From 08a58029d91baa1f6ed992ff147ea5c44ecf92fb Mon Sep 17 00:00:00 2001
From: sunrise30 <sunrise.30.yavis@gmail.com>
Date: Wed, 13 Oct 2021 08:47:38 +0200
Subject: [PATCH] chore: migrate to rollup

This change allows us to:

- reduce the size of the bundle
- provide an ESM bundle (for usage in <script type="module">)

Related: https://github.com/socketio/socket.io-client/issues/1198
---
 lib/browser-entrypoint.ts            |   3 +
 package-lock.json                    | 251 +++++++++++++++++++++++++++
 package.json                         |   8 +-
 support/rollup.config.esm.js         |  27 +++
 support/rollup.config.umd.js         |  43 +++++
 support/rollup.config.umd.msgpack.js |  21 +++
 6 files changed, 352 insertions(+), 1 deletion(-)
 create mode 100644 lib/browser-entrypoint.ts
 create mode 100644 support/rollup.config.esm.js
 create mode 100644 support/rollup.config.umd.js
 create mode 100644 support/rollup.config.umd.msgpack.js

diff --git a/lib/browser-entrypoint.ts b/lib/browser-entrypoint.ts
new file mode 100644
index 0000000..8652ad7
--- /dev/null
+++ b/lib/browser-entrypoint.ts
@@ -0,0 +1,3 @@
+import { io } from "./index.js";
+
+export default io;
diff --git a/package-lock.json b/package-lock.json
index dced5e7..95b9633 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1410,6 +1410,87 @@
         "fastq": "^1.6.0"
       }
     },
+    "@rollup/plugin-alias": {
+      "version": "3.1.5",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-alias/-/plugin-alias-3.1.5.tgz",
+      "integrity": "sha512-yzUaSvCC/LJPbl9rnzX3HN7vy0tq7EzHoEiQl1ofh4n5r2Rd5bj/+zcJgaGA76xbw95/JjWQyvHg9rOJp2y0oQ==",
+      "dev": true,
+      "requires": {
+        "slash": "^3.0.0"
+      }
+    },
+    "@rollup/plugin-babel": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-babel/-/plugin-babel-5.3.0.tgz",
+      "integrity": "sha512-9uIC8HZOnVLrLHxayq/PTzw+uS25E14KPUBh5ktF+18Mjo5yK0ToMMx6epY0uEgkjwJw0aBW4x2horYXh8juWw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.10.4",
+        "@rollup/pluginutils": "^3.1.0"
+      }
+    },
+    "@rollup/plugin-commonjs": {
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-commonjs/-/plugin-commonjs-21.0.0.tgz",
+      "integrity": "sha512-XDQimjHl0kNotAV5lLo34XoygaI0teqiKGJ100B3iCU8+15YscJPeqk2KqkqD3NIe1H8ZTUo5lYjUFZyEgASTw==",
+      "dev": true,
+      "requires": {
+        "@rollup/pluginutils": "^3.1.0",
+        "commondir": "^1.0.1",
+        "estree-walker": "^2.0.1",
+        "glob": "^7.1.6",
+        "is-reference": "^1.2.1",
+        "magic-string": "^0.25.7",
+        "resolve": "^1.17.0"
+      },
+      "dependencies": {
+        "estree-walker": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
+          "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
+          "dev": true
+        },
+        "glob": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
+          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        }
+      }
+    },
+    "@rollup/plugin-node-resolve": {
+      "version": "13.0.5",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-node-resolve/-/plugin-node-resolve-13.0.5.tgz",
+      "integrity": "sha512-mVaw6uxtvuGx/XCI4qBQXsDZJUfyx5vp39iE0J/7Hd6wDhEbjHr6aES7Nr9yWbuE0BY+oKp6N7Bq6jX5NCGNmQ==",
+      "dev": true,
+      "requires": {
+        "@rollup/pluginutils": "^3.1.0",
+        "@types/resolve": "1.17.1",
+        "builtin-modules": "^3.1.0",
+        "deepmerge": "^4.2.2",
+        "is-module": "^1.0.0",
+        "resolve": "^1.19.0"
+      }
+    },
+    "@rollup/pluginutils": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-3.1.0.tgz",
+      "integrity": "sha512-GksZ6pr6TpIjHm8h9lSQ8pi8BE9VeubNT0OMJ3B5uZJ8pz73NPiqOtCog/x2/QzM1ENChPKxMDhiQuRHsqc+lg==",
+      "dev": true,
+      "requires": {
+        "@types/estree": "0.0.39",
+        "estree-walker": "^1.0.1",
+        "picomatch": "^2.2.2"
+      }
+    },
     "@sinonjs/commons": {
       "version": "1.8.3",
       "resolved": "https://registry.npmjs.org/@sinonjs/commons/-/commons-1.8.3.tgz",
@@ -1469,6 +1550,12 @@
       "integrity": "sha512-bsjleuRKWmGqajMerkzox19aGbscQX5rmmvvXl3wlIp5gMG1HgkiwPxsN5p070fBDKTNSPgojVbuY1+HWMbFhg==",
       "dev": true
     },
+    "@types/estree": {
+      "version": "0.0.39",
+      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-0.0.39.tgz",
+      "integrity": "sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==",
+      "dev": true
+    },
     "@types/json-schema": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz",
@@ -1499,6 +1586,15 @@
       "integrity": "sha512-Gj7cI7z+98M282Tqmp2K5EIsoouUEzbBJhQQzDE3jSIRk6r9gsz0oUokqIUR4u1R3dMHo0pDHM7sNOHyhulypw==",
       "dev": true
     },
+    "@types/resolve": {
+      "version": "1.17.1",
+      "resolved": "https://registry.npmjs.org/@types/resolve/-/resolve-1.17.1.tgz",
+      "integrity": "sha512-yy7HuzQhj0dhGpD8RLXSZWEkLsV9ibvxvi6EiJ3bkqLAO1RGo0WbkWQiwpRlSFymTJRz0d3k5LM3kkx8ArDbLw==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/sinonjs__fake-timers": {
       "version": "6.0.3",
       "resolved": "https://registry.npmjs.org/@types/sinonjs__fake-timers/-/sinonjs__fake-timers-6.0.3.tgz",
@@ -3542,6 +3638,12 @@
       "integrity": "sha1-skV5w77U1tOWru5tmorn9Ugqt7s=",
       "dev": true
     },
+    "builtin-modules": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-3.2.0.tgz",
+      "integrity": "sha512-lGzLKcioL90C7wMczpkY0n/oART3MbBa8R9OFGE1rJxoVI86u4WAGfEk8Wjv10eKSyTHVGkSo3bvBylCEtk7LA==",
+      "dev": true
+    },
     "builtin-status-codes": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz",
@@ -4543,6 +4645,12 @@
       "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=",
       "dev": true
     },
+    "deepmerge": {
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/deepmerge/-/deepmerge-4.2.2.tgz",
+      "integrity": "sha512-FJ3UgI4gIl+PHZm53knsuSFpE+nESMr7M4v9QcgB7S63Kj/6WqMiFQJpBBYz1Pt+66bZpP3Q7Lye0Oo9MPKEdg==",
+      "dev": true
+    },
     "define-properties": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/define-properties/-/define-properties-1.1.3.tgz",
@@ -5035,6 +5143,12 @@
       "integrity": "sha512-39nnKffWz8xN1BU/2c79n9nB9HDzo0niYUqx6xyqUnyoAnQyyWpOTdZEeiCch8BBu515t4wp9ZmgVfVhn9EBpw==",
       "dev": true
     },
+    "estree-walker": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-1.0.1.tgz",
+      "integrity": "sha512-1fMXF3YP4pZZVozF8j/ZLfvnR8NSIljt56UhbZ5PeeDmmGHpgpdwQt7ITlGvYaQukCvuBRMLEiKiYC+oeIg4cg==",
+      "dev": true
+    },
     "esutils": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/esutils/-/esutils-2.0.3.tgz",
@@ -6846,6 +6960,12 @@
         "is-extglob": "^2.1.1"
       }
     },
+    "is-module": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-module/-/is-module-1.0.0.tgz",
+      "integrity": "sha1-Mlj7afeMFNW4FdZkM2tM/7ZEFZE=",
+      "dev": true
+    },
     "is-number": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
@@ -6879,6 +6999,15 @@
       "integrity": "sha1-IHurkWOEmcB7Kt8kCkGochADRXU=",
       "dev": true
     },
+    "is-reference": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/is-reference/-/is-reference-1.2.1.tgz",
+      "integrity": "sha512-U82MsXXiFIrjCK4otLT+o2NA2Cd2g5MLoOVXUZjIOhLurrRxpEXzI8O0KZHr3IjLvlAH1kTPYSuqer5T9ZVBKQ==",
+      "dev": true,
+      "requires": {
+        "@types/estree": "*"
+      }
+    },
     "is-typedarray": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-typedarray/-/is-typedarray-1.0.0.tgz",
@@ -7278,6 +7407,34 @@
         }
       }
     },
+    "jest-worker": {
+      "version": "26.6.2",
+      "resolved": "https://registry.npmjs.org/jest-worker/-/jest-worker-26.6.2.tgz",
+      "integrity": "sha512-KWYVV1c4i+jbMpaBC+U++4Va0cp8OisU185o73T1vo99hqi7w8tSJfUXYswwqqrjzwxa6KpRK54WhPvwf5w6PQ==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*",
+        "merge-stream": "^2.0.0",
+        "supports-color": "^7.0.0"
+      },
+      "dependencies": {
+        "has-flag": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+          "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "7.2.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+          "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^4.0.0"
+          }
+        }
+      }
+    },
     "js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -7819,6 +7976,15 @@
         "yallist": "^3.0.2"
       }
     },
+    "magic-string": {
+      "version": "0.25.7",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.25.7.tgz",
+      "integrity": "sha512-4CrMT5DOHTDk4HYDlzmwu4FVCcIYI8gauveasrdCu2IKIFOJ3f0v/8MDGJCDL9oD2ppz/Av1b0Nj345H9M+XIA==",
+      "dev": true,
+      "requires": {
+        "sourcemap-codec": "^1.4.4"
+      }
+    },
     "make-dir": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
@@ -7936,6 +8102,12 @@
       "integrity": "sha1-L/CYDJJM+B0LXR+2ARd8uLtWwNA=",
       "dev": true
     },
+    "merge-stream": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/merge-stream/-/merge-stream-2.0.0.tgz",
+      "integrity": "sha512-abv/qOcuPfk3URPfDzmZU1LKmuw8kT+0nIHvKrKgFrwifol/doWcdA4ZqsWQ8ENrFKkd67Mfpo/LovbIUsbt3w==",
+      "dev": true
+    },
     "merge2": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz",
@@ -9705,6 +9877,79 @@
         "inherits": "^2.0.1"
       }
     },
+    "rollup": {
+      "version": "2.58.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.58.0.tgz",
+      "integrity": "sha512-NOXpusKnaRpbS7ZVSzcEXqxcLDOagN6iFS8p45RkoiMqPHDLwJm758UF05KlMoCRbLBTZsPOIa887gZJ1AiXvw==",
+      "dev": true,
+      "requires": {
+        "fsevents": "~2.3.2"
+      },
+      "dependencies": {
+        "fsevents": {
+          "version": "2.3.2",
+          "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+          "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+          "dev": true,
+          "optional": true
+        }
+      }
+    },
+    "rollup-plugin-terser": {
+      "version": "7.0.2",
+      "resolved": "https://registry.npmjs.org/rollup-plugin-terser/-/rollup-plugin-terser-7.0.2.tgz",
+      "integrity": "sha512-w3iIaU4OxcF52UUXiZNsNeuXIMDvFrr+ZXK6bFZ0Q60qyVfq4uLptoS4bbq3paG3x216eQllFZX7zt6TIImguQ==",
+      "dev": true,
+      "requires": {
+        "@babel/code-frame": "^7.10.4",
+        "jest-worker": "^26.2.1",
+        "serialize-javascript": "^4.0.0",
+        "terser": "^5.0.0"
+      },
+      "dependencies": {
+        "commander": {
+          "version": "2.20.3",
+          "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
+          "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+          "dev": true
+        },
+        "source-map": {
+          "version": "0.7.3",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.7.3.tgz",
+          "integrity": "sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==",
+          "dev": true
+        },
+        "source-map-support": {
+          "version": "0.5.20",
+          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.20.tgz",
+          "integrity": "sha512-n1lZZ8Ve4ksRqizaBQgxXDgKwttHDhyfQjA6YZZn8+AroHbsIz+JjwxQDxbp+7y5OYCI8t1Yk7etjD9CRd2hIw==",
+          "dev": true,
+          "requires": {
+            "buffer-from": "^1.0.0",
+            "source-map": "^0.6.0"
+          },
+          "dependencies": {
+            "source-map": {
+              "version": "0.6.1",
+              "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+              "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+              "dev": true
+            }
+          }
+        },
+        "terser": {
+          "version": "5.9.0",
+          "resolved": "https://registry.npmjs.org/terser/-/terser-5.9.0.tgz",
+          "integrity": "sha512-h5hxa23sCdpzcye/7b8YqbE5OwKca/ni0RQz1uRX3tGh8haaGHqcuSqbGRybuAKNdntZ0mDgFNXPJ48xQ2RXKQ==",
+          "dev": true,
+          "requires": {
+            "commander": "^2.20.0",
+            "source-map": "~0.7.2",
+            "source-map-support": "~0.5.20"
+          }
+        }
+      }
+    },
     "run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -10322,6 +10567,12 @@
       "integrity": "sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=",
       "dev": true
     },
+    "sourcemap-codec": {
+      "version": "1.4.8",
+      "resolved": "https://registry.npmjs.org/sourcemap-codec/-/sourcemap-codec-1.4.8.tgz",
+      "integrity": "sha512-9NykojV5Uih4lgo5So5dtw+f0JgJX30KCNI8gwhz2J9A15wD0Ml6tjHKwf6fTSa6fAdVBdZeNOs9eJ71qCk8vA==",
+      "dev": true
+    },
     "spdx-correct": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.1.1.tgz",
diff --git a/package.json b/package.json
index 5c0a0bc..9e94b9e 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,10 @@
     "@babel/core": "^7.15.0",
     "@babel/plugin-transform-object-assign": "^7.14.5",
     "@babel/preset-env": "^7.15.0",
+    "@rollup/plugin-alias": "^3.1.5",
+    "@rollup/plugin-babel": "^5.3.0",
+    "@rollup/plugin-commonjs": "^21.0.0",
+    "@rollup/plugin-node-resolve": "^13.0.5",
     "@sinonjs/fake-timers": "^7.1.2",
     "@types/mocha": "^9.0.0",
     "@types/node": "^16.7.6",
@@ -55,6 +59,8 @@
     "mocha": "^3.3.0",
     "prettier": "^2.3.2",
     "rimraf": "^3.0.2",
+    "rollup": "^2.58.0",
+    "rollup-plugin-terser": "^7.0.2",
     "socket.io": "3.0.0",
     "socket.io-browsers": "^1.0.0",
     "socket.io-msgpack-parser": "^3.0.0",
@@ -76,7 +82,7 @@
     "test:node": "mocha --require ts-node/register --reporter dot --require test/support/server.js test/index.js",
     "test:browser": "zuul test/index.js",
     "test:types": "tsd",
-    "build": "npm run compile && webpack --config ./support/webpack.config.js --config ./support/prod.config.js --config ./support/msgpack-parser.config.js",
+    "build": "rollup -c support/rollup.config.umd.js && rollup -c support/rollup.config.esm.js && rollup -c support/rollup.config.umd.msgpack.js",
     "format:check": "prettier --check \"lib/**/*.ts\" \"test/**/*.js\" \"test/**/*.ts\" \"support/**/*.js\"",
     "format:fix": "prettier --write \"lib/**/*.ts\" \"test/**/*.js\" \"test/**/*.ts\" \"support/**/*.js\"",
     "prepack": "npm run compile"
diff --git a/support/rollup.config.esm.js b/support/rollup.config.esm.js
new file mode 100644
index 0000000..1a538d7
--- /dev/null
+++ b/support/rollup.config.esm.js
@@ -0,0 +1,27 @@
+const { nodeResolve } = require("@rollup/plugin-node-resolve");
+const commonjs = require("@rollup/plugin-commonjs");
+const { terser } = require("rollup-plugin-terser");
+
+const version = require("../package.json").version;
+const banner = `/*!
+ * Engine.IO v${version}
+ * (c) 2014-${new Date().getFullYear()} Guillermo Rauch
+ * Released under the MIT License.
+ */`;
+
+module.exports = {
+  input: "./build/esm/index.js",
+  output: {
+    file: "./dist/socket.io.esm.min.js",
+    format: "esm",
+    sourcemap: true,
+    plugins: [terser()],
+    banner,
+  },
+  plugins: [
+    nodeResolve({
+      browser: true,
+    }),
+    commonjs(),
+  ],
+};
diff --git a/support/rollup.config.umd.js b/support/rollup.config.umd.js
new file mode 100644
index 0000000..604ef38
--- /dev/null
+++ b/support/rollup.config.umd.js
@@ -0,0 +1,43 @@
+const { nodeResolve } = require("@rollup/plugin-node-resolve");
+const commonjs = require("@rollup/plugin-commonjs");
+const { babel } = require("@rollup/plugin-babel");
+const { terser } = require("rollup-plugin-terser");
+
+const version = require("../package.json").version;
+const banner = `/*!
+ * Socket.IO v${version}
+ * (c) 2014-${new Date().getFullYear()} Guillermo Rauch
+ * Released under the MIT License.
+ */`;
+
+module.exports = {
+  input: "./build/esm/browser-entrypoint.js",
+  output: [
+    {
+      file: "./dist/socket.io.js",
+      format: "umd",
+      name: "io",
+      sourcemap: true,
+      banner,
+    },
+    {
+      file: "./dist/socket.io.min.js",
+      format: "umd",
+      name: "io",
+      sourcemap: true,
+      plugins: [terser()],
+      banner,
+    },
+  ],
+  plugins: [
+    nodeResolve({
+      browser: true,
+    }),
+    commonjs(),
+    babel({
+      babelHelpers: "bundled",
+      presets: [["@babel/env"]],
+      plugins: ["@babel/plugin-transform-object-assign"],
+    }),
+  ],
+};
diff --git a/support/rollup.config.umd.msgpack.js b/support/rollup.config.umd.msgpack.js
new file mode 100644
index 0000000..48b01db
--- /dev/null
+++ b/support/rollup.config.umd.msgpack.js
@@ -0,0 +1,21 @@
+const base = require("./rollup.config.umd.js");
+const alias = require("@rollup/plugin-alias");
+
+module.exports = {
+  ...base,
+  output: {
+    ...base.output[1],
+    file: "./dist/socket.io.msgpack.min.js",
+  },
+  plugins: [
+    alias({
+      entries: [
+        {
+          find: "socket.io-parser",
+          replacement: "socket.io-msgpack-parser",
+        },
+      ],
+    }),
+    ...base.plugins,
+  ],
+};