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I would like to find a way to remove the disabled attribute from webform fields inside a custom Handler.

The disabled attribute is currently being applied to webform elements during user input via conditions/states with the UI and I would like to remove this attribute after clicking submit so that these webform fields will submit their values.

I've been looking through the available functions from the WebformhandlerBase: https://git.uwaterloo.ca/drupal-org/webform/blob/8.x-5.9/src/Plugin/WebformHandlerBase.php, but can't find where this attribute exists, and don't see an approach to alter/remove it.

public function validateForm() {} seems like a good moment in time to alter, but I can't find this attribute.

Noting I have success doing this with jQuery but would prefer doing this in my custom Handler

How do you remove a form field attribute (disabled) with a custom Handler after a user clicks submit?

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  • And you are definitely not looking for the Clear value(s) when hidden checkbox every element has under its "Conditions" tab and uncheck that, or are you?
    – leymannx
    Apr 12, 2020 at 22:23
  • Hey @leymannx, I don’t think so. I need the field values, but as the field is both required, and disabled as a user fills in the form, I need to remove the disabled attribute so form submit completes
    – Prestosaurus
    Apr 12, 2020 at 22:26

2 Answers 2

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Once you submit a form, you are not able to retrieve disabled inputs (https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-the-form-data-set). That said:

  • You cannot modify input's attributes from server-side since the submission data is already posted.
  • Developing your solution with jQuery on .submit() function is a good idea (far away from bad practices).
  • You can also make another work around: instead of disabling you could use readonly="readonly" attribute (https://www.w3.org/TR/REC-html40-971218/interact/forms.html#h-17.12.2)
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  • Is that true for the validateForm() function? I see that with the field both required and disabled, the form does not submit and is set with an error message.
    – Prestosaurus
    Apr 16, 2020 at 20:24
  • validateForm() makes use of the submitted values. Because you have disabled a field and is not present in the submitted values, that means will not be present in the validateForm() either. If your form is showing an error, check webform_hooks validations along with the webform UI in case you have implementation other validations.
    – user98716
    Apr 18, 2020 at 11:38
  • @Prestosaurus did you find an answer on how to identify and remove disabled fields in the handler, if so could you please share it. thanks
    – amit
    Jan 24 at 0:18
  • Hi @amit, I did not and had to take a different approach
    – Prestosaurus
    Jan 27 at 4:00
  • @Prestosaurus we have found a workaround, its a bit tedious but works as a proof of concept. I posted it as answer, hopefully the moderator would reinstate my deleted post.
    – amit
    Jan 31 at 7:35
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Here is a workaround that seems to work, for example

  1. Create a number element with key as num_a 2.Create a hidden checkbox element with its key as num_a_ignore
  2. Add a condition to num_a element in #1 to turn on the checkbox when value or num_a is say greater than 10
  3. Write a custom handler which probes for *_ignore keys and matches them with any element keys. When a match is found and the value of *_ignore key is true that element is disabled and processed accordingly.
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