How to pre-configure classes when inserting tags?

[JhonatanRian]

How to configure "class" attribute when inserting tags? for example, when I select blockquote, the tag will be inserted in the field with css classes created by me, so when I render the content it will be the way I want it.
I tried this way but it didn't work:

"heading": {
            "options": [
                {
                    "model": "blockquote",
                    "title": "blockquote",
                    "class": "blockquote-content p-5",
                }
            ],
        },

[goapunk]

@JhonatanRian I don't think that's possible, see ckeditor/ckeditor5#3323. You can however use css to change the appearance, e.g. with

.ck-content blockquote {
      margin-top: 5px;

}