hook_form_alter makes js on every other form not work

May

8/22/23, 2:37 PM

I use hook_form_alter() to alter a field.

function mymodule_form_alter(&$form, &$form_state) {
  if ($form['#id'] == 'my_form') {
    $form['my_field']['#value'] = 'New value';
  }
}

It changes the field value to new value, but the problem is that, as soon as I enable this module, the JavaScript on forms stops working. For example drop-downs, autocomplete, AJAX no longer works.

I cant understand what cause this.

0 + 0

forms

hooks

Patrick Kenny

8/22/23, 4:42 PM

Try changing the theme temporarily (to any of the themes included with core that you are not already using) and see if the error still occurs.

Jaypan

8/22/23, 11:56 PM

You are misdiagnosing your problem, as this code would not cause the issue you are facing.

No Sssweat

8/23/23, 1:39 AM

Check the browser's console for JS errors.

apaderno

8/24/23, 8:41 AM

@Jaypan is correct: That code could not cause issues with JavaScript code. You don't get the form ID from `$form['#id']`, but that is another matter.

apaderno

8/24/23, 8:42 AM

Also, before setting `$form['my_field']['#value']`, you should check `$form['my_field']` has been set.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: hook_form_alter makes js on every other form not work

TH: hook_form_alter ทำให้ js ในทุก ๆ แบบฟอร์มไม่ทำงาน

RO: hook_form_alter face ca js pe orice altă formă să nu funcționeze

RU: hook_form_alter заставляет js на любой другой форме не работать

VI: hook_form_alter làm cho js trên mọi biểu mẫu khác không hoạt động

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