在vue中使用了ckeditor5后，收到如下图的反馈：

起初以为是小问题，像其他富文本一样加几个属性参数就有了，但是我发现我错了，错的离谱。那些参数加上去没有任何效果，后来查找下才知道是要下载插件。

以下分为两部分，第一部分为引入并使用插件，第二部分为CKEditor -duplicate -modules报错的解决方案，根据自身情况查看。

下载插件并引用

因为我引入的方式是在vue页面中加入该代码引用

import ClassicEditor from '@givebest/ckeditor5-custom-build'

1. 在node_modules找到该文件夹 —— @givebest/ckeditor5-custom-build，并进入
2. 安装所需要的富文本插件，此处以下划线按钮为例：

npm i   // 安装其他依赖
npm i @ckeditor/ckeditor5-basic-styles // 安装下划线等工具依赖

3. 修改文件 node_modules@givebest\ckeditor5-custom-build\src\ckeditor.js，引入安装的插件

/**
 * @license Copyright (c) 2014-2021, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */
import ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor.js';
import Autoformat from '@ckeditor/ckeditor5-autoformat/src/autoformat.js';
import BlockQuote from '@ckeditor/ckeditor5-block-quote/src/blockquote.js';
import Bold from '@ckeditor/ckeditor5-basic-styles/src/bold.js';
import Essentials from '@ckeditor/ckeditor5-essentials/src/essentials.js';
import Heading from '@ckeditor/ckeditor5-heading/src/heading.js';
import Image from '@ckeditor/ckeditor5-image/src/image.js';
import ImageCaption from '@ckeditor/ckeditor5-image/src/imagecaption.js';
import ImageInsert from '@ckeditor/ckeditor5-image/src/imageinsert.js';
import ImageResize from '@ckeditor/ckeditor5-image/src/imageresize.js';
import ImageStyle from '@ckeditor/ckeditor5-image/src/imagestyle.js';
import ImageToolbar from '@ckeditor/ckeditor5-image/src/imagetoolbar.js';
import ImageUpload from '@ckeditor/ckeditor5-image/src/imageupload.js';
import Indent from '@ckeditor/ckeditor5-indent/src/indent.js';
import Italic from '@ckeditor/ckeditor5-basic-styles/src/italic.js';
import Link from '@ckeditor/ckeditor5-link/src/link.js';
import List from '@ckeditor/ckeditor5-list/src/list.js';
import MediaEmbed from '@ckeditor/ckeditor5-media-embed/src/mediaembed.js';
import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph.js';
import PasteFromOffice from '@ckeditor/ckeditor5-paste-from-office/src/pastefromoffice.js';
import SimpleUploadAdapter from '@ckeditor/ckeditor5-upload/src/adapters/simpleuploadadapter.js';
import Table from '@ckeditor/ckeditor5-table/src/table.js';
import TableToolbar from '@ckeditor/ckeditor5-table/src/tabletoolbar.js';
import TextTransformation from '@ckeditor/ckeditor5-typing/src/texttransformation.js';

import Alignment from '@ckeditor/ckeditor5-alignment/src/alignment.js';  // <--- ADDED


class Editor extends ClassicEditor {}

// Plugins to include in the build.
Editor.builtinPlugins = [
	Autoformat,
	BlockQuote,
	Bold,
	Essentials,
	Heading,
	Image,
	ImageCaption,
	ImageInsert,
	ImageResize,
	ImageStyle,
	ImageToolbar,
	ImageUpload,
	Indent,
	Italic,
	Link,
	List,
	MediaEmbed,
	Paragraph,
	PasteFromOffice,
	SimpleUploadAdapter,
	Table,
	TableToolbar,
	TextTransformation,
	
	Alignment  // <--- ADDED
];

export default Editor;

4. 然后，执行构建的命令，目的是vue使用的并不是这个文件，而且build/ckeditor.js （该文件已经压缩）

npm run build

5. 最后，在Vue组件中，添加对应的属性，代码如下(以下代码已剔除非必要部分)

<template>
<!-- 已在main.js全局引入 -->
	<ckeditor
          :editor="editor"
          v-model="formData.content"
          :config="editorConfig"
          @input="onEditorInput"
        >
        </ckeditor>
</template>

<script>
	import ClassicEditor from '@givebest/ckeditor5-custom-build'
	import '@givebest/ckeditor5-custom-build/build/translations/zh-cn.js'

	export default {
		data() {
			return {
				editor: ClassicEditor,
			      editorConfig: {
			        toolbar: {
			          items: [
			            'heading',
			            '|',
			            'bold',
			            'italic',
			            'underline',  // <--- ADDED
			            'link',
			            'bulletedList',
			            'numberedList',
			            '|',
			            'outdent',
			            'indent',
			            '|',
			            'blockQuote',
			            'insertTable',
			            'mediaEmbed',
			            'undo',
			            'redo',
			            'imageInsert',
			            
			          ],
			        },
			        language: 'zh-cn',
			        image: {
			          toolbar: [
			            'imageTextAlternative',
			            'imageStyle:inline',
			            'imageStyle:block',
			            'imageStyle:side',
			          ],
			        },
			        table: {
			          contentToolbar: ['tableColumn', 'tableRow', 'mergeTableCells'],
			        }
			      },
			}
		}
	}
</script>

以上便完成了基本的插件引入并使用；但是坑还没结束，当我在引入Alignment（对齐）的插件时，报错了！！！

CKEditor -duplicate -modules报错处理

官网文档说明
简单说就是：当由于 CKEditor 5 的安装或初始化方式错误而引发此错误时，它的某些模块被重复（评估并执行了两次），模块重复而导致的错误。

解决方案：
其实网上方法有很多，拉下源码重新编译再替换等等，大同小异，我试过都行不通还是报错，因此认真的查看官网，找解决的途径 —— 最终找到这段话，如下：
官网方案要点

具体操作意思就是：在 node_modules@givebest\ckeditor5-custom-build中将需要安装的插件包，确保都是一个版本或最新版本（@ckeditor/ckeditor5-dev-*除外），才能保证不会报错。因此，我将他们全部打包为最新版本，成功解决，版本如下。