chore: restore the debug package in the dev bundle

The debug package was not included anymore in the dev bundle since the
migration from webpack to rollup ([1]) in version 6.0.0.

[1]: 27de300

See also: 4683a95

package.json

@@ -65,6 +65,7 @@
     "@babel/preset-env": "^7.12.7",
     "@fails-components/webtransport": "^0.1.7",
     "@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/debug": "^4.1.12",
@@ -96,7 +97,7 @@
     "test:node": "mocha --bail --require test/support/hooks.js test/index.js test/webtransport.mjs",
     "test:node-fetch": "USE_FETCH=1 npm run test:node",
     "test:browser": "zuul test/index.js",
-    "build": "rollup -c support/rollup.config.umd.js && rollup -c support/rollup.config.esm.js",
+    "build": "rimraf ./dist && rollup -c support/rollup.config.umd.js && rollup -c support/rollup.config.esm.js",
     "bundle-size": "node support/bundle-size.js",
     "format:check": "prettier --check 'lib/**/*.ts' 'test/**/*.js' 'test/webtransport.mjs' 'support/**/*.js'",
     "format:fix": "prettier --write 'lib/**/*.ts' 'test/**/*.js' 'test/webtransport.mjs' 'support/**/*.js'",

support/rollup.config.umd.js

@@ -1,6 +1,7 @@
 const { nodeResolve } = require("@rollup/plugin-node-resolve");
 const { babel } = require("@rollup/plugin-babel");
 const { terser } = require("rollup-plugin-terser");
+const commonjs = require("@rollup/plugin-commonjs");
 
 const version = require("../package.json").version;
 const banner = `/*!
@@ -9,41 +10,63 @@ const banner = `/*!
  * Released under the MIT License.
  */`;
 
-module.exports = {
-  input: "./build/esm/browser-entrypoint.js",
-  output: [
-    {
+module.exports = [
+  {
+    input: "./build/esm-debug/browser-entrypoint.js",
+    output: {
       file: "./dist/engine.io.js",
       format: "umd",
       name: "eio",
       sourcemap: true,
       banner,
     },
-    {
+    plugins: [
+      nodeResolve({
+        browser: true,
+      }),
+      commonjs(),
+      babel({
+        babelHelpers: "bundled",
+        presets: [["@babel/env"]],
+        plugins: [
+          "@babel/plugin-transform-object-assign",
+          [
+            "@babel/plugin-transform-classes",
+            {
+              loose: true,
+            },
+          ],
+        ],
+      }),
+    ],
+  },
+  {
+    input: "./build/esm/browser-entrypoint.js",
+    output: {
       file: "./dist/engine.io.min.js",
       format: "umd",
       name: "eio",
       sourcemap: true,
       plugins: [terser()],
       banner,
     },
-  ],
-  plugins: [
-    nodeResolve({
-      browser: true,
-    }),
-    babel({
-      babelHelpers: "bundled",
-      presets: [["@babel/env"]],
-      plugins: [
-        "@babel/plugin-transform-object-assign",
-        [
-          "@babel/plugin-transform-classes",
-          {
-            loose: true,
-          },
+    plugins: [
+      nodeResolve({
+        browser: true,
+      }),
+      babel({
+        babelHelpers: "bundled",
+        presets: [["@babel/env"]],
+        plugins: [
+          "@babel/plugin-transform-object-assign",
+          [
+            "@babel/plugin-transform-classes",
+            {
+              loose: true,
+            },
+          ],
         ],
-      ],
-    }),
-  ],
-};
+      }),
+    ],
+  },
+];

test/support/hooks.js

@@ -6,7 +6,7 @@ const { createServer } = require("http");
 const { attach } = require("engine.io");
 const { rollup } = require("rollup");
 
-const rollupConfig = require("../../support/rollup.config.umd.js");
+const rollupConfig = require("../../support/rollup.config.umd.js")[1];
 const { serialize } = require("cookie");
 
 let httpServer, engine;
@@ -29,7 +29,7 @@ exports.mochaHooks = {
 
     rollup(rollupConfig).then(async (bundle) => {
       await bundle.write({
-        ...rollupConfig.output[1],
+        ...rollupConfig.output,
         file: "./test/support/public/engine.io.min.js",
         sourcemap: false,
       });

test/support/server.js

@@ -10,11 +10,11 @@ const server = require("engine.io").attach(http, {
 });
 const { rollup } = require("rollup");
 
-const rollupConfig = require("../../support/rollup.config.umd.js");
+const rollupConfig = require("../../support/rollup.config.umd.js")[1];
 
 rollup(rollupConfig).then(async (bundle) => {
   await bundle.write({
-    ...rollupConfig.output[1],
+    ...rollupConfig.output,
     file: "./test/support/public/engine.io.min.js",
     sourcemap: false,
   });