前言
本文将简单讲述CKEditor5的配置、使用，以及如何自定义plugin，第一次写文章，如果有错误，希望大家帮忙指出并且多多包涵。
CKEditor5简介
CKEditor经历多年的风吹雨打，已相对较为成熟，而我们要讲的CKEditor5版本不仅在用法上做出了很大的改变，最重要的是已不再兼容IE，因此有IE需求的同学请使用CKEditor4。
开始
CKEditor5可以分为Classic editor、Inline editor、Balloon editor、Balloon block editor、Document editor五类，本文以Classic Editor为例：
script引入
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CKEditor 5 – Classic editor</title>
<script src="https://cdn.ckeditor.com/ckeditor5/21.0.0/classic/ckeditor.js"></script>
</head>
<body>
<h1>Classic editor</h1>
<div id="editor">
<p>This is some sample content.</p>
</div>
<script>
ClassicEditor
.create( document.querySelector( '#editor' ), {
// config
} )
.then( editor => {
// do something
} )
.catch( error => {
console.error( error );
} );
</script>
</body>
</html>
npm：
npm install --save @ckeditor/ckeditor5-build-classic
代码如下：
import ClassicEditor from '@ckeditor/ckeditor5-build-classic';
ClassicEditor
.create( document.querySelector( '#editor' ), {
// config
} )
.then( editor => {
// get data
console.log(editor.getData());
// set data
editor.setData('<span>test</span>')
} )
.catch( error => {
console.log( error );
} );
此时，已经可以使用基础的editor了。如代码所示，获取内容和设置内容的方法分别为editor.getData()和editor.setData()。
Webpack配置
当使用前端框架时，可能需要配置webpack，具体配置详见：
自定义CKEditor
之前引入的包是官方构建好的包，一般可以满足基本需求，但有时需求并不能如你所愿，所以需要自定义CKEditor功能。
安装依赖：
npm install --save @ckeditor/ckeditor5-editor-classic
npm install --save @ckeditor/ckeditor5-essentials
npm install --save @ckeditor/ckeditor5-paragraph
npm install --save @ckeditor/ckeditor5-basic-styles
npm install --save @ckeditor/ckeditor5-image
安装的依赖中第一项'@ckeditor/ckeditor5-editor-classic'为基础Classic editor；后四项为官方提供的plugin（还有很多，详见https://ckeditor.com/docs/ckeditor5/latest/api）。
代码如下：
import ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';
import Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';
import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';
import Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';
import Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';
import Image from '@ckeditor/ckeditor5-image/src/image';
import ImageCaption from '@ckeditor/ckeditor5-image/src/imagecaption';
ClassicEditor
.create( document.querySelector( '#editor' ), {
plugins: [ Essentials, Paragraph, Bold, Italic, Image, ImageCaption ],
toolbar: [ 'bold', 'italic' ]
} )
.then( editor => {
console.log( 'Editor was initialized', editor );
} )
.catch( error => {
console.error( error.stack );
} );
此时需要注意引入Classic editor并不是在开始中引入的构建好的@ckeditor/ckeditor5-build-classic，而是@ckeditor/ckeditor5-editor-classic，并且在imprort引用时，并不是全引用，而是@ckeditor/ckeditor5-editor-classic/src/classiceditor，否则都会报“ckeditor-duplicated-modules”的错，这个报错的原因是由于CKEditor中有重复引用的情况。
在这里说一下我碰到的百年难得一遇的坑，在npm安装依赖时，正赶上CKEditor5更新npm包，导致前几个包是20.0.0版本，后安装的是21.0.0，导致了“ckeditor-duplicated-modules”报错，wtf！！！所以大家如果遇到这个错，也检查一下版本，如果版本有问题，建议删除node-modules内文件和package-lock.json，重新执行npm install。
新建plugin
安装依赖
npm install --save @ckeditor/ckeditor5-core
npm install --save @ckeditor/ckeditor5-ui
代码如下：
import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
import imageIcon from '@ckeditor/ckeditor5-core/theme/icons/image.svg';
class InsertImage extends Plugin {
init() {
const editor = this.editor;
editor.ui.componentFactory.add( 'insertImage', locale => {
const view = new ButtonView( locale );
view.set( {
label: 'Insert image',
icon: imageIcon,
tooltip: true
} );
// Callback executed once the image is clicked.
view.on( 'execute', () => {
const imageUrl = prompt( 'Image URL' );
editor.model.change( writer => {
const imageElement = writer.createElement( 'image', {
src: imageUrl
} );
// Insert the image in the current selection location.
editor.model.insertContent( imageElement, editor.model.document.selection );
} );
} );
return view;
} );
}
}
合并代码
import ClassicEditor from '@ckeditor/ckeditor5-editor-classic/src/classiceditor';
import Essentials from '@ckeditor/ckeditor5-essentials/src/essentials';
import Paragraph from '@ckeditor/ckeditor5-paragraph/src/paragraph';
import Bold from '@ckeditor/ckeditor5-basic-styles/src/bold';
import Italic from '@ckeditor/ckeditor5-basic-styles/src/italic';
import Image from '@ckeditor/ckeditor5-image/src/image';
import ImageCaption from '@ckeditor/ckeditor5-image/src/imagecaption';
import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
import imageIcon from '@ckeditor/ckeditor5-core/theme/icons/image.svg';
class InsertImage extends Plugin {
init() {
const editor = this.editor;
editor.ui.componentFactory.add( 'insertImage', locale => {
const view = new ButtonView( locale );
view.set( {
label: 'Insert image',
icon: imageIcon,
tooltip: true
} );
// Callback executed once the image is clicked.
view.on( 'execute', () => {
const imageUrl = prompt( 'Image URL' );
editor.model.change( writer => {
const imageElement = writer.createElement( 'image', {
src: imageUrl
} );
// Insert the image in the current selection location.
editor.model.insertContent( imageElement, editor.model.document.selection );
} );
} );
return view;
} );
}
}
ClassicEditor
.create( document.querySelector( '#editor' ), {
plugins: [ Essentials, Paragraph, Bold, Italic, Image, InsertImage, ImageCaption ],
toolbar: [ 'bold', 'italic', 'insertImage' ]
} )
.then( editor => {
console.log( 'Editor was initialized', editor );
} )
.catch( error => {
console.error( error.stack );
} );
这就是添加了insertImage plugin最终代码了，实际项目中建议将plugin和editor实现文件分离，这个plugin较为简单，官方建议将plugin拆分为editing和ui两个模块，如果有时间再给大家更新一个有command个widget的plugin以及写plugin的一些细节介绍。
结语
首次发文，水平有限，大家多多批评，虽然我不一定改，hahahahahahahah...
