vue3+ts 可选链或者双问号打包报错问题解决

安装 @babel/plugin-proposal-nullish-coalescing-operator @babel/plugin-proposal-optional-chaining 语法解析模块

yarn add @babel/plugin-proposal-nullish-coalescing-operator
yarn add @babel/plugin-proposal-optional-chaining

在 babel.config.js 中引入模块

plugins: [
  "@babel/plugin-proposal-nullish-coalescing-operator", //双问号语法解析
  "@babel/plugin-proposal-optional-chaining", //可选连语法解析
],