web-view 报错

Uncaught SyntaxError: Unexpected token . at http://152.136.138.22:8012/pdfjs/build/pdf.js:2267

async getXfa() {
return this._transport._htmlForXfa?.children[this._pageIndex] || null;
}

Uncaught SyntaxError: Unexpected token ? at http://152.136.138.22:8012/pdfjs/web/viewer.js:245

if (defaultOption !== undefined) {  
  return defaultOption.compatibility ?? defaultOption.value;  
}  

会报错在pc的各种浏览器都没事手机的浏览器也没事就用uniapp的web插件报错