CKEditor 5 for Strapi

Integrates CKEditor 5 into your Strapi project as a fully customizable custom field. (Unofficial integration)

👋 Get Started

• Features
• Installation
• Configuration
• Contributing
• Requirements

✨ Features

• Media library integration
• Supports responsive images
• Supports Strapi's theme switching with the ability to set a custom theme
• Supports i18n and different UI translations
• Few predefined editor configs with the ability to add custom ones
• Possible to add new plugins

🔧 Installation

• Inside your Strapi app, add the package:

npm install @_sh/strapi-plugin-ckeditor

or

yarn add @_sh/strapi-plugin-ckeditor

• Then run build:

npm run build

or

yarn build

⚙️ Configuration

The plugin uses Strapi custom fields API and CKEditor dll build

The plugin configuration should be defined in the /config/ckeditor.txt file.

It's highly recommended to explore the official ckeditor documentation

Content of ckeditor.txt will be passed into the script tag during the initialization process.

📂 Default configs: admin/src/components/Input/CKEditor/configs

📂 Default theme: admin/src/components/Input/CKEditor/theme

ckeditor.txt example:

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globalThis.CKEditorConfig = {

    /* By default custom configs and theme
    defined in this file are going to be spread into
    default configs and theme these two properties below
    allow you to redefine default objects completely: */

    //configsOverwrite:true,
    //themeOverwrite:true,

    /* Here you can redefine default configs
    or add completely new ones.
    Each config includes: 
    "styles", "field" and "editorConfig" properties.
    Property "field" is required. */

    configs:{
        toolbar:{
            // styles:``,
            // field:{},
            // editorConfig:{}
        },
        custom:{
            
            /* Styles for this specific editor version.
            This will be passed into the editor's parent container. */

            styles:`
            //     --ck-focus-ring:3px dashed #5CB176;

            //     .ck.ck-content.ck-editor__editable {
            //       &.ck-focused:not(.ck-editor__nested-editable) {
            //         border: var(--ck-focus-ring) !important;
            //       }
            //     }
            //     .ck.ck-content.ck-editor__editable.ck-rounded-corners.ck-editor__editable_inline.ck-blurred{
            //       min-height: 400px;
            //       max-height: 400px;
            //     }
            //     .ck.ck-content.ck-editor__editable.ck-rounded-corners.ck-editor__editable_inline.ck-focused{
            //       min-height: 400px;
            //       max-height: 1700px;
            //     }
            `,

            /* Custom field option */
            field: {
                key: "custom",
                value: "custom",
                metadatas: {
                  intlLabel: {
                    id: "ckeditor5.preset.custom.label",
                    defaultMessage: "Custom version",
                  },
                },
            },
            /* CKEditor configuration */
            editorConfig:{
                /* You can find all available built-in plugins
                in the admin/src/components/Input/CKEditor/configs/base.js */
                plugins: [
                    CKEditor5.autoformat.Autoformat,
                    CKEditor5.basicStyles.Bold,
                    CKEditor5.basicStyles.Italic,
                    CKEditor5.essentials.Essentials,
                    CKEditor5.heading.Heading,
                    CKEditor5.image.Image,
                    CKEditor5.image.ImageCaption,
                    CKEditor5.image.ImageStyle,
                    CKEditor5.image.ImageToolbar,
                    CKEditor5.image.ImageUpload,
                    CKEditor5.indent.Indent,
                    CKEditor5.link.Link,
                    CKEditor5.list.List,
                    CKEditor5.paragraph.Paragraph,
                    CKEditor5.pasteFromOffice.PasteFromOffice,
                    CKEditor5.table.Table,
                    CKEditor5.table.TableToolbar,
                    CKEditor5.table.TableColumnResize,
                    CKEditor5.table.TableCaption,
                    CKEditor5.strapiPlugins.StrapiMediaLib,
                    CKEditor5.strapiPlugins.StrapiUploadAdapter,
                  ],

                  /* By default, the language of the plugin's UI will be chosen
                  based on the language defined in this config file
                  or on the preferred language from the strapi's user config
                  and if both of them are not set then 'en' will be used as a fallback.
                  ( language.ui -> preferred language -> 'en' ) */

                  /* For content it will chose the language based on i18n (if! ignorei18n)
                  or on language.content property defined here
                  and it will use UI language as a fallback.
                  ignorei18n ? language.content : i18n; -> language.ui */

                  language:{
                    // ignorei18n: true,
                    // ui:'he',
                    // content:'he'
                  },
                  toolbar: [
                    'heading',
                    '|',
                    'bold', 'italic', 'link', 'bulletedList', 'numberedList',
                    '|',
                    'strapiMediaLib', 'insertTable',
                    '|',
                    'undo', 'redo'
                  ],
                  heading: {
                    options: [
                      { model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },
                      { model: 'heading1', view: 'h1', title: 'Heading 1', class: 'ck-heading_heading1' },
                      { model: 'heading2', view: 'h2', title: 'Heading 2', class: 'ck-heading_heading2' },
                      { model: 'heading3', view: 'h3', title: 'Heading 3', class: 'ck-heading_heading3' },
                      { model: 'heading4', view: 'h4', title: 'Heading 4', class: 'ck-heading_heading4' },
                    ]
                  },
                  image: {
                    toolbar: [
                      'imageStyle:inline',
                      'imageStyle:block',
                      'imageStyle:side',
                      '|',
                      'toggleImageCaption',
                      'imageTextAlternative'
                    ]
                  },
                  table: {
                    contentToolbar: [
                      'tableColumn',
                      'tableRow',
                      'mergeTableCells',
                      '|',
                      'toggleTableCaption'
                    ]
                  }
            }
        }
    },

    /* Here you can customize the plugin's theme.
    This will be passed as "createGlobalStyle". */
    theme:{
        // common:``,
        // light:``,
        // dark:``,
        // additional:``
    }

}

If you use the default (local) upload provider you should specify the url property in the config/server.js in order to get the full URL on uploaded files eg:

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module.exports = ({ env }) => ({
  url: env("PUBLIC_URL", "http://localhost:1337"),
  host: env('HOST', '0.0.0.0'),
  port: env.int('PORT', 1337),
  app: {
    keys: env.array('APP_KEYS'),
  },
});

In order to display a content from an external source in your admin you should configure your middlewares.js check the docs about this

How to add plugins

Markdown plugin example

• Inside your app:

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yarn add @ckeditor/ckeditor5-markdown-gfm

or

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npm install @ckeditor/ckeditor5-markdown-gfm

• your-app/src/admin/app.js

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import ckeditor5Dll from "ckeditor5/build/ckeditor5-dll.js";
import ckeditor5MrkdownDll from "@ckeditor/ckeditor5-markdown-gfm/build/markdown-gfm.js";


const config = {};

const bootstrap = (app) => {};

export default {
  config,
  bootstrap,
};

• your-app/config/ckeditor.txt

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globalThis.CKEditorConfig = {
    configs:{
        markdown:{
            field: {
                key: "markdown",
                value: "markdown",
                metadatas: {
                  intlLabel: {
                    id: "ckeditor.preset.markdown.label",
                    defaultMessage: "Markdown version",
                  },
                },
            },
            editorConfig:{
                placeholder: 'Markdown editor',
                plugins: [
                    CKEditor5.essentials.Essentials,
                    CKEditor5.autoformat.Autoformat,
                    CKEditor5.blockQuote.BlockQuote,
                    CKEditor5.basicStyles.Bold,
                    CKEditor5.heading.Heading,
                    CKEditor5.image.Image,
                    CKEditor5.image.ImageCaption,
                    CKEditor5.image.ImageStyle,
                    CKEditor5.image.ImageToolbar,
                    CKEditor5.image.ImageUpload, 
                    CKEditor5.indent.Indent,
                    CKEditor5.basicStyles.Italic,
                    CKEditor5.link.Link,
                    CKEditor5.list.List,
                    CKEditor5.mediaEmbed.MediaEmbed,
                    CKEditor5.paragraph.Paragraph,
                    CKEditor5.table.Table,
                    CKEditor5.table.TableToolbar,
                    CKEditor5.sourceEditing.SourceEditing, 
                    CKEditor5.strapiPlugins.StrapiMediaLib,
                    CKEditor5.strapiPlugins.StrapiUploadAdapter,
                    CKEditor5.markdownGfm.Markdown,
                    CKEditor5.basicStyles.Code, 
                    CKEditor5.codeBlock.CodeBlock,
                    CKEditor5.list.TodoList,
                    CKEditor5.basicStyles.Strikethrough,
                    CKEditor5.horizontalLine.HorizontalLine
                ],
                toolbar: {
                    items: [
                        'heading',
                        '|',
                        'bold',
                        'italic',
                        'strikethrough',
                        'link',
                        '|',
                        'bulletedList',
                        'numberedList',
                        'todoList',
                        '|',
                        'code',
                        'codeBlock',
                        '|',
                        'uploadImage',
                        'strapiMediaLib',
                        'blockQuote',
                        'horizontalLine',
                        '-',
                        'sourceEditing',
                        '|',
                        'outdent',
                        'indent',
                        '|',
                        'undo',
                        'redo'
                    ],
                    shouldNotGroupWhenFull: true
                },
                image: {
                    toolbar: [ 'imageStyle:inline', 'imageStyle:block', 'imageStyle:side', '|', 'toggleImageCaption', 'imageTextAlternative' ]
                },
                codeBlock: {
                    languages: [
                        { language: 'css', label: 'CSS' },
                        { language: 'html', label: 'HTML' },
                        { language: 'javascript', label: 'JavaScript' },
                        { language: 'php', label: 'PHP' }
                    ]
                },
            }
        }
    }
}

• Then rebuild your app:

npm run build

or

yarn build

🛠 Contributing

This section covers the way how to configure your environment if you want to contribute to this package.

Setting up the environment

In order to start making changes in the plugin you first need to install Strapi infrastructure on top of the plugin repository.

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npx create-strapi-app --quickstart strapi
cd strapi

By default Strapi does not create plugins folder so we need to create it.

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mkdir -p src/plugins

Now we should clone this repository so we can work on it.

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git clone git@github.com:nshenderov/strapi-plugin-ckeditor.git src/plugins/strapi-plugin-ckeditor

Let's add an entry inside ./package.json file so, we won't need to use yarn inside plugin itself.

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"workspaces": ["./src/plugins/strapi-plugin-ckeditor"]

Install dependencies:

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yarn install

Now we need to register plugin so strapi can use it. In order to do that we need to create (if not already created) ./config/plugins.js file and add entry to it.

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module.exports = ({ env }) => ({
  ckeditor5: {
    enabled: true,
    resolve: "./src/plugins/strapi-plugin-ckeditor"
  },
});

Rebuild the project and start the server:

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yarn build
yarn develop

⚠️ Requirements

Strapi v4.13.0+

Node >=18.0.0 <=20.x.x