Vue 3 CLI - 如何为Object.entries添加babel polyfill

Question

我有一个依赖(vue2-google-maps),这导致我的Vue应用程序在旧浏览器中出现问题,引发了错误Object.entries.

在polyfill上阅读Vue CLI Docs,我看到它提到尝试加载polyfill babel.config.js.

我的babel.config.js:

module.exports = {
  presets: [
    ['@vue/app', {
      polyfills: [
        'es6.object'
      ]
    }]
  ]
}

抛出错误:

Module build failed (from ./node_modules/babel-loader/lib/index.js):
TypeError: [BABEL] /PROJECT_DIR/src/main.js: Cannot read property 'android' of undefined (While processing: "/PROJECT_DIR/node_modules/@vue/babel-preset-app/index.js")
    at targetEnvironments.filter.environment (/PROJECT_DIR/node_modules/@babel/preset-env/lib/index.js:75:16)
    at Array.filter (<anonymous>)
    at isPluginRequired (/PROJECT_DIR/node_modules/@babel/preset-env/lib/index.js:74:56)
    at includes.filter.item (/PROJECT_DIR/node_modules/@vue/babel-preset-app/index.js:23:12)
    at Array.filter (<anonymous>)
    at getPolyfills (/PROJECT_DIR/node_modules/@vue/babel-preset-app/index.js:22:19)
    at module.exports (/PROJECT_DIR/node_modules/@vue/babel-preset-app/index.js:94:17)
    at loadDescriptor (/PROJECT_DIR/node_modules/@babel/core/lib/config/full.js:163:14)
    at cachedFunction (/PROJECT_DIR/node_modules/@babel/core/lib/config/caching.js:42:19)
    at loadPresetDescriptor (/PROJECT_DIR/node_modules/@babel/core/lib/config/full.js:233:63)
    at config.presets.map.descriptor (/PROJECT_DIR/node_modules/@babel/core/lib/config/full.js:68:19)
    at Array.map (<anonymous>)
    at recurseDescriptors (/PROJECT_DIR/node_modules/@babel/core/lib/config/full.js:66:38)
    at loadFullConfig (/PROJECT_DIR/node_modules/@babel/core/lib/config/full.js:106:6)
    at process.nextTick (/PROJECT_DIR/node_modules/@babel/core/lib/transform.js:28:33)
    at process._tickCallback (internal/process/next_tick.js:112:11)

 @ multi (webpack)-dev-server/client?http://192.168.1.201:8080/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

我究竟做错了什么？我用它创建了这个项目Vue CLI 3.0.3

Answer 1

您需要更改es6.object为es7.object.entries才能Object.entries在旧浏览器上工作。

所以你的/babel.config.js应该如下所示：

module.exports = {
  presets: [
    [
      "@vue/app",
      {
        polyfills: ["es7.object.entries"]
      }
    ]
  ]
};

我在这里找到了polyfills名称：built-in-features.js#L153