Here is an example with jQuery dependent script.
<div>
<label for="name">Name:</label>
<input id="name" type="text" required>
</div>
<div>
<label for="comments">Comments:</label>
<textarea id="comments" required></textarea>
</div>
<div class="buttons">
<button>Submit</button>
</div>
</form>
<script>
var createAllErrors = function() {
var form = $( this ),
errorList = $( "ul.errorMessages", form );
var showAllErrorMessages = function() {
errorList.empty();
// Find all invalid fields within the form.
var invalidFields = form.find( ":invalid" ).each( function( index, node ) {
// Find the field's corresponding label
var label = $( "label[for=" + node.id + "] "),
// Opera incorrectly does not fill the validationMessage property.
message = node.validationMessage || 'Invalid value.';
errorList
.show()
.append( "<li><span>" + label.html() + "</span> " + message + "</li>" );
});
};
// Support Safari
form.on( "submit", function( event ) {
if ( this.checkValidity && !this.checkValidity() ) {
$( this ).find( ":invalid" ).first().focus();
event.preventDefault();
}
});
$( "input[type=submit], button:not([type=button])", form )
.on( "click", showAllErrorMessages);
$( "input", form ).on( "keypress", function( event ) {
var type = $( this ).attr( "type" );
if ( /date|email|month|number|search|tel|text|time|url|week/.test ( type )
&& event.keyCode == 13 ) {
showAllErrorMessages();
}
});
};
$( "form" ).each( createAllErrors );
</script>