Submitting a canvas element in a form - javascript

I have managed to get this far from various tutorials and answers posted on other questions but i am now stuck. I have this form
HTML
<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://fonts.googleapis.com/css?family=Raleway"
rel="stylesheet">
<link rel="stylesheet" href="style.css">
<body>
<form id="regForm" action="sqlIn.php" method="post">
<h1>Welcome</h1>
<!-- One "tab" for each step in the form: -->
<div class="tab">
<div id="capture"><video id="player" autoplay><canvas id="canvas">
</canvas></video></div>
<script src="camera.js"></script>
<p><input placeholder="First name..." oninput="this.className = ''"
name="fname">
<input placeholder="Last name..." oninput="this.className = ''"
name="lname"></p>
</div>
<!-- One "tab" for each step in the form: -->
<div class="tab">How can we contact you whilst on site?
<p><input placeholder="Phone number" oninput="this.className = ''"
name="Dir_phone"></p>
</div>
<!-- One "tab" for each step in the form: -->
<div class="tab">Who do you work for?
<p><input placeholder="dd" oninput="this.className = ''" name="dd"></p>
</div>
<!-- One "tab" for each step in the form: -->
<div class="tab">Please read our Induction:
<p><input placeholder="Username..." oninput="this.className = ''"
name="uname"></p>
</div>
<!-- One "tab" for each step in the form: -->
<div style="overflow:auto;">
<div style="float:right;">
<button type="button" id="prevBtn"
onclick="nextPrev(-1)">Previous</button>
<button type="button" id="nextBtn" onclick="nextPrev(1)">Next</button>
</div>
</div>
<!-- Circles which indicates the steps of the form: -->
<div style="text-align:center;margin-top:40px;">
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
</div>
</form>
<!-- Link to the javascript for form animation/flow -->
<script src="form.js"></script>
</body>
</html>
CSS
'* {
box-sizing: border-box;
}
html {
background: url(wood-is-at-the-heart.jpg) no-repeat center center fixed;
-webkit-background-size: cover;
-moz-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
#regForm {
background-color: #ffffff;
margin: 100px auto;
border-radius: 10px;
box-shadow: 4px 4px 3px #245223;
font-family: Raleway;
padding: 40px;
width: 70%;
min-width: 300px;
}
h1 {
text-align: center;
}
input {
padding: 10px;
width: 100%;
font-size: 17px;
font-family: Raleway;
border: 1px solid #aaaaaa;
}
/* Mark input boxes that gets an error on validation: */
input.invalid {
background-color: #ffdddd;
}
/* Hide all steps by default: */
.tab {
display: none;
}
button {
background-color: #4CAF50;
color: #ffffff;
border: none;
padding: 10px 20px;
font-size: 17px;
font-family: Raleway;
cursor: pointer;
}
button:hover {
opacity: 0.8;
}
#prevBtn {
background-color: #bbbbbb;
}
/* Make circles that indicate the steps of the form: */
.step {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbbbbb;
border: none;
border-radius: 50%;
display: inline-block;
opacity: 0.5;
}
.step.active {
opacity: 1;
}
/* Mark the steps that are finished and valid: */
.step.finish {
background-color: #4CAF50;
}
#player{
display: inline-block;
height:400px;
width:500px;
margin: 0px;
}
#capture{
diplay:inline;
padding: 0px;
height:400px;
width:500px;
margin: 0 auto;
}
and Finally JS
var currentTab = 0; // Current tab is set to be the first tab (0)
showTab(currentTab); // Display the crurrent tab
function showTab(n) {
// This function will display the specified tab of the form...
var x = document.getElementsByClassName("tab");
x[n].style.display = "block";
//... and fix the Previous/Next buttons:
if (n == 0) {
document.getElementById("prevBtn").style.display = "none";
} else {
document.getElementById("prevBtn").style.display = "inline";
}
if (n == x.length - 1) {
document.getElementById("nextBtn").innerHTML = "Submit";
} else {
document.getElementById("nextBtn").innerHTML = "Next";
}
//... and run a function that will display the correct step indicator:
fixStepIndicator(n);
}
function nextPrev(n) {
// This function will figure out which tab to display
var x = document.getElementsByClassName("tab");
// Exit the function if any field in the current tab is invalid:
if (n == 1 && !validateForm()) return false;
// Hide the current tab:
x[currentTab].style.display = "none";
// Increase or decrease the current tab by 1:
currentTab = currentTab + n;
// if you have reached the end of the form...
if (currentTab >= x.length) {
// ... the form gets submitted:
document.getElementById("regForm").submit();
return false;
}
// Otherwise, display the correct tab:
showTab(currentTab);
}
function validateForm() {
// This function deals with validation of the form fields
var x,
y,
i,
valid = true;
x = document.getElementsByClassName("tab");
y = x[currentTab].getElementsByTagName("input");
// A loop that checks every input field in the current tab:
for (i = 0; i < y.length; i++) {
// If a field is empty...
if (y[i].value == "") {
// add an "invalid" class to the field:
y[i].className += " invalid";
// and set the current valid status to false
valid = false;
}
}
// If the valid status is true, mark the step as finished and valid:
if (valid) {
document.getElementsByClassName("step")[currentTab].className += "
finish";
}
return valid; // return the valid status
}
function fixStepIndicator(n) {
// This function removes the "active" class of all steps...
var i,
x = document.getElementsByClassName("step");
for (i = 0; i < x.length; i++) {
x[i].className = x[i].className.replace(" active", "");
}
//... and adds the "active" class on the current step:
x[n].className += " active";
}
// and the code to show camera and get the image to a canvas.
const player = document.getElementById('player');
const canvas = document.getElementById('canvas');
const context = canvas.getContext('2d');
const captureButton = document.getElementById('capture');
const constraints = {
video: true,
};
captureButton.addEventListener('click', () => {
context.drawImage(player, 0, 0, canvas.width, canvas.height);
// Stop all video streams.
player.srcObject.getVideoTracks().forEach(track => track.stop());
});
navigator.mediaDevices.getUserMedia(constraints)
.then((stream) => {
// Attach the video stream to the video element and autoplay.
player.srcObject = stream;
});
I have tried various options of putting the canvas image in a variable and then setting a hidden input as that but cannot seem to get anywhere with it? i have all the other elements of the form being submitted by post to a mysql database
Once this is done i will be moving on to form logic and going to questions based on conditions then after that autofill to check if there is already an entry. I am learning as i am going as my previous knowledge comes from before CSS was a thing. You can view it in codepen
See the Pen Web Form by mark (#markarobinson) on CodePen.
I will try my best to answer any questions if more information is needed.
Thank you

Related

Redirect multi-step form

I not able to set up a redirect the form to a specific page/url after submitting the form.
I tried to put the following code
return window.location.href='index3.html';
right after
document.getElementById("regForm").submit();
but I got no data submitted, only redirect...
Can someone help please?
<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet">
<style>
* {
box-sizing: border-box;
}
body {
background-color: #f1f1f1;
}
#regForm {
background-color: #ffffff;
margin: 100px auto;
font-family: Raleway;
padding: 40px;
width: 70%;
min-width: 300px;
}
h1 {
text-align: center;
}
input {
padding: 10px;
width: 100%;
font-size: 17px;
font-family: Raleway;
border: 1px solid #aaaaaa;
}
/* Mark input boxes that gets an error on validation: */
input.invalid {
background-color: #ffdddd;
}
/* Hide all steps by default: */
.tab {
display: none;
}
button {
background-color: #04AA6D;
color: #ffffff;
border: none;
padding: 10px 20px;
font-size: 17px;
font-family: Raleway;
cursor: pointer;
}
button:hover {
opacity: 0.8;
}
#prevBtn {
background-color: #bbbbbb;
}
/* Make circles that indicate the steps of the form: */
.step {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbbbbb;
border: none;
border-radius: 50%;
display: inline-block;
opacity: 0.5;
}
.step.active {
opacity: 1;
}
/* Mark the steps that are finished and valid: */
.step.finish {
background-color: #04AA6D;
}
</style>
<body>
<form id="regForm" action="config.php">
<h1>Register:</h1>
<!-- One "tab" for each step in the form: -->
<div class="tab">Name:
<p><input placeholder="First name..." oninput="this.className = ''" name="fname"></p>
<p><input placeholder="Last name..." oninput="this.className = ''" name="lname"></p>
</div>
<div class="tab">Contact Info:
<p><input placeholder="E-mail..." oninput="this.className = ''" name="email"></p>
<p><input placeholder="Phone..." oninput="this.className = ''" name="phone"></p>
</div>
<div class="tab">Birthday:
<p><input placeholder="dd" oninput="this.className = ''" name="dd"></p>
<p><input placeholder="mm" oninput="this.className = ''" name="nn"></p>
<p><input placeholder="yyyy" oninput="this.className = ''" name="yyyy"></p>
</div>
<div class="tab">Login Info:
<p><input placeholder="Username..." oninput="this.className = ''" name="uname"></p>
<p><input placeholder="Password..." oninput="this.className = ''" name="pword" type="password"></p>
</div>
<div style="overflow:auto;">
<div style="float:right;">
<button type="button" id="prevBtn" onclick="nextPrev(-1)">Previous</button>
<button type="button" id="nextBtn" onclick="nextPrev(1)">Next</button>
</div>
</div>
<!-- Circles which indicates the steps of the form: -->
<div style="text-align:center;margin-top:40px;">
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
</div>
</form>
<script>
var currentTab = 0; // Current tab is set to be the first tab (0)
showTab(currentTab); // Display the current tab
function showTab(n) {
// This function will display the specified tab of the form...
var x = document.getElementsByClassName("tab");
x[n].style.display = "block";
//... and fix the Previous/Next buttons:
if (n == 0) {
document.getElementById("prevBtn").style.display = "none";
} else {
document.getElementById("prevBtn").style.display = "inline";
}
if (n == (x.length - 1)) {
document.getElementById("nextBtn").innerHTML = "Submit";
} else {
document.getElementById("nextBtn").innerHTML = "Next";
}
//... and run a function that will display the correct step indicator:
fixStepIndicator(n)
}
function nextPrev(n) {
// This function will figure out which tab to display
var x = document.getElementsByClassName("tab");
// Exit the function if any field in the current tab is invalid:
if (n == 1 && !validateForm()) return false;
// Hide the current tab:
x[currentTab].style.display = "none";
// Increase or decrease the current tab by 1:
currentTab = currentTab + n;
// if you have reached the end of the form...
if (currentTab >= x.length) {
// ... the form gets submitted:
document.getElementById("regForm").submit();
return false;
}
// Otherwise, display the correct tab:
showTab(currentTab);
}
function validateForm() {
// This function deals with validation of the form fields
var x, y, i, valid = true;
x = document.getElementsByClassName("tab");
y = x[currentTab].getElementsByTagName("input");
// A loop that checks every input field in the current tab:
for (i = 0; i < y.length; i++) {
// If a field is empty...
if (y[i].value == "") {
// add an "invalid" class to the field:
y[i].className += " invalid";
// and set the current valid status to false
valid = false;
}
}
// If the valid status is true, mark the step as finished and valid:
if (valid) {
document.getElementsByClassName("step")[currentTab].className += " finish";
}
return valid; // return the valid status
}
function fixStepIndicator(n) {
// This function removes the "active" class of all steps...
var i, x = document.getElementsByClassName("step");
for (i = 0; i < x.length; i++) {
x[i].className = x[i].className.replace(" active", "");
}
//... and adds the "active" class on the current step:
x[n].className += " active";
}
</script>
</body>
</html>
....``
It seems that this is part of the solution:
include "/config/config.php";
Reference this for more details.

JavaScript modal will only close after the first time opening it but not after the second time

I'm making a note taker app that gives you the option to view said note in a modal whenever the button is clicked. There are two ways the close it by clicking the "X" button or by clicking outside of the modal.
When I proceed with one of these options, the modal will close successfully, but if I open it a second time neither the "X" button or clicking outside seem to work. How could I fix this problem?
class Input {
constructor(note) {
this.note = note;
}
}
class UI {
addNote(input) {
// Get table body below form
const content = document.querySelector(".content");
// Create tr element
const row = document.createElement("tr");
// Insert new HTML into div
row.innerHTML = `
<td>
${input.note}
<br><br>
<button class="modalBtn">View Note</button>
</td>
`;
content.appendChild(row);
// Event listener to make modal
document.querySelector(".modalBtn").addEventListener("click", function(e) {
// Get container div
const container = document.querySelector(".container");
// Create div
const div = document.createElement("div");
// Assign class to it
div.className = "modal";
// Insert HTML into div
div.innerHTML = `
<div class="modal-content">
<span class="closeBtn">×</span>
<div>
<p>${input.note}</p>
</div>
</div>
`;
// Append the new div to the container div
container.appendChild(div);
// Get modal
const modal = document.querySelector(".modal");
// Event listener to close modal when "x" is clicked
document.querySelector(".closeBtn").addEventListener("click", function() {
modal.style.display = "none";
});
// Event listener to close when the window outside the modal is clicked
window.addEventListener("click", function(e) {
if (e.target === modal) {
modal.style.display = "none";
}
});
});
}
// Clear input field
clearInput() {
note.value = "";
}
}
// Event listener for addNote
document.getElementById("note-form").addEventListener("submit", function(e) {
// Get form value
const note = document.getElementById("note").value;
// Instantiate note
const input = new Input(note);
// Instantiate UI
const ui = new UI();
// Validate form (make sure input is filled)
if (note === "") {
// Error alert
alert("Please fill in text field!");
}
else {
// Add note
ui.addNote(input);
// Clear input field
ui.clearInput();
}
e.preventDefault();
});
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 17px;
line-height: 1.6;
}
.button {
background: coral;
padding: 1em 2em;
color: #fff;
border: 0;
}
.button:hover {
background: #333;
}
.modal {
display: none;
position: fixed;
z-index: 1;
left: 0;
top: 0;
height: 100%;
width: 100%;
overflow: auto;
background-color: rgba(0, 0, 0, 0.5);
}
.modal-content {
background-color: #f4f4f4;
margin: 20% auto;
padding: 20px;
width: 70%;
box-shadow: 0 5px 8px 0 rgba(0, 0, 0, 0.2), 0 7px 20px 0 rgba(0, 0, 0, 0.17);
animation-name: modalopen;
animation-direction: 1s;
}
.closeBtn {
color: #ccc;
float: right;
font-size: 30px;
}
.closeBtn:hover,
.closeBtnBtn:focus {
color: #000;
text-decoration: none;
cursor: pointer;
}
#keyframes modalopen {
from {
opacity: 0;
}
to {
opacity: 1;
}
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.css" integrity="sha512-5fsy+3xG8N/1PV5MIJz9ZsWpkltijBI48gBzQ/Z2eVATePGHOkMIn+xTDHIfTZFVb9GMpflF2wOWItqxAP2oLQ==" crossorigin="anonymous" />
<link rel="stylesheet" href="style.css">
<title>Note Taker</title>
</head>
<body>
<div class="container">
<h1>Note Taker</h1>
<h5>Add A New Note:</h5>
<form id="note-form">
<div>
<label>Note:</label>
<textarea name="Note" id="note" class="u-full-width"> </textarea>
</div>
<div>
<button type="submit" class="button-primary">Add Note</button>
</div>
</form>
<table>
<tbody class="content"></tbody>
</table>
</div>
<script src="app.js"></script>
</body>
</html>
That happens because when you apply
modal.style.display = "none";
to the modal, you aren't destroying it, you're only hiding it. Additionally, every time you create a modal, and use
const modal = document.querySelector(".modal");
you aren't receiving the new modal you appended to the container, you're receiving the one that it's hidden. That's why the click event doesn't work, because it's being added to the hidden modal. To fix that change,
this:
modal.style.display = "none";
to this:
container.removeChild(modal);
in both EventListeners

Rest button at the end of the quiz is not functioning

When the user gets to the end of this quiz a reset button is present. I have tried everything I can find to make the reset button work. I've added it to the top, I've wrapped in a form tag as well and tried "reset form". I'm a novice, so I would appreciate knowing what I may be doing wrong and if this is even a possibility with my current formatting.
Full code below.
var currentTab = 0; // Current tab is set to be the first tab (0)
showTab(currentTab); // Display the current tab
// Displays the specified tab of the form
function showTab(n) {
var x = document.getElementsByClassName('tab');
x[n].style.display = 'block';
// Fix the Previous button
if (n == 0) {
document.getElementById('prevBtn').style.display = 'none';
} else {
document.getElementById('prevBtn').style.display = 'inline';
}
// Fix the Next button
if (n == (x.length - 1)) {
document.getElementById('nextBtn').innerHTML = 'restart';
} else {
document.getElementById('nextBtn').innerHTML = 'Next';
}
// Run a function that will display the correct step indicator
fixStepIndicator(n)
}
// Figures out which tab to display
function nextPrev(n) {
var x = document.getElementsByClassName('tab');
// Exit the function if any field in the current tab is invalid
if (n == 1 && !validateForm()) return false;
// Hide the current tab
x[currentTab].style.display = 'none';
// Increase or decrease the current tab by 1
currentTab = currentTab + n;
// if you have reached the end of the form...
if (currentTab >= x.length) {
// ... the form gets restarted:
document.getElementById('regForm').restart();
return false;
}
// Otherwise, display the correct tab:
showTab(currentTab);
}
// Validates the form fields
function validateForm() {
var x, y, i, valid = true;
x = document.getElementsByClassName('tab');
y = x[currentTab].getElementsByTagName('input');
// Checks every input field in the current tab:
for (i = 0; i < y.length; i++) {
// If a field is empty...
if (y[i].value == '') {
// add an "invalid" class to the field
y[i].className += ' invalid';
// and set the current valid status to false
valid = false;
}
}
// If the valid status is true, mark the step as finished and valid:
if (valid) {
document.getElementsByClassName('step')[currentTab].className += ' finish';
}
return valid; // return the valid status
}
// Removes the "active" class of all steps
function fixStepIndicator(n) {
var i, x = document.getElementsByClassName('step');
for (i = 0; i < x.length; i++) {
x[i].className = x[i].className.replace(' active', '');
}
//... and add the "active" class on the current step
x[n].className += ' active';
}
function yesnoCheck() {
if (document.getElementById('yesCheck').checked) {
document.getElementById('ifYes').style.display = 'block';
} else {
document.getElementById('ifYes').style.display = 'none';
}
if (document.getElementById('noCheck').checked) {
document.getElementById('ifNo').style.display = 'block';
} else {
document.getElementById('ifNo').style.display = 'none';
}
}
function yesno1Check() {
if (document.getElementById('yes1Check').checked) {
document.getElementById('ifYes1').style.display = 'block';
} else {
document.getElementById('ifYes1').style.display = 'none';
}
if (document.getElementById('no1Check').checked) {
document.getElementById('ifNo1').style.display = 'block';
} else {
document.getElementById('ifNo1').style.display = 'none';
}
}
* {
box-sizing: border-box;
}
body {
background-color: #f1f1f1;
padding-bottom: 5rem;
}
#regForm {
background-color: #ffffff;
margin: 50px auto;
font-family: calibri;
font-size: 17px
padding: 40px;
width: 30%;
min-width: 300px;
}
h1 {
text-align: center;
}
input {
padding: 10px;
width: 100%;
font-size: 17px;
font-family: Raleway;
border: 1px solid #aaaaaa;
}
/* Mark input boxes that gets an error on validation: */
input.invalid {
background-color: #ffdddd;
}
/* Hide all steps by default: */
.tab {
display: none;
}
button {
background-color: #0000ff;
color: #ffffff;
border: none;
padding: 10px 20px;
font-size: 17px;
font-family: Raleway;
cursor: pointer;
}
button:hover {
opacity: 0.8;
}
#prevBtn {
background-color: #bbbbbb;
}
/* Make circles that indicate the steps of the form: */
.step {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbbbbb;
border: none;
border-radius: 50%;
display: inline-block;
opacity: 0.5;
}
.step.active {
opacity: 1;
}
/* Mark the steps that are finished and valid: */
.step.finish {
background-color: #0000ff;
}
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet" />
<span style="font-family: calibri; font-size: 12pt;">
<form id="regForm" style="float: left;">
<h1 style="text-align: left;">Voicemail Troubleshooting</h1>
<!-- One "tab" for each step in the form: -->
<div class="tab">
Is the accurate SKU on the LOS?<br /><br />
Yes <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="yesCheck">
No <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="noCheck"><br />
</div>
<div class="tab">
Tab 2
<div id="ifNo" style="display: none">
Result of selecting No to first question
</div>
<div id="ifYes" style="display: none"><br /><br />
Can the customer call the VM from their phone?<br /><br />
Yes <input type="radio" onclick="javascript:yesno1Check();" name="yesno1" id="yes1Check">
No <input type="radio" onclick="javascript:yesno1Check();" name="yesno1" id="no1Check"><br />
</div>
</div>
<div class="tab">
Tab 3
<div id="ifYes1" style="display:none"><br />
Result of selecting Yes to second question.
</div>
<div id="ifNo1" style="display:none">
Result of selecting No to second question</div>
</div>
<div style="overflow: auto;">
<div style="float: right;">
<br /><br />
<button type="button" id="prevBtn" onclick="nextPrev(-1)">Previous</button>
<button type="button" id="nextBtn" onclick="nextPrev(1)">Next</button>
</div>
</div>
<!-- Circles which indicates the steps of the form: -->
<div style="text-align: center; margin-top: 40px;">
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
</div>
</form>
</span>
I think it what you want -
<link href="https://fonts.googleapis.com/css?family=Raleway" rel="stylesheet" />
<style>
* {
box-sizing: border-box;
}
body {
background-color: #f1f1f1;
}
#regForm {
background-color: #ffffff;
margin: 50px auto;
font-family: calibri;
font-size: 17px
padding: 40px;
width: 30%;
min-width: 300px;
}
h1 {
text-align: center;
}
input {
padding: 10px;
width: 100%;
font-size: 17px;
font-family: Raleway;
border: 1px solid #aaaaaa;
}
/* Mark input boxes that gets an error on validation: */
input.invalid {
background-color: #ffdddd;
}
/* Hide all steps by default: */
.tab {
display: none;
}
button {
background-color: #0000ff;
color: #ffffff;
border: none;
padding: 10px 20px;
font-size: 17px;
font-family: Raleway;
cursor: pointer;
}
button:hover {
opacity: 0.8;
}
#prevBtn {
background-color: #bbbbbb;
}
/* Make circles that indicate the steps of the form: */
.step {
height: 15px;
width: 15px;
margin: 0 2px;
background-color: #bbbbbb;
border: none;
border-radius: 50%;
display: inline-block;
opacity: 0.5;
}
.step.active {
opacity: 1;
}
/* Mark the steps that are finished and valid: */
.step.finish {
background-color: #0000ff;
}
</style>
<span style="font-family: calibri; font-size: 12pt;">
<form id="regForm" style="float: left;">
<h1 style="text-align: left;">Voicemail Troubleshooting</h1>
<!-- One "tab" for each step in the form: -->
<div class="tab">
Is the accurate SKU on the LOS?<br />
<br />
Yes <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="yesCheck">
No <input type="radio" onclick="javascript:yesnoCheck();" name="yesno" id="noCheck"><br />
</div>
<div class="tab">Tab 2
<div id="ifNo" style="display:none">
Result of selecting No to first question
</div>
<div id="ifYes" style="display:none"><br />
<br />
Can the customer call the VM from their phone?<br />
<br />
Yes <input type="radio" onclick="javascript:yesno1Check();" name="yesno1" id="yes1Check">
No <input type="radio" onclick="javascript:yesno1Check();" name="yesno1" id="no1Check"><br />
</div>
</div>
<div class="tab">Tab 3
<div id="ifYes1" style="display:none"><br />
Result of selecting Yes to second question.</div>
<div id="ifNo1" style="display:none">
Result of selecting No to second question</div>
</div>
<div style="overflow: auto;">
<div style="float: right;">
<br />
<br />
<button type="button" id="prevBtn" onclick="nextPrev(-1)">Previous</button>
<button type="button" id="nextBtn" onclick="nextPrev(1)">Next</button>
</div>
</div>
<!-- Circles which indicates the steps of the form: -->
<div style="text-align: center; margin-top: 40px;">
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
<span class="step"></span>
</div>
</form>
</span>
<script>
var currentTab = 0; // Current tab is set to be the first tab (0)
showTab(currentTab); // Display the current tab
function showTab(n) {
// This function will display the specified tab of the form...
var x = document.getElementsByClassName("tab");
x[n].style.display = "block";
//... and fix the Previous/Next buttons:
if (n == 0) {
document.getElementById("prevBtn").style.display = "none";
} else {
document.getElementById("prevBtn").style.display = "inline";
}
if (n == (x.length - 1)) {
document.getElementById("nextBtn").innerHTML = "restart";
document.getElementById("nextBtn").setAttribute('onclick', 'restart()');
} else {
document.getElementById("nextBtn").innerHTML = "Next";
}
//... and run a function that will display the correct step indicator:
fixStepIndicator(n);
}
/* Restart function */
function restart(){
var x = document.getElementsByClassName("tab");
x[x.length - 1].style.display = "none";
document.getElementById("nextBtn").setAttribute('onclick', 'nextPrev(1)');
window.currentTab = 0; // Current tab is set to be the first tab (0)
showTab(window.currentTab); // Display the current tab
}
function nextPrev(n) {
// This function will figure out which tab to display
var x = document.getElementsByClassName("tab");
// Exit the function if any field in the current tab is invalid:
if (n == 1 && !validateForm()) return false;
// Hide the current tab:
x[currentTab].style.display = "none";
// Increase or decrease the current tab by 1:
currentTab = currentTab + n;
// if you have reached the end of the form...
if (currentTab >= x.length) {
// ... the form gets restarted:
document.getElementById("regForm").restart();
return false;
}
// Otherwise, display the correct tab:
showTab(currentTab);
}
function validateForm() {
// This function deals with validation of the form fields
var x, y, i, valid = true;
x = document.getElementsByClassName("tab");
y = x[currentTab].getElementsByTagName("input");
// A loop that checks every input field in the current tab:
for (i = 0; i < y.length; i++) {
// If a field is empty...
if (y[i].value == "") {
// add an "invalid" class to the field:
y[i].className += " invalid";
// and set the current valid status to false
valid = false;
}
}
// If the valid status is true, mark the step as finished and valid:
if (valid) {
document.getElementsByClassName("step")[currentTab].className += " finish";
}
return valid; // return the valid status
}
function fixStepIndicator(n) {
// This function removes the "active" class of all steps...
var i, x = document.getElementsByClassName("step");
for (i = 0; i < x.length; i++) {
x[i].className = x[i].className.replace(" active", "");
}
//... and adds the "active" class on the current step:
x[n].className += " active";
}
</script><script>
function yesnoCheck() {
if (document.getElementById('yesCheck').checked) {
document.getElementById('ifYes').style.display= 'block';
}
else document.getElementById('ifYes').style.display= 'none';
if (document.getElementById('noCheck').checked) {
document.getElementById('ifNo').style.display= 'block';
}
else document.getElementById('ifNo').style.display= 'none';
}</script><script>
function yesno1Check() {
if (document.getElementById('yes1Check').checked) {
document.getElementById('ifYes1').style.display= 'block';
}
else document.getElementById('ifYes1').style.display= 'none';
if (document.getElementById('no1Check').checked) {
document.getElementById('ifNo1').style.display= 'block';
}
else document.getElementById('ifNo1').style.display= 'none';
}
});</script>
Working fiddle - jsfiddle link

Why do I have to click button twice before event fires?

A simple multiple choice quiz with one problem I can't solve. At first When I clicked the 'next question' button the next question and answers didn't show only when clicked a second time the next question and answers showed.
When I placed runningQuestion++ above questions[runningQuestion].displayAnswers()
like I did in the nextQuestion function the initial problem is solved but reappears after the last question when you are asked to try again. Only now when you click 'try again' now ofcourse it skips the first question.
class Question {
constructor(question, answers, correct) {
this.question = question;
this.answers = answers;
this.correct = correct;
}
displayAnswers() {
document.querySelector('.question').innerHTML = `<div class="q1">${this.question}</div>`
let i = 0
let answers = this.answers
for (let el of answers) {
let html = `<div class="name" id=${i}>${el}</div>`
document.querySelector('.answers').insertAdjacentHTML('beforeend', html)
i++
}
}
}
const q1 = new Question('What\'s the capitol of Rwanda?', ['A: Dodoma', 'B: Acra', 'C: Kigali'], 2);
const q2 = new Question('What\'s is the square root of 0?', ["A: Not possible", 'B: 0', 'C: 1'], 1);
const q3 = new Question('Who was Rome\'s first emperor?', ['A: Tiberius', 'B: Augustus', 'C: Marcus Aurelius'], 1);
const questions = [q1, q2, q3];
let runningQuestion;
let gamePlaying;
init()
document.querySelector('.button1').addEventListener('click', nextQuestion)
function nextQuestion(e) {
console.log(e.target)
if (gamePlaying === true && runningQuestion <= questions.length - 1) {
clearAnswers()
document.querySelector('.button1').textContent = 'Next Question'
runningQuestion++
questions[runningQuestion].displayAnswers()
}
if (runningQuestion >= questions.length - 1) {
document.querySelector('.button1').textContent = 'Try again!'
runningQuestion = 0
}
}
function clearAnswers() {
document.querySelectorAll('.name').forEach(el => {
el.remove()
})
}
document.querySelector('.button2').addEventListener('click', resetGame)
function resetGame() {
document.querySelector('.button1').textContent = 'Next Question'
clearAnswers()
runningQuestion = 0
questions[runningQuestion].displayAnswers()
}
function init() {
gamePlaying = true;
runningQuestion = 0;
questions[runningQuestion].displayAnswers()
}
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
.container {
display: flex;
width: 400px;
height: auto;
margin: 100px auto;
align-items: center;
flex-direction: column;
}
.question {
margin-top: 40px;
color: rgb(102, 0, 0);
font-size: 1.4rem;
}
.answers {
display: flex;
flex-direction: column;
margin-top: 10px;
height: 100px;
margin-bottom: 15px;
}
.name {
margin-top: 20px;
cursor: pointer;
color: rgb(102, 0, 0);
font-size: 1.2rem;
}
.button1 {
margin-top: 50px;
border-style: none;
width: 350px;
height: 50px;
font-size: 1.4rem;
}
ul>li {
list-style-type: none;
margin-top: 10px;
font-size: 1.2rem;
color: rgb(102, 0, 0);
height: 30px;
cursor: pointer;
display: block;
}
.button2 {
margin-top: 20px;
border-style: none;
width: 350px;
height: 50px;
font-size: 1.4rem;
}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="styles.css">
<title>Quiz</title>
</head>
<body>
<div class="container">
<div class="question"></div>
<div class="answers"></div>
<button type="button" class="button1">Next Question</button>
<button type="button" class="button2">Reset</button>
</div>
<script src="app.js"></script>
</body>
</html>
The problem with the current version is that you reset runningQuestion to 0, and when clicking on the button, you execute nextQuestion, which, as the name implies, goes to the next question (runningQuestion++).
I see 2 ways of solving this. Either the "easy" way, by resetting runningQuestion to -1 so that it goes to 0:
class Question{constructor(e,s,t){this.question=e,this.answers=s,this.correct=t}displayAnswers(){document.querySelector(".question").innerHTML=`<div class="q1">${this.question}</div>`;let e=0,s=this.answers;for(let t of s){let s=`<div class="name" id=${e}>${t}</div>`;document.querySelector(".answers").insertAdjacentHTML("beforeend",s),e++}}}const q1=new Question("What's the capitol of Rwanda?",["A: Dodoma","B: Acra","C: Kigali"],2),q2=new Question("What's is the square root of 0?",["A: Not possible","B: 0","C: 1"],1),q3=new Question("Who was Rome's first emperor?",["A: Tiberius","B: Augustus","C: Marcus Aurelius"],1),questions=[q1,q2,q3];let runningQuestion,gamePlaying;init(),document.querySelector(".button1").addEventListener("click",nextQuestion);
/* Nothing changed above */
function nextQuestion(e) {
runningQuestion++; // <---------------------------------------------------------
if (gamePlaying === true && runningQuestion <= questions.length - 1) {
clearAnswers();
document.querySelector('.button1').textContent = 'Next Question';
questions[runningQuestion].displayAnswers();
}
if (runningQuestion >= questions.length - 1) {
document.querySelector('.button1').textContent = 'Try again!';
runningQuestion = -1; // <-----------------------------------------------------
}
}
/* Nothing changed below */
function clearAnswers(){document.querySelectorAll(".name").forEach(e=>{e.remove()})}function resetGame(){document.querySelector(".button1").textContent="Next Question",clearAnswers(),runningQuestion=0,questions[runningQuestion].displayAnswers()}function init(){gamePlaying=!0,runningQuestion=0,questions[runningQuestion].displayAnswers()}document.querySelector(".button2").addEventListener("click",resetGame);
/* Same CSS as yours */ *{box-sizing:border-box;margin:0;padding:0}.container{display:flex;width:400px;height:auto;margin:100px auto;align-items:center;flex-direction:column}.question{margin-top:40px;color:#600;font-size:1.4rem}.answers{display:flex;flex-direction:column;margin-top:10px;height:100px;margin-bottom:15px}.name{margin-top:20px;cursor:pointer;color:#600;font-size:1.2rem}.button1{margin-top:50px;border-style:none;width:350px;height:50px;font-size:1.4rem}ul>li{list-style-type:none;margin-top:10px;font-size:1.2rem;color:#600;height:30px;cursor:pointer;display:block}.button2{margin-top:20px;border-style:none;width:350px;height:50px;font-size:1.4rem}
<!-- Same HTML as yours --> <div class="container"> <div class="question"></div><div class="answers"></div><button type="button" class="button1">Next Question</button> <button type="button" class="button2">Reset</button></div>
or another way, which I find cleaner. A problem you can run into with your current code, is that if you have other things to keep track of, like a score, for example, you might forget to reset them as well, inside your nextQuestion function. And if you add other stuff, you'll need to reset them in multiple places in your code.
What I would do is simply reuse the resetGame function to reset everything:
class Question{constructor(e,s,t){this.question=e,this.answers=s,this.correct=t}displayAnswers(){document.querySelector(".question").innerHTML=`<div class="q1">${this.question}</div>`;let e=0,s=this.answers;for(let t of s){let s=`<div class="name" id=${e}>${t}</div>`;document.querySelector(".answers").insertAdjacentHTML("beforeend",s),e++}}}const q1=new Question("What's the capitol of Rwanda?",["A: Dodoma","B: Acra","C: Kigali"],2),q2=new Question("What's is the square root of 0?",["A: Not possible","B: 0","C: 1"],1),q3=new Question("Who was Rome's first emperor?",["A: Tiberius","B: Augustus","C: Marcus Aurelius"],1),questions=[q1,q2,q3];let runningQuestion,gamePlaying;
/* Nothing changed above */
const btn1 = document.querySelector('.button1');
init();
btn1.addEventListener("click", onButtonClick);
function isLastQuestion() { return runningQuestion >= questions.length - 1; }
function onButtonClick() {
if (gamePlaying === true && !isLastQuestion()) {
runningQuestion++;
displayQuestion();
} else {
resetGame();
}
}
function displayQuestion() {
clearAnswers();
btn1.textContent = isLastQuestion() ? 'Try again' : 'Next Question';
questions[runningQuestion].displayAnswers();
}
/* Nothing changed below */
function clearAnswers(){document.querySelectorAll(".name").forEach(e=>{e.remove()})}function resetGame(){document.querySelector(".button1").textContent="Next Question",clearAnswers(),runningQuestion=0,questions[runningQuestion].displayAnswers()}function init(){gamePlaying=!0,runningQuestion=0,questions[runningQuestion].displayAnswers()}document.querySelector(".button2").addEventListener("click",resetGame);function init(){gamePlaying=true;runningQuestion = 0;questions[runningQuestion].displayAnswers()}
/* Same CSS as yours */ *{box-sizing:border-box;margin:0;padding:0}.container{display:flex;width:400px;height:auto;margin:100px auto;align-items:center;flex-direction:column}.question{margin-top:40px;color:#600;font-size:1.4rem}.answers{display:flex;flex-direction:column;margin-top:10px;height:100px;margin-bottom:15px}.name{margin-top:20px;cursor:pointer;color:#600;font-size:1.2rem}.button1{margin-top:50px;border-style:none;width:350px;height:50px;font-size:1.4rem}ul>li{list-style-type:none;margin-top:10px;font-size:1.2rem;color:#600;height:30px;cursor:pointer;display:block}.button2{margin-top:20px;border-style:none;width:350px;height:50px;font-size:1.4rem}
<!-- Same HTML as yours --> <div class="container"> <div class="question"></div><div class="answers"></div><button type="button" class="button1">Next Question</button> <button type="button" class="button2">Reset</button></div>

How to take back a page to its previous state by clicking the back button of the browser in javascript

I have a page with a link to a form. After clicking the link the form shows up and the link disappears. The problem that i have is, when i click the browser's back button, the values of the URL is changed, but the state of the page doesn't go back to previous state. The form should disappear and the link shows back. Also on reload when the form is visible, the page goes back to its first state, which i need to prevent from happening.
Code :
<html>
<style>
.titimmo {
text-align: center;
padding: 10px;
font-size: 14pt;
background-color: #CC3300;
display: block;
}
.hidden {
display: none;
}
.visible {
display: block;
}
#formContainer {
padding: 1em 0 1em 2em;
background-color: #E8E8E8;
margin: 1em 0 1em 2em;
width: 88.9%;
}
#formContainer h4 {
color: #FF3300;
}
</style>
<body>
<div id="categContainer1">
<div class="titimmo">Real Estate</div>
</div>
<div id="formContainer" class="hidden">
<form action="add.php" method="post">
<h4>Location :</h4>
<input type="text" name="made"/>
<h4>Price :</h4>
<input type="text" name="modele"/><br/><br/>
</form>
</div>
<script>
function stepone() {
document.getElementById('a_categ').onclick = function () {
document.getElementById('categContainer1').className += " hidden";
document.getElementById('formContainer').className = "visible";
window.history.pushState('Form', 'My form', this.getAttribute("href"));
return false
};
}
stepone();
</script>
</body>
</html>
First question is: How to bring back the page to its previous state by clicking the browser's back button?
Second question is: How to prevent the page from going back to its previous state - on reload when it's on second state (when form is visible)?
There are two things you need to do to make it work:
To monitor browser back button click, use
window.onpopstate
method
To remember the form state, you need to store the value in
localStorage or in a cookie.
This is a basic example:
var formVisible = localStorage.formVisible || false;
var cContainer = document.getElementById('categContainer1');
var fContainer = document.getElementById('formContainer');
function formOpen(e) {
cContainer.className = "hidden";
fContainer.className = "visible";
window.history.pushState('Form', 'My form', this.getAttribute("href"));
localStorage.formVisible = 'Y';
return false;
};
function formClose(e) {
cContainer.className = "visible";
fContainer.className = "hidden";
localStorage.removeItem( 'formVisible' );
};
if( formVisible ) formOpen();
document.getElementById('a_categ').onclick = formOpen;
window.onpopstate = formClose;
var formVisible = localStorage.formVisible || false;
var cContainer = document.getElementById('categContainer1');
var fContainer = document.getElementById('formContainer');
function formOpen(e) {
cContainer.className = "hidden";
fContainer.className = "visible";
window.history.pushState('Form', 'My form', this.getAttribute("href"));
localStorage.formVisible = 'Y';
return false;
};
function formClose(e) {
cContainer.className = "visible";
fContainer.className = "hidden";
localStorage.removeItem( 'formVisible' );
};
if( formVisible ) formOpen();
document.getElementById('a_categ').onclick = formOpen;
window.onpopstate = formClose;
.titimmo {
text-align: center;
padding: 10px;
font-size: 14pt;
background-color: #CC3300;
display: block;
}
.hidden {
display: none;
}
.visible {
display: block;
}
#formContainer {
padding: 1em 0 1em 2em;
background-color: #E8E8E8;
margin: 1em 0 1em 2em;
width: 88.9%;
}
#formContainer h4 {
color: #FF3300;
}
<div id="categContainer1">
<div class="titimmo">
Real Estate
</div>
</div>
<div id="formContainer" class="hidden">
<form action="add.php" method="post">
<h4>Location :</h4>
<input type="text" name="made" />
<h4>Price :</h4>
<input type="text" name="modele" />
</form>
</div>
Also on Fiddle, where you can actually see how it works.

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