Use with the Chosen plugin.
The Favorite color option requires to choose 2-4 colors you like most.
<!-- Include chosen CSS -->
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/chosen/1.1.0/chosen.min.css" />
<!-- Include choosen JS -->
<script src="//cdnjs.cloudflare.com/ajax/libs/chosen/1.1.0/chosen.jquery.min.js"></script>
<style type="text/css">
#chosenForm .chosen-choices {
border: 1px solid #ccc;
border-radius: 4px;
min-height: 34px;
padding: 6px 12px;
}
#chosenForm .form-control-feedback {
/* To make the feedback icon visible */
z-index: 100;
}
</style>
<form id="chosenForm" method="post" class="form-horizontal">
<div class="form-group">
<label class="col-lg-3 control-label">Favorite color</label>
<div class="col-lg-5">
<select name="colors" class="form-control chosen-select"
multiple data-placeholder="Choose 2-4 colors">
<option value="black">Black</option>
<option value="blue">Blue</option>
<option value="green">Green</option>
<option value="orange">Orange</option>
<option value="red">Red</option>
<option value="yellow">Yellow</option>
<option value="white">White</option>
</select>
</div>
</div>
<div class="form-group">
<div class="col-lg-5 col-lg-offset-3">
<button type="submit" class="btn btn-default">Validate</button>
</div>
</div>
</form>
$(document).ready(function() {
$('#chosenForm')
.find('[name="colors"]')
.chosen()
// Revalidate the color when it is changed
.change(function(e) {
$('#chosenForm').bootstrapValidator('revalidateField', 'colors');
})
.end()
.bootstrapValidator({
excluded: ':disabled',
feedbackIcons: {
valid: 'glyphicon glyphicon-ok',
invalid: 'glyphicon glyphicon-remove',
validating: 'glyphicon glyphicon-refresh'
},
fields: {
colors: {
validators: {
callback: {
message: 'Please choose 2-4 color you like most',
callback: function(value, validator) {
// Get the selected options
var options = validator.getFieldElements('colors').val();
return (options != null && options.length >= 2 && options.length <= 4);
}
}
}
}
}
});
});