Older style build

This seems to be the simplest way to get ESM and CJS without throwing up issues
due to the intel hex library. It's more similar to microbit-fs.

.npmignore

@@ -22,3 +22,6 @@ examples/
 ## this is generated by `npm pack`
 *.tgz
 package
+
+dist/
+vite.config.*

lib/usb-partial-flashing.ts

@@ -56,11 +56,7 @@ import {
   read32FromUInt8Array,
 } from "./usb-partial-flashing-utils.js";
 import { BoardVersion } from "./device.js";
-
-// Workaround for packaging issues
-import * as Hex from "nrf-intel-hex";
-const MemoryMapClass = (Hex.default as any).default ?? Hex.default;
-type MemoryMap = Hex.default;
+import MemoryMap from "nrf-intel-hex";
 
 type ProgressCallback = (n: number, partial: boolean) => void;
 
@@ -349,12 +345,12 @@ export class PartialFlashing {
   }
 
   private hexStringToPaddedBytes(hex: string): Uint8Array {
-    const m = MemoryMapClass.fromHex(hex);
+    const m = MemoryMap.fromHex(hex);
     return this.memoryMapToPaddedBytes(m);
   }
 
   private paddedBytesToHexString(data: Uint8Array): string {
-    return MemoryMapClass.fromPaddedUint8Array(data).asHexString();
+    return MemoryMap.fromPaddedUint8Array(data).asHexString();
   }
 
   private memoryMapToPaddedBytes(memoryMap: MemoryMap): Uint8Array {

package.json

@@ -1,21 +1,25 @@
 {
   "name": "@microbit/microbit-connection",
   "version": "0.0.0",
-  "type": "module",
   "main": "./build/cjs/index.js",
   "module": "./build/esm/index.js",
   "types": "./build/esm/index.d.ts",
   "exports": {
     ".": {
-      "import": "./build/esm/index.js",
-      "require": "./build/cjs/index.js",
-      "types": "./build/esm/index.d.ts"
+      "import": {
+        "types": "./build/esm/index.d.js",
+        "default": "./build/esm/index.js"
+      },
+      "require": {
+        "types": "./build/cjs/index.d.js",
+        "default": "./build/cjs/index.js"
+      }
     }
   },
   "scripts": {
     "dev": "vite",
-    "build:esm": "tsc -p tsconfig.json",
-    "build:cjs": "tsc -p tsconfig.cjs.json",
+    "build:esm": "tsc -p tsconfig.json && echo '{\"type\": \"module\"}' > build/esm/package.json",
+    "build:cjs": "tsc -p tsconfig.cjs.json && echo '{\"type\": \"commonjs\"}' > build/cjs/package.json",
     "build:lib": "npm run build:esm && npm run build:cjs",
     "build:demo": "vite build --mode=demo",
     "ci": "npm run build:lib && npm run test && npx prettier --check lib src",

tsconfig.json

@@ -2,18 +2,15 @@
   "compilerOptions": {
     "target": "ES2021",
     "useDefineForClassFields": true,
-    "module": "NodeNext",
+    "module": "ESNext",
     "lib": ["ES2020", "DOM", "DOM.Iterable"],
     "skipLibCheck": true,
-
-    /* Bundler mode */
-    "moduleResolution": "NodeNext",
+    "moduleResolution": "node10",
     "isolatedModules": true,
     "moduleDetection": "force",
     "outDir": "build/esm",
     "sourceMap": true,
     "declaration": true,
-
     /* Linting */
     "strict": true,
     "noUnusedLocals": true,