react-map-gl:未捕获ReferenceError:未定义_typeof

Question

尝试使用react-map-gl，但无法获得最简单的库示例。当我尝试渲染地图时，控制台中出现了这个奇怪的错误，我无法理解：

Uncaught ReferenceError: _typeof is not defined
    at mr (blob:http://localhos…6-19b5d5c80288:4993)
    at blob:http://localhos…6-19b5d5c80288:6740
    at new Fn (blob:http://localhos…6-19b5d5c80288:6757)
    at new Jn (blob:http://localhos…6-19b5d5c80288:7040)
    at blob:http://localhos…6-19b5d5c80288:8992
    at blob:http://localhos…-19b5d5c80288:14153

有时它会变成这样：

Uncaught ReferenceError: _typeof is not defined
    at mr (0bcc60f9-25f2-4a56-8906-ebd57645a06c:4993)
    at 0bcc60f9-25f2-4a56-8906-ebd57645a06c:6740
    at new Fn (0bcc60f9-25f2-4a56-8906-ebd57645a06c:6757)
    at new Jn (0bcc60f9-25f2-4a56-8906-ebd57645a06c:7040)
    at 0bcc60f9-25f2-4a56-8906-ebd57645a06c:8992
    at 0bcc60f9-25f2-4a56-8906-ebd57645a06c:14153

带有mapbox徽标的地图框架只渲染其他内容。

我在Rails 6上安装了这些包：

"dependencies": {
  "@babel/preset-react": "^7.0.0",
  "@rails/actioncable": "^6.0.0-alpha",
  "@rails/activestorage": "^6.0.0-alpha",
  "@rails/ujs": "^6.0.0-alpha",
  "@rails/webpacker": "^4.0.7",
  "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
  "prop-types": "^15.7.2",
  "react": "^16.9.0",
  "react-dom": "^16.9.0",
  "react-map-gl": "^5.0.10"
}

我的代码：

import React, { Component } from 'react';
import ReactMapGL from 'react-map-gl';
import 'mapbox-gl/dist/mapbox-gl.css';

class Map extends Component {
  state = {
    viewport: {
      latitude: 20.827873989993776,
      longitude: -73.86145304236818,
      zoom: 3,
    },
  };

  render() {
    return (
      <ReactMapGL
        mapboxApiAccessToken={[TOKEN]}
        {...this.state.viewport}
        onViewportChange={viewport => this.setState({ viewport })}
      />
    );
  }
}

export default Map;

用谷歌搜索了整个下午的错误，但什么也没找到。

Answer 1

从@JakeWorth评论的相关mapbox-gl问题中，我能够从其中引用的文档良好的PR中找到解决方案：https://github.com/lewagon/rails-templates/pull/81

在config/webpack/environment.js中添加以下代码行可以防止Babel转译node_modules中的包，这就是我的问题的原因。

environment.loaders.delete('nodeModules');