In /vendor/magento/module-checkout/Block/Checkout/LayoutProcessor.php, I can find blow code (getBillingAddressComponent), which is used to validate the billing address input fields, and I can change the max/min input length to the value I wanted and it will work on checkout page.
I would like to do the same validation for shipping address. but I can't find the function like getShippingAddressComponent? How / Where can I edit valications for shipping address input fields?
private function getBillingAddressComponent($paymentCode, $elements)
{
return [
'component' => 'Magento_Checkout/js/view/billing-address',
'displayArea' => 'billing-address-form-' . $paymentCode,
'provider' => 'checkoutProvider',
'deps' => 'checkoutProvider',
'dataScopePrefix' => 'billingAddress' . $paymentCode,
'sortOrder' => 1,
'children' => [
'form-fields' => [
'component' => 'uiComponent',
'displayArea' => 'additional-fieldsets',
'children' => $this->merger->merge(
$elements,
'checkoutProvider',
'billingAddress' . $paymentCode,
[
'country_id' => [
'sortOrder' => 115,
],
'region' => [
'visible' => false,
],
'region_id' => [
'component' => 'Magento_Ui/js/form/element/region',
'config' => [
'template' => 'ui/form/field',
'elementTmpl' => 'ui/form/element/select',
'customEntry' => 'billingAddress' . $paymentCode . '.region',
],
'validation' => [
'required-entry' => true,
],
'filterBy' => [
'target' => '${ $.provider }:${ $.parentScope }.country_id',
'field' => 'country_id',
],
],
'postcode' => [
'component' => 'Magento_Ui/js/form/element/post-code',
'validation' => [
'required-entry' => false,
],
],
'company' => [
'validation' => [
'max_text_length' => 5,
],
],
'fax' => [
'validation' => [
'min_text_length' => 0,
],
],
'telephone' => [
'config' => [
'tooltip' => [
'description' => __('For delivery questions.'),
],
],
],
]
),
],
],
];
}
