Ruby on Rails

<!-- app/views/layouts/application.html.erb -->
<%= stylesheet_link_tag "https://cdn.jsdelivr.net/npm/@harbour-enterprises/superdoc/dist/style.css" %>

<!-- app/views/documents/edit.html.erb -->
<div id="editor" style="height: 700px"></div>

<script type="module">
  import { SuperDoc } from 'https://cdn.jsdelivr.net/npm/@harbour-enterprises/superdoc/dist/superdoc.es.js';
  
  new SuperDoc({
    selector: '#editor',
    document: '<%= document_path(@document) %>',
    user: {
      name: '<%= current_user.name %>',
      email: '<%= current_user.email %>'
    }
  });
</script>

# app/models/document.rb
class Document < ApplicationRecord
  has_one_attached :file
  belongs_to :user
  
  validates :file, content_type: ['application/vnd.openxmlformats-officedocument.wordprocessingml.document']
end

# app/controllers/documents_controller.rb
class DocumentsController < ApplicationController
  before_action :authenticate_user!
  
  def show
    @document = Document.find(params[:id])
    
    respond_to do |format|
      format.html
      format.docx { redirect_to rails_blob_path(@document.file, disposition: "inline") }
    end
  end
  
  def create
    @document = current_user.documents.build(document_params)
    
    if @document.save
      redirect_to edit_document_path(@document)
    else
      render :new
    end
  end
  
  private
  
  def document_params
    params.require(:document).permit(:file)
  end
end

// app/javascript/controllers/document_editor_controller.js
import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static values = { 
    url: String,
    user: Object
  }
  
  async connect() {
    const { SuperDoc } = await import('@harbour-enterprises/superdoc');
    
    this.superdoc = new SuperDoc({
      selector: this.element,
      document: this.urlValue,
      user: this.userValue
    });
  }
  
  disconnect() {
    this.superdoc = null;
  }
  
  async export() {
    if (this.superdoc) {
      await this.superdoc.export();
    }
  }
}

<!-- Usage in view -->
<div data-controller="document-editor"
     data-document-editor-url-value="<%= rails_blob_path(@document.file) %>"
     data-document-editor-user-value="<%= current_user.to_json %>"
     style="height: 700px">
</div>

<button data-action="document-editor#export">Export</button>

# config/routes.rb
resources :documents do
  member do
    post :upload
  end
end

# app/controllers/documents_controller.rb
def upload
  @document = Document.find(params[:id])
  @document.file.attach(params[:file])
  
  render json: { url: rails_blob_path(@document.file) }
end