<script type="text/javascript">
require([
'jquery',
'mage/adminhtml/events',
'mage/adminhtml/wysiwyg/tiny_mce/setup'
], function (jQuery) {
jQuery(document).ready(function () {
var editor;
editor = new wysiwygSetup(
'additional-description',{
"width":"99%",
"height":"200px",
"plugins":[{"name":"image"}],
"tinymce4":{"toolbar":"formatselect | bold italic underline | alignleft aligncenter alignright | bullist numlist | link table charmap","plugins":"advlist autolink lists link charmap media noneditable table contextmenu paste code help table",
}
});
editor.setup("exact");
jQuery('#additional-description')
.addClass('wysiwyg-editor')
.data(
'wysiwygEditor',
editor
);
});
});
<div class="field additional-description"><label class="label" for="additional-description"><span>Product
Description</span><br><span class="scope">[global]</span></label>
<div class="control _with-tooltip"><textarea id="additional-description" <?= strpos($current_url, 'view') ? ' disabled="disabled"' : '';?> class="input-text"
name="additional[description]" placeholder=""><?= $additionalAttributes['description'] ? trim($additionalAttributes['description']) : null ?></textarea>
<div class="field-tooltip toggle"><span class="field-tooltip-action action-help" tabindex="0"></span>
<div class="field-tooltip-content"><span>Product Description</span></div>
</div>
</div>
</div>