Custom heading config not loading after 4.10 update

[TheFunkyMonk]

Description

After updating from CKeditor 4.9.0, all our custom heading block options are gone. Config below.

Steps to reproduce

1. Create a CKeditor field with the below config and all default headings disabled
2. Open heading dropdown

Additional info

• Craft version: 5.8.15
• PHP version: 8.3.21
• Database driver & version: MySQL 8.0.40
• Plugins & versions:

CKEditor 	4.10.1
Colour Swatches 	5.1.0
Control Panel CSS 	3.0.0
Element Relations 	3.1.3
Field Manager 	4.0.3
ImageOptimize 	5.0.7
Redirects 	5.0.12
Retcon 	3.2.1
SEO 	5.1.17
Servd Assets and Helpers 	4.1.2
Vite 	5.0.1

Config

{
  "heading": {
    "options": [
      {
        "class": "ck-subhead",
        "model": "heading6",
        "title": "Subhead",
        "view": "h6"
      },
      {
        "class": "ck-heading",
        "model": "heading1",
        "title": "Heading",
        "view": "h2"
      },
      {
        "class": "ck-paragraph",
        "model": "paragraph",
        "title": "Paragraph",
        "view": "p"
      }
    ]
  },
  "link": {
    "decorators": {
      "openInNewTab": {
        "attributes": {
          "rel": "noopener noreferrer",
          "target": "_blank"
        },
        "label": "Open in a new tab",
        "mode": "manual"
      }
    }
  },
  "list": {
    "properties": {
      "reversed": false,
      "startIndex": false,
      "styles": false
    }
  },
  "style": {
    "definitions": [
      {
        "classes": [
          "ck-paragraph-large"
        ],
        "element": "p",
        "name": "Large paragraph"
      }
    ]
  }
}

[linear]

PT-2883 Custom heading config not loading after 4.10 update

[i-just]

Hi, thanks for getting in touch. What “Heading Levels” do you have selected in the CKEditor Config that uses the JSON you posted?

[ch-turnstyle]

I'm also having this issue when upgrading to 3.14.1. Here's what I'm seeing:

1. If there are no Heading Levels checkboxes checked, then no headings appear at all in the field's dropdown. (We've got a lot of projects that do not have those checkboxes checked, so this feels like a breaking change?)
2. If I go into the config and check the Heading Levels checkboxes for the headers I've customized, the Headers will appear in the field's dropdown, however not with the custom title, nor the custom classes that I've assigned (on both the button in the field's dropdown, as well as the HTML).

Here's a sample config:

{
  "heading": {
    "options": [
      {
        "class": "ck-heading_heading1 dropdown-heading-one",
        "model": "heading1",
        "title": "Heading One",
        "view": {
          "classes": [
            "rich-heading-one"
          ],
          "name": "h1"
        }
      },
    ]
  },
}

Expected dropdown:

Actual dropdown and resulting HTML:

[i-just]

Thanks for the extra info @ch-turnstyle! I raised a PR for this.

[sandrodunkel]

Still not working in 4.10.1 – any plans on when the fix is being rolled out?

[anita-chouhan]

Hi, any updates on this issue?

[TheFunkyMonk]

Hope this gets bumped, there’s an open PR and we’re avoiding updating ckeditor on all our sites because of this.

[brandonkelly]

CKEditor 3.15.0 and 4.11.0 are out with a fix for this. Thanks again!