Stop bundling dependencies, UMD file (#1057)

Allow users' package managers to satisfy our dependencies,
instead of bundling them all in our compiled output.

(this is like dynamic linking as opposed to static linking for JS)

Author: EzraBrooks

package-lock.json

@@ -7,12 +7,10 @@
   "files": [
     "dist"
   ],
-  "main": "./dist/RosLib.umd.cjs",
   "module": "./dist/RosLib.js",
   "exports": {
     ".": {
-      "import": "./dist/RosLib.js",
-      "require": "./dist/RosLib.umd.cjs"
+      "import": "./dist/RosLib.js"
     }
   },
   "type": "module",
@@ -36,6 +34,7 @@
     "vite": "^7.0.0",
     "vite-plugin-checker": "^0.11.0",
     "vite-plugin-dts": "^4.0.2",
+    "vite-plugin-externalize-deps": "^0.10.0",
     "vitest": "^4.0.3",
     "vitest-fail-on-console": "^0.10.1"
   },

package.json

@@ -2,6 +2,7 @@ import { resolve } from "path";
 import { defineConfig } from "vitest/config";
 import dts from "vite-plugin-dts";
 import checker from "vite-plugin-checker";
+import { externalizeDeps } from "vite-plugin-externalize-deps";
 
 export default defineConfig({
   plugins: [
@@ -20,6 +21,7 @@ export default defineConfig({
         useFlatConfig: true,
       },
     }),
+    externalizeDeps(),
   ],
   build: {
     lib: {
@@ -28,16 +30,7 @@ export default defineConfig({
       name: "ROSLIB",
       // the proper extensions will be added
       fileName: "RosLib",
-    },
-    rollupOptions: {
-      /*
-       * make sure to externalize deps that shouldn't be bundled
-       * into your library
-       */
-      external: ["eventemitter3", "ws", "src/util/decompressPng.js"],
-      output: {
-        globals: { eventemitter3: "EventEmitter3" },
-      },
+      formats: ["es"],
     },
     // Keep synchronized with minimum engine specified in CI & package.json
     target: "node18",