vue3 引用vue-ueditor-wrap中百度编辑器ueditor实例，字数统计

        <vue-ueditor-wrapv-model="content":config="myConfig"editor-id="editor-demo-01"@ready="ready"></vue-ueditor-wrap>

   ready (editorInstance) {this.editorInstance = editorInstance}

拿到this.editorInstance后可以调用所有实例的api了

参考vue-ueditor-wrap的文档vue-ueditor-wrap - Vue + UEditor + v-model双向绑定Vue + UEditor + v-model双向绑定https://hc199421.gitee.io/vue-ueditor-wrap/#/api

纯文本的字数统计就是this.editorInstance.getContentTxt().length

完。