vue3怎么使用vueup/vue-quill富文本并限制输入字数

npm install @vueup/vue-quill@alpha --save

import { QuillEditor } from '@vueup/vue-quill'
import '@vueup/vue-quill/dist/vue-quill.snow.css';
app.component('QuillEditor',QuillEditor)

<quill-editor
 v-model:content="htmlValue"
 ref="myQuillEditor"
 contentType="html"
 :options="editorOption"
 @update:content="onEditorChange($event)">
</quill-editor>
<div class="editor_length">{{ TiLength }}/500</div>

      const htmlValue=ref("")
      const TiLength =ref(0)
      const myQuillEditor=ref(null)
      const editorOption=reactive({
        theme: "snow", // 主题    
        // debug: 'info',
        placeholder: "请输入其他说明",
        modules: {
          toolbar: {
            container: [
              ["bold", "italic", "underline", "strike"],
              ["blockquote", "code-block"],
              [{ header: 1 }, { header: 2 }],
              [{ list: "ordered" }, { list: "bullet" }],
              [{ script: "sub" }, { script: "super" }],
              [{ indent: "-1" }, { indent: "+1" }],
              [{ direction: "rtl" }],
              [{ size: ["small", false, "large", "huge"] }],
              [{ header: [1, 2, 3, 4, 5, 6, false] }],
              [{ color: [] }, { background: [] }],
              // [{ font: [] }],
              [{ align: [] }]
              // ["clean", "link", "image"]
              // ['addBtn']
            ] // 自定义工具栏选项
          }
        }
      })
      const onEditorChange=(e)=>{
        // console.log(myQuillEditor.value.getText().length);
        // console.log(TiLength.value);
        TiLength.value =myQuillEditor.value.getText().length-1
        if(TiLength.value>500){
          myQuillEditor.value.setText(myQuillEditor.value.getText().slice(0,500))
          return
          }
      }
        
        return{
        htmlValue,editorOption,onEditorChange,TiLength,myQuillEditor  }