alternative text in ckeditor

you can apply this patch if you don't want to add alt text to an iamge in ckeditor.

I think you can apply this patch and it will fix your issue.

Actually the right way would be a form alter implementation.

#6, you can also use below custom code to override the attributes of editor.

Make a custom module and write below code in .module file .

<?php
function form_overwrite_form_alter(&$form, &$form_state, $form_id) {
if ($form_id == 'editor_image_dialog' ) {
$form['attributes']['alt']['#required'] = FALSE;
}
}

Eh…

The solution is right there ;) Enter "".

Also, blind users will curse you.

Wim, good point on the helpful error text! I did not know it says that.

function yourcustom_module_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
	if(isset($form) && $form_id == "editor_image_dialog") {
    	$form['attributes']['alt']['#required'] = FALSE; 
    }
}

What I'm more concerned about is not cursed by blind people, but a group of content editors writes variants of useless stuff in the "Alternative Text" field. We often run into situations when we have to put a lot of content on our website in a short amount of time and get a lot of content editors involved to do this together. Many of them write paired quotes “” instead of "" because we are working in zh-hans and probably their input methods did that, and some of them write random stuff like 1, aaa, 123. It makes me feels bad when looking through our database that I want to shut it down immediately.
I know Drupal is a platform where accessibility is a thing but in many cases people don't want to spend time on a field that is invisible if they're in a rush, and emphasize the importance of accessibility by technically making this field "required" is probably not a good thing.