babel.config.js

module.exports = {
  presets: [
    [
      "@babel/preset-env",
      {
        useBuiltIns: "usage",
        corejs: 3 // 声明corejs版本
      }
    ]
  ],
  plugins: [
    // [
    //   "@babel/plugin-transform-runtime",
    //   {
    //     absoluteRuntime: false,
    //     corejs: 2,
    //     helpers: true,
    //     regenerator: true,
    //     useESModules: false
    //   }
    // ],

    // Stage 0
    "@babel/plugin-proposal-function-bind",

    // Stage 1
    "@babel/plugin-proposal-export-default-from",
    "@babel/plugin-proposal-logical-assignment-operators",
    ["@babel/plugin-proposal-optional-chaining", { loose: false }],
    ["@babel/plugin-proposal-pipeline-operator", { proposal: "minimal" }],
    ["@babel/plugin-proposal-nullish-coalescing-operator", { loose: false }],
    "@babel/plugin-proposal-do-expressions",

    // Stage 2
    ["@babel/plugin-proposal-decorators", { legacy: true }],
    "@babel/plugin-proposal-function-sent",
    "@babel/plugin-proposal-export-namespace-from",
    "@babel/plugin-proposal-numeric-separator",
    "@babel/plugin-proposal-throw-expressions",

    // Stage 3
    "@babel/plugin-syntax-dynamic-import",
    "@babel/plugin-syntax-import-meta",
    ["@babel/plugin-proposal-class-properties", { loose: false }],
    "@babel/plugin-proposal-json-strings"
  ]
};