Question

我在尝试解决React-Leaflet / Leaflet希望定义窗口并导致Gatsby构建npm run build失败时遇到麻烦。

错误消息：

WebpackError: window is not defined

  - leaflet-src.js:230
    ~/leaflet/dist/leaflet-src.js:230:1

  - leaflet-src.js:7 version
    ~/leaflet/dist/leaflet-src.js:7:1

  - leaflet-src.js:10 Object.exports.__esModule
    ~/leaflet/dist/leaflet-src.js:10:2

  - AttributionControl.js:5 Object.<anonymous>
    ~/react-leaflet/lib/AttributionControl.js:5:1

  - index.js:26 Object.exports.__esModule
    ~/react-leaflet/lib/index.js:26:1

  - map.js:2 Object.exports.__esModule
    src/pages/map.js:2:1

Gatsby文档列出了一些可能的方案或解决方案。 https://www.gatsbyjs.org/docs/debugging-html-builds/#fixing-third-party-modules

因此，通过尝试遵循列出的示例，我尝试添加gatsby-node.js

gatsby-node.js

exports.modifyWebpackConfig = ({ config, stage }) => {
  if (stage === 'build-html') {
    config.loader('null', {
      test: /react-leaflet/,
      loader: 'null-loader',
    })
  }
}

test: /leaflet/和test: /react-leaflet/

But that spits out a WebpackError: Minified React error #130

我非常感谢您为摆脱这些构建错误提供的帮助。

非常感谢。

步骤和代码

$ gatsby new leaflet
$ cd leaflet && npm install
安装软件包和依赖项$ npm install react-leaflet leaflet react react-dom
创建了src/pages/map.js
从https://github.com/PaulLeCam/react-leaflet/blob/master/example/components/simple.js

map.js

import React, { Component } from 'react'
import { Map, TileLayer, Marker, Popup } from 'react-leaflet'

export default class SimpleExample extends Component {
  state = {
    lat: 51.505,
    lng: -0.09,
    zoom: 13,
  }

  render() {
    const position = [this.state.lat, this.state.lng]
    return (
      <Map center={position} zoom={this.state.zoom}>
        <TileLayer
          attribution="&amp;copy <a href=&quot;http://osm.org/copyright&quot;>OpenStreetMap</a> contributors"
          url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
        />
        <Marker position={position}>
          <Popup>
            A pretty CSS3 popup. <br /> Easily customizable.
          </Popup>
        </Marker>
      </Map>
    )
  }
}

Answer 1

我将使用您拥有的ModifyWebpackConfig代码。缩小错误是因为现在</script>是一个空模块，当它尝试使用react-leaflet组件构建任何页面时，将导致错误。您必须将地图包装起来以查看窗口是否可用。这样，它将在服务器端渲染中被跳过。

在React中，它看起来像这样。

react-leaflet

Answer 2

根据2019年10月的盖茨比版本，迎接未来的读者; API与OP版本相比有所变化。

gatsby-node.js


exports.onCreateWebpackConfig = ({ stage, loaders, actions }) => {
  if (stage === 'build-html') {
    actions.setWebpackConfig({
      module: {
        rules: [
          {
            test: /react-leaflet|leaflet/,
            use: loaders.null(),
          },
        ],
      },
    })
  }
}

与Gatsby的React-Leaflet

2 个答案: