.email && !validEmail(data.email) ) { // if email is not valid show error | |
var invalidEmail = form.querySelector(".email-invalid"); | |
if (invalidEmail) { | |
invalidEmail.style.display = "block"; | |
return false; | |
} | |
} else { | |
disableAllButtons(form); | |
var url = form.action; | |
var xhr = new XMLHttpRequest(); | |
xhr.open('POST', url); | |
// xhr.withCredentials = true; | |
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); | |
xhr.onreadystatechange = function() { | |
console.log(xhr.status, xhr.statusText); | |
console.log(xhr.responseText); | |
var formElements = form.querySelector(".form-elements") | |
if (formElements) { | |
formElements.style.display = "none"; // hide form | |
} | |
var thankYouMessage = form.querySelector(".thankyou_message"); | |
if (thankYouMessage) { | |
thankYouMessage.style.display = "block"; | |
} | |
return; | |
}; | |
// url encode form data for sending as post data | |
var encoded = Object.keys(data).map(function(k) { | |
return encodeURIComponent(k) + "=" + encodeURIComponent(data[k]); | |
}).join('&'); | |
xhr.send(encoded); | |
} | |
} | |
function loaded() { | |
console.log("Contact form submission handler loaded successfully."); | |
// bind to the submit event of our form | |
var forms = document.querySelectorAll("form.gform"); | |
for (var i = 0; i < forms.length; i++) { | |
forms[i].addEventListener("submit", handleFormSubmit, false); | |
} | |
}; | |
document.addEventListener("DOMContentLoaded", loaded, false); | |
function disableAllButtons(form) { | |
var buttons = form.querySelectorAll("button"); | |
for (var i = 0; i < buttons.length; i++) { | |
buttons[i].disabled = true; | |
} | |
} | |
})(); |
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