There are 3 different ways to use form validation in magento 2
To enable javascript validation use following code in your template
<form class="form" id="custom-form" method="post" autocomplete="off">
<fieldset class="fieldset">
<legend class="legend"><span><?php echo __('Personal Information') ?></span></legend><br>
<div class="field required">
<label for="email_address" class="label"><span><?php echo __('Email') ?></span></label>
<div class="control">
<input type="email" name="email" id="email_address" value="" title="<?php echo __('Email') ?>" class="input-text" data-validate="{required:true, 'validate-email':true}">
</div>
</div>
</fieldset>
<div class="actions-toolbar">
<div class="primary">
<button type="submit" class="action submit primary" title="<?php echo __('Submit') ?>"><span><?php echo __('Submit') ?></span></button>
</div>
</div>
</form>
1
<script type="text/x-magento-init">
{
"#custom-form": {
"validation": {}
}
}
</script>
2
<form data-mage-init='{"validation": {}}' class="form" id="custom-form" method="post" autocomplete="off">
3
<script type="text/javascript">
require([
'jquery',
'mage/mage'
], function($){
var dataForm = $('#custom-form');
dataForm.mage('validation', {});
});
</script>
*custom-form is form id you can replace it with your form id
List of form validation rules
To wrap up this article, a list of validation rule names is provided here as a quick reference toward the official documentation:
Magento rules:
validate-no-html-tags
validate-select
validate-no-empty
validate-alphanum-with-spaces
validate-data
validate-street
validate-phoneStrict
validate-phoneLax
validate-fax
validate-email
validate-emailSender
validate-password
validate-admin-password
validate-customer-password
validate-url
validate-clean-url
validate-xml-identifier
validate-ssn
validate-zip-us
validate-date-au
validate-currency-dollar
validate-not-negative-number
validate-zero-or-greater
validate-greater-than-zero
validate-css-length
validate-number
required-number
validate-number-range
validate-digits
validate-digits-range
validate-range
validate-alpha
validate-code
validate-alphanum
validate-date
validate-date-range
validate-cpassword
validate-identifier
validate-zip-international
validate-one-required
validate-state
required-file
validate-ajax-error
validate-optional-datetime
validate-required-datetime
validate-one-required-by-name
less-than-equals-to
greater-than-equals-to
validate-emails
validate-cc-type-select
validate-cc-number
validate-cc-type
validate-cc-exp
validate-cc-cvn
validate-cc-ukss
validate-length
required-entry
not-negative-amount
validate-per-page-value-list
validate-per-page-value
validate-new-password
required-if-not-specified
required-if-all-sku-empty-and-file-not-loaded
required-if-specified
required-number-if-specified
datetime-validation
required-text-swatch-entry
required-visual-swatch-entry
required-dropdown-attribute-entry
Validate-item-quantity
validate-grouped-qty
validate-one-checkbox-required-by-name
validate-date-between
validate-dob
max-words
min-words
range-words
letters-with-basic-punc
alphanumeric
letters-only
no-whitespace
zip-range
integer
vinUS
dateITA
dateNL
time
time12h
phoneUS
phoneUK
mobileUK
stripped-min-length
email2
url2
credit-card-types
ipv4
ipv6
pattern
allow-container-className
jQuery rules:
required,
remote,
email,
url,
date,
dateISO,
number,
digits,
creditcard,
equalTo,
maxlength,
minlength,
rangelength,
range,
max,
min
refer http://inchoo.net/magento-2/validate-custom-form-in-magento-2/
Best Answer
Read More: https://mageprince.com/blog/how-to-validate-forms-in-magento-2/
You can use
validate-digitsfor validating numberHere is the list of validation which you can use in UI form