Enable update checkout on change for specific checkout fields in WooCommerce

Question

I'm currently working on a custom shipping method plugin for WooCommerce. In order to calculate the cost of shipping I need access to the customer's phone number and/or email address.

At the moment I can see the checkout shipping methods are refreshed for specific checkout fields as postcode, city, state or country when changing or entering a value in the checkout page.

How can I trigger this same reload when the user enters their email or phone number?

LoicTheAztec LoicTheAztec · Accepted Answer · 2018-10-09T15:07:47

That is very simeple as you will see… It can be done just adding 'update_totals_on_change' to billing email and phone fields wrapper class, this way:

add_filter( 'woocommerce_checkout_fields' , 'trigger_update_checkout_on_change' );
function trigger_update_checkout_on_change( $fields ) {

    $fields['billing']['billing_phone']['class'][] = 'update_totals_on_change';
    $fields['billing']['billing_email']['class'][] = 'update_totals_on_change';

    return $fields;
}

Code goes in functions.php file of your active child theme (or active theme). Tested and works.

But sometimes depending on your code, it will be not enough.

Enable update checkout on change for specific checkout fields in WooCommerce

1 Answers