cesium webpack 配置

// cesium webpack 配置
// https://cesiumjs.org/tutorials/cesium-and-webpack/
const webpack = require('webpack');
const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');

// The path to the Cesium source code
const cesiumSource = 'node_modules/cesium/Source';
const cesiumWorkers = '../Build/Cesium/Workers';

module.exports = {
  output: {
    // Needed to compile multiline strings in Cesium
    sourcePrefix: '',
  },
  amd: {
    // Enable webpack-friendly use of require in Cesium
    toUrlUndefined: true,
  },
  node: {
    // Resolve node module use of fs
    fs: 'empty',
  },
  resolve: {
    alias: {
      // Cesium module name
      cesium: path.resolve(cesiumSource),
    },
  },
  module: {
    // 解决：Critical dependency: require function is used in a way in which dependencies cannot be statically extracted
    unknownContextCritical: false,
  },
  plugins: [
    // Copy Cesium Assets, Widgets, and Workers to a static directory
    new CopyWebpackPlugin([
      { from: path.join(cesiumSource, cesiumWorkers), to: 'Workers' },
    ]),
    new CopyWebpackPlugin([
      { from: path.join(cesiumSource, 'Assets'), to: 'Assets' },
    ]),
    new CopyWebpackPlugin([
      { from: path.join(cesiumSource, 'Widgets'), to: 'Widgets' },
    ]),
    // 解决：Unable to determine Cesium base URL automatically,…efining a global variable called CESIUM_BASE_URL.
    new webpack.DefinePlugin({
      // Define relative base path in cesium for loading assets
      CESIUM_BASE_URL: JSON.stringify(''),
    }),
  ],
};