How TO - Form with Multiple Steps
Learn how to create a form with multiple steps.
Form Wizard - Multi Step Form:
Step 1) Add HTML:
Example
<form id="regForm" action="">
<h1>Register:</h1>
<!-- One "tab"
for each step in the form: -->
<div class="tab">Name:
<p><input
placeholder="First name..." oninput="this.className = ''"></p>
<p><input placeholder="Last name..." oninput="this.className = ''"></p>
</div>
<div class="tab">Contact Info:
<p><input
placeholder="E-mail..." oninput="this.className = ''"></p>
<p><input
placeholder="Phone..." oninput="this.className = ''"></p>
</div>
<div class="tab">Birthday:
<p><input placeholder="dd" oninput="this.className
= ''"></p>
<p><input placeholder="mm" oninput="this.className =
''"></p>
<p><input placeholder="yyyy" oninput="this.className =
''"></p>
</div>
<div class="tab">Login Info:
<p><input
placeholder="Username..." oninput="this.className = ''"></p>
<p><input placeholder="Password..." oninput="this.className = ''"></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>
Step 2) Add CSS:
Style the form elements:
Example
/* Style the form */
#regForm {
background-color: #ffffff;
margin: 100px auto;
padding: 40px;
width:
70%;
min-width: 300px;
}
/* Style the input fields */
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;
}
/* 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;
}
/* Mark the active step: */
.step.active {
opacity: 1;
}
/* Mark the steps that are finished and valid: */
.step.finish {
background-color: #4CAF50;
}
Step 3) Add JavaScript:
Example
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 displays 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 to the
current step:
x[n].className += " active";
}
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