vue-cli3.0打包時如何忽略某個第三方依賴包

前幾天接到了用vue重構某個業務模塊的需求，常規開發不作討論，可是在打包時須要排除業務中使用的某個第三方依賴包。 代碼以下:

//main.js 
import Vue from 'vue';
import Cesium from 'cesium/Cesium'; //必須全局引入，某個組件中引入忽略無效
import Widgets from 'cesium/Widgets/widgets.css'

Vue.prototype.Cesium = Cesium;
複製代碼

//vue.config.js(若是沒有就在根目錄下新建)

const cesiumSource = "node_modules/cesium/Source";
const cesiumWorkers = '../Build/Cesium/Workers';
module.exports = {
    chainWebpack: config => {
        //定義別名
        .resolve.alias.set('cesium', path.resolve(__dirname, cesiumSource)).end().end()
    },
    configureWebpack: config => {
    let settings = {};
    if (process.env.NODE_ENV === 'production') { // 使用環境變量，區分生產和開發模式
      settings = {
        plugins: [
          new webpack.DefinePlugin({
            'CESIUM_BASE_URL': JSON.stringify('static')
          }),
          new CopyWebpackPlugin([{
            from: path.join(cesiumSource, cesiumWorkers),
            to: 'static/Workers'
          }]),
          new CopyWebpackPlugin([{
            from: path.join(cesiumSource, 'Assets'),
            to: 'static/Assets'
          }]),
          new CopyWebpackPlugin([{
            from: path.join(cesiumSource, 'Widgets'),
            to: 'static/Widgets'
          }])
        ],
        externals: {
            /**
            *key: main.js中全局引入的路徑
            *value: 全局暴露出來的對象名
            */
          "cesium/Cesium": "Cesium" //忽略js
          "cesium/Widgets/widgets.css": "Widgets" //忽略css
        }
      }

    } else {
      settings = {
        plugins: [
          new webpack.DefinePlugin({
            'CESIUM_BASE_URL': JSON.stringify('')
          }),
          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'
          }]),
        ]
      }
    }
    return settings
}
複製代碼

that's all