vite 支持optional Chaining（可选链判断运算符 ?.）和 nullishCoalescingOperator vitereact.js

vite 支持optional Chaining（可选链判断运算符 ?.）和 nullishCoalescingOperator (空值合并运算符 ??)

安装 babel 可选链判断运算符，空值合并运算符兼容依赖

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

vite.config.ts 添加配置

import { defineConfig } from "vite"; import react from "@vitejs/plugin-react"; import checker from "vite-plugin-checker"; import vitePluginImp from "vite-plugin-imp"; import path from "path"; // https://vitejs.dev/config/ export default defineConfig(({ mode }) => { return { plugins: [ react({ babel: { plugins: [ "@babel/plugin-proposal-optional-chaining", "@babel/plugin-proposal-nullish-coalescing-operator", ], }, }), ], }; });