build: add integration with webpack-bundle-analyzer

Build as follows to build (production) bundle size stats:

npx webpack -p --progress --analyze-bundle

Then open the report:

npx webpack-bundle-analyzer build/stats.json build/

package-lock.json

         "acorn": "^5.0.3"
       }
     },
+    "acorn-walk": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.2.0.tgz",
+      "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
+      "dev": true
+    },
     "ajv": {
       "version": "5.5.2",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
         "tweetnacl": "^0.14.3"
       }
     },
+    "bfj": {
+      "version": "6.1.2",
+      "resolved": "https://registry.npmjs.org/bfj/-/bfj-6.1.2.tgz",
+      "integrity": "sha512-BmBJa4Lip6BPRINSZ0BPEIfB1wUY/9rwbwvIHQA1KjX9om29B6id0wnWXq7m3bn5JrUVjeOTnVuhPT1FiHwPGw==",
+      "dev": true,
+      "requires": {
+        "bluebird": "^3.5.5",
+        "check-types": "^8.0.3",
+        "hoopy": "^0.1.4",
+        "tryer": "^1.0.1"
+      },
+      "dependencies": {
+        "bluebird": {
+          "version": "3.5.5",
+          "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.5.5.tgz",
+          "integrity": "sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==",
+          "dev": true
+        }
+      }
+    },
     "big-integer": {
       "version": "1.6.44",
       "resolved": "https://registry.npmjs.org/big-integer/-/big-integer-1.6.44.tgz",
       "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.4.2.tgz",
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I="
     },
+    "check-types": {
+      "version": "8.0.3",
+      "resolved": "https://registry.npmjs.org/check-types/-/check-types-8.0.3.tgz",
+      "integrity": "sha512-YpeKZngUmG65rLudJ4taU7VLkOCTMhNl/u4ctNC56LQS/zJTyNH0Lrtwm1tfTsbLlwvlfsA2d1c8vCf/Kh2KwQ==",
+      "dev": true
+    },
     "chokidar": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.4.tgz",
         "moment": "^2.19.3"
       }
     },
+    "duplexer": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
+      "integrity": "sha1-rOb/gIwc5mtX0ev5eXessCM0z8E=",
+      "dev": true
+    },
     "duplexify": {
       "version": "3.5.4",
       "resolved": "https://registry.npmjs.org/duplexify/-/duplexify-3.5.4.tgz",
       "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
       "integrity": "sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0="
     },
+    "ejs": {
+      "version": "2.7.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-2.7.1.tgz",
+      "integrity": "sha512-kS/gEPzZs3Y1rRsbGX4UOSjtP/CeJP0CxSNZHYxGfVM/VgLcv0ZqM7C45YyTj2DI2g7+P9Dd24C+IMIg6D0nYQ==",
+      "dev": true
+    },
     "electron-to-chromium": {
       "version": "1.3.34",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.3.34.tgz",
         "object-assign": "^4.0.1"
       }
     },
+    "filesize": {
+      "version": "3.6.1",
+      "resolved": "https://registry.npmjs.org/filesize/-/filesize-3.6.1.tgz",
+      "integrity": "sha512-7KjR1vv6qnicaPMi1iiTcI85CyYwRO/PSFCu6SvqL8jN2Wjt/NIYQTFtFs7fSDCYOstUkEWIQGFUg5YZQfjlcg==",
+      "dev": true
+    },
     "fill-range": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-4.0.0.tgz",
       "resolved": "https://registry.npmjs.org/gud/-/gud-1.0.0.tgz",
       "integrity": "sha512-zGEOVKFM5sVPPrYs7J5/hYEw2Pof8KCyOwyhG8sAF26mCAeUFAcYPu1mwB7hhpIP29zOIBaDqwuHdLp0jvZXjw=="
     },
+    "gzip-size": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/gzip-size/-/gzip-size-5.1.1.tgz",
+      "integrity": "sha512-FNHi6mmoHvs1mxZAds4PpdCS6QG8B4C1krxJsMutgxl5t3+GlRTzzI3NEkifXx2pVsOvJdOGSmIgDhQ55FwdPA==",
+      "dev": true,
+      "requires": {
+        "duplexer": "^0.1.1",
+        "pify": "^4.0.1"
+      },
+      "dependencies": {
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        }
+      }
+    },
     "handle-thing": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/handle-thing/-/handle-thing-2.0.0.tgz",
         }
       }
     },
+    "hoopy": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/hoopy/-/hoopy-0.1.4.tgz",
+      "integrity": "sha512-HRcs+2mr52W0K+x8RzcLzuPPmVIKMSv97RGHy0Ea9y/mpcaK+xTrjICA04KAHi4GRzxliNqNJEFYWHghy3rSfQ==",
+      "dev": true
+    },
     "hosted-git-info": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/hosted-git-info/-/hosted-git-info-2.5.0.tgz",
         "is-wsl": "^1.1.0"
       }
     },
+    "opener": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/opener/-/opener-1.5.1.tgz",
+      "integrity": "sha512-goYSy5c2UXE4Ra1xixabeVh1guIX/ZV/YokJksb6q2lubWu6UbvPQ20p542/sFIll1nl8JnCyK9oBaOcCWXwvA==",
+      "dev": true
+    },
     "optionator": {
       "version": "0.8.2",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.2.tgz",
         "glob": "^7.1.2"
       }
     },
+    "tryer": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/tryer/-/tryer-1.0.1.tgz",
+      "integrity": "sha512-c3zayb8/kWWpycWYg87P71E1S1ZL6b6IJxfb5fvsUgsf0S2MVGaDhDXXjDMpdCpfWXqptc+4mXwmiy1ypXqRAA==",
+      "dev": true
+    },
     "tslib": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.9.3.tgz",
         }
       }
     },
+    "webpack-bundle-analyzer": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/webpack-bundle-analyzer/-/webpack-bundle-analyzer-3.4.1.tgz",
+      "integrity": "sha512-Bs8D/1zF+17lhqj2OYmzi7HEVYqEVxu7lCO9Ff8BwajenOU0vAwEoV8e4ICCPNZAcqR1PCR/7o2SkW+cnCmF0A==",
+      "dev": true,
+      "requires": {
+        "acorn": "^6.0.7",
+        "acorn-walk": "^6.1.1",
+        "bfj": "^6.1.1",
+        "chalk": "^2.4.1",
+        "commander": "^2.18.0",
+        "ejs": "^2.6.1",
+        "express": "^4.16.3",
+        "filesize": "^3.6.1",
+        "gzip-size": "^5.0.0",
+        "lodash": "^4.17.15",
+        "mkdirp": "^0.5.1",
+        "opener": "^1.5.1",
+        "ws": "^6.0.0"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
+          "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+          "dev": true
+        },
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
+          "dev": true
+        },
+        "lodash": {
+          "version": "4.17.15",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz",
+          "integrity": "sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        },
+        "ws": {
+          "version": "6.2.1",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
+          "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
+          "dev": true,
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
     "webpack-cli": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/webpack-cli/-/webpack-cli-3.1.2.tgz",

package.json

     "string-replace-loader": "2.1.1",
     "style-loader": "0.19.0",
     "webpack": "4.26.1",
+    "webpack-bundle-analyzer": "3.4.1",
     "webpack-cli": "3.1.2",
     "webpack-dev-server": "3.1.14"
   },

webpack.config.js

 /* global __dirname */
 
 const process = require('process');
+const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer');
 
 /**
  * The URL of the Jitsi Meet deployment to be proxy to in the context of
 const devServerProxyTarget
     = process.env.WEBPACK_DEV_SERVER_PROXY_TARGET || 'https://beta.meet.jit.si';
 
+const analyzeBundle = process.argv.indexOf('--analyze-bundle') !== -1;
+
 const minimize
     = process.argv.indexOf('-p') !== -1
         || process.argv.indexOf('--optimize-minimize') !== -1;
         publicPath: '/libs/',
         sourceMapFilename: `[name].${minimize ? 'min' : 'js'}.map`
     },
+    plugins: [
+        analyzeBundle
+            && new BundleAnalyzerPlugin({
+                analyzerMode: 'disabled',
+                generateStatsFile: true
+            })
+    ].filter(Boolean),
     resolve: {
         alias: {
             jquery: `jquery/dist/jquery${minimize ? '.min' : ''}.js`