React 中使用富文本編輯器 Braft Editor ，並集成上傳圖片功能

Braft Editor 是基於draft-js開發的富文本編輯器，適用於 React 框架。

1. 安裝

使用npm

npm install braft-editor --save

使用yarn

yarn add braft-editor

2. 基本使用

import React, { Component } from 'react'
import BraftEditor from 'braft-editor'
import 'braft-editor/dist/index.css'

export default class Main extends Component {

  state = {
    editorState: BraftEditor.createEditorState('<p>初始值</p>'), // 設置編輯器初始內容
    outputHTML: '<p></p>' // 編輯器輸出內容
  }

  componentDidMount () {
    this.setState({
      editorState: BraftEditor.createEditorState('<p>hello，<b>world!</b><p>')
    })
  }

  handleChange = (editorState) => {
    this.setState({
      editorState: editorState,
      outputHTML: editorState.toHTML()
    }, () => {
      console.log(editorState)
      console.log(this.state.outputHTML)
    })
  }

  render () {
    const { editorState, outputHTML } = this.state

    return (
      <div>
        <div className="editor-wrapper">
          <BraftEditor
            value={editorState}
            onChange={this.handleChange}
          />
        </div>
      </div>
    )
  }
}

2. 自定義內置控件

Braft Editor使用 controls 屬性指定須要展現的控件；使用contentStyle調整編輯區域的高度。

render () {
      const controls = [
      'undo', 'redo', 'separator',
      'font-size', 'line-height', 'letter-spacing', 'separator',
      'text-color', 'bold', 'italic', 'underline', 'strike-through', 'separator',
      'superscript', 'subscript', 'remove-styles', 'emoji', 'separator', 'text-indent', 'text-align', 'separator',
      'headings', 'list-ul', 'list-ol', 'blockquote', 'code', 'separator',
      'link', 'separator', 'hr', 'separator',
      'media',
      'separator',
      'clear'
    ]

    return (
      <div className="editor-wrapper">
        <BraftEditor
          controls={controls}
          contentStyle={{height: 210, boxShadow: 'inset 0 1px 3px rgba(0,0,0,.1)'}}
        />
      </div>
    )

  }

3. 集成 Ant Design 上傳組件

Braft Editor上傳圖片會默認轉成base64， 下面將使用Ant Design 的上傳組件改爲上傳到服務器的方法：

• 使用ContentUtils來將上傳後的圖片插入到編輯器,安裝：

yarn add braft-utils

• 使用component類型的extendControls將Upload組件集成到編輯器工具欄

import React, { Component } from 'react'
import BraftEditor from 'braft-editor'
import 'braft-editor/dist/index.css'

export default class Main extends Component {

  state = {
    editorState: BraftEditor.createEditorState(null)
  }

  componentDidMount () {
    this.setState({
      editorState: BraftEditor.createEditorState('<p>hello，<b>world!</b><p>')
    })
  }

  onOk = () => {
    this.props.form.validateFields((err, fieldsValue) => {
      if (!err) {
        console.log(fieldsValue)
      }
    })
  }

  beforeUpload = file => {
    this.props.form.setFieldsValue({
      content: ContentUtils.insertMedias(this.props.form.getFieldValue('content'), [{
        type: 'IMAGE',
        url: imgUrl, // imgUrl 爲上傳成功後 後臺返回的url地址
      }])
    return false
  }


  render () {
     const {
      form: { getFieldDecorator },
    } = this.props

    const { editorState } = this.state

    const formItemLayout = {
      labelCol: {
        sm: { span: 4 },
      },
      wrapperCol: {
        sm: { span: 20 },
      },
    }


    const controls = [
      'undo', 'redo', 'separator',
      'font-size', 'line-height', 'letter-spacing', 'separator',
      'text-color', 'bold', 'italic', 'underline', 'strike-through', 'separator',
      'superscript', 'subscript', 'remove-styles', 'emoji', 'separator', 'text-indent', 'text-align', 'separator',
      'headings', 'list-ul', 'list-ol', 'blockquote', 'code', 'separator',
      'link', 'separator', 'hr', 'separator',
      // 'media',
      'separator',
      'clear'
    ]

    const extendControls = [
      {
        key: 'antd-uploader',
        type: 'component',
        component: (
          <Upload
            accept="image/*"
            showUploadList={false}
            beforeUpload={this.beforeUpload}
          >
            {/* 這裏的按鈕最好加上type="button"，以免在表單容器中觸發表單提交，用Antd的Button組件則無需如此 */}
            <button type="button" className="control-item button upload-button" data-title="插入圖片">
              <Icon type="picture" theme="filled" />
            </button>
          </Upload>
        )
      }
    ]

    return (
      <div>
        <div className="editor-wrapper">
          <Form {...formItemLayout}>
            <Form.Item label="標題">
              {getFieldDecorator(`title`, {
                initialValue: '',
                rules: [{ required: true, message: '請輸入標題' }],
              })(
                <Input placeholder="請輸入" allowClear style={{ width: 300 }} />
              )}
            </Form.Item>
            <Form.Item label="內容">
              {getFieldDecorator(`content`, {
                validateTrigger: 'onBlur',
                initialValue: editorState,
                rules: [{ required: true, message: '請輸入內容' }],
              })(
                <BraftEditor
                  className={styles.editorStyle}
                  contentStyle={{ height: 160, boxShadow: 'inset 0 1px 3px rgba(0,0,0,.1)' }}
                  controls={controls}
                  extendControls={extendControls}
                  placeholder="請輸入正文內容"
                />
              )}
            </Form.Item>
            <Form.Item>
              <Button type="primary" onClick={this.onOk}>
                肯定
              </Button>
            </Form.Item>
          </Form>

        </div>
      </div>
    )
  }
}