Snippets > jQuery > Validate checkboxes

Preview

HTML

<section class="demo-section"> 
<form action="" method="POST" id="demoForm">
<div class="container demo-container">
<div class="demo-image"></div>
<div class="row justify-content-between">
<div class="col-md-3 col-checkbox">
<input type="checkbox" name="demo-checkboxes" id="checkbox-01">
<label for="checkbox-01">Sunglasses</label>
</div>
<div class="col-md-3 col-checkbox">
<input type="checkbox" name="demo-checkboxes" id="checkbox-02">
<label for="checkbox-02">Pencils</label>
</div>
<div class="col-md-3 col-checkbox">
<input type="checkbox" name="demo-checkboxes" id="checkbox-03">
<label for="checkbox-03">Shoes</label>
</div>
<div class="col-md-3 col-checkbox">
<input type="checkbox" name="demo-checkboxes" id="checkbox-04">
<label for="checkbox-04">Notepad</label>
</div>
</div>
</div>
<div id="submit-message"></div>
<div class="text-center submit-button-container">
<input class="btn btn-primary submit-button" type="submit" name="submit" id="submit" value="Submit">
</div>
</form> 
</section>

CSS

.demo-section {
margin: 0 auto;
max-width: 640px;
}

.demo-container {
padding: 2em;
background-image: linear-gradient(to top, #ececec 0%, #ffffff 100%);
box-shadow: rgba(0, 0, 0, 0.24) 0px 3px 8px;
}

.demo-image {
width: 100%;
height: 420px;
background-image: url("image.jpg");
background-repeat: no-repeat;
background-size: cover;
background-position: center;
background-size: cover;
margin-bottom: 1em;
}

/* checkboxes */
.col-checkbox input {
display: none;
}
.col-checkbox label {
display: block;
position: relative;
padding: 10px 0 4px 40px;
border-bottom: 1px dashed rgba(0, 0, 0, 0.30);
color: rgba(0, 0, 0, 0.30);
cursor: pointer;
text-align: right;
}
.col-checkbox label::before {
content: '';
display: block;
position: absolute;
top: 10px;
left: 0;
width: 24px;
height: 24px;
border: 1px solid rgba(0, 0, 0, 0.30);
}
.col-checkbox label:hover, input:focus + label {
border-bottom: 1px dashed rgb(0, 0, 0, 1.00);
color: rgba(0, 0, 0, 1.00);
}

.col-checkbox label::before:hover {
border: 1px solid rgba(0, 0, 0, 0.60);
color: rgba(0, 0, 0, 1.00);
}
.col-checkbox label:hover::before {
border: 2px solid rgba(0, 0, 0, 0.60);
} 

.col-checkbox input:checked + label {
border-bottom: 1px dashed rgb(0, 0, 0, 1.00);
color: rgba(0, 0, 0, 0.90);
}
.col-checkbox input:checked + label::before {
position: absolute; 
font-family: 'FontAwesome';
font-size: 16px;
content: '\f00d'; 
border: 1px solid rgba(0, 0, 0, 0.60);
color: rgba(0, 0, 255, 0.90);
font-weight: bold; 
text-align: center !important;
}
.input-error {
position: relative;
text-align: center;
padding: 4px 20px 0 20px;
color: rgba(154, 0, 0, 0.60);
}

.input-error::after {
position: absolute;
font-family: 'FontAwesome';
font-size: 20px;
content: "\f25a";
top: 5px;
right: 0;
}

.input-error::before {
position: absolute;
font-family: 'FontAwesome';
font-size: 20px;
content: "\f25a";
top: 5px;
left: 0;
-moz-transform: scale(-1, 1);
-webkit-transform: scale(-1, 1);
-o-transform: scale(-1, 1);
-ms-transform: scale(-1, 1);
transform: scale(-1, 1);
}
.submit-button-container {
margin-top: 1em;
}

.submit-button {
width: 100%;
}

#submit-message {
margin-top: 10px;
}

.input-submitted {
text-align: center;
color: rgba(0, 102, 49, 0.60)
}

$(function() {
$('#submit').click(function() {
if ($('input[name="demo-checkboxes"]:checked').length == 0) {
$("#submit-message").html('<div class="input-error">Please check at least one item</div>');
$("#submit").addClass("btn-warning");
return false;
} else {
$("#submit-message").html('<div class="input-submitted">Thank you <i class="fa-solid fa-thumbs-up"></i> </div>');
$("#submit").removeClass("btn-warning");
return false;
}
});
});