provide filter condition in autocomplet field in drupal form using property

To provide a filter condition in an autocomplete field in Drupal form using the property, you can use the #autocomplete_path property in the form element. This property specifies the path to the autocomplete callback function that will handle the autocomplete suggestions.

Here's an example of how you can add a filter condition to an autocomplete field in a Drupal form using the #autocomplete_path property:

$form['my_autocomplete_field'] = [
  '#type' => 'textfield',
  '#title' => 'Autocomplete Field',
  '#autocomplete_path' => 'my_module/autocomplete_callback',
  '#attributes' => [
    'data-autocomplete-filter' => 'my_filter_value',
  ],
];

In the above example, my_autocomplete_field is the name of the autocomplete field. The #autocomplete_path property is set to my_module/autocomplete_callback, which is the path to the autocomplete callback function that will handle the autocomplete suggestions.

To add a filter condition, you can use the #attributes property and set a custom data attribute. In the example above, data-autocomplete-filter is set to my_filter_value. You can replace my_filter_value with the actual filter condition you want to use.

By implementing the autocomplete callback function at the specified path (my_module/autocomplete_callback in the example), you can then apply the filter condition based on the provided value and return the appropriate autocomplete suggestions.

This allows you to filter the autocomplete suggestions based on the specified condition in the Drupal form.