Custom textarea button not showing

[bothworlds]

I was browsing the forum today and found a similar issue, where the Kirby sanitizer needs to be prepared for the custom button.

Maybe it helps someone here:

Custom writer marks in Kirby 4

The docs should probably mention this. But “unknown” (to Kirby) tags are filtered out by the sanitizer. You can allow tags in your plugin’s index.php <?php Kirby\Sane\Html::$allowedTags['mark'] = true; Kirby::plugin('mark/eg', [ // ... ]);