How do I add ajax callback to a form element which is created in a foreach loop

Please see the following code:

foreach ($formaddresses as $key => $val) {
  // Add edit buttons to custom client-side created addresses.
  if (!isset($val['accountnumber'])) {
    $form['orderinfo']['billshipaddresses']['billingaddresses'][$key]['#description'] = '<a class="edit-stored-address edit-stored-address-target-' . $key . '">Edit</a>';
    $form['orderinfo']['billshipaddresses']['shippingaddresses'][$key]['#description'] = '<a class="edit-stored-address edit-stored-address-target-' . $key . '">Edit</a>';
  }
}

Here this loop is creating some anchors in my form.
I just need to attach/add ‘#ajax’ callback to it.
How can I achieve this?

Something like the following code:

$form['orderinfo']['billshipaddresses']['shippingaddresses'] = [
  '#type' => 'radios',
  '#title' => 'Shipping Address',
  '#options' => $formaddressesOptions,
  '#default_value' => '',
  '#ajax' => [
    'callback' => '::buildShipBillAddresses',
    'wrapper' => 'shippingaddresses',
    'event' => 'change'
  ],
];

Here we can see if the above radio is change then an ajax callback will work and will call this method buildShipBillAddresses
Thanks!

This article was republished from its original source.
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How do I add ajax callback to a form element which is created in a foreach loop

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