Fix support for esm

Author: XDGFX

package.json

@@ -2,22 +2,23 @@
     "name": "deep-object-diff",
     "version": "1.2.0",
     "description": "Deep diffs two objects, including nested structures of arrays and objects, and return the difference.",
-    "main": "./dist/cjs/index.js",
-    "module": "./dist/esm/index.js",
+    "main": "./dist/cjs/index.cjs",
+    "module": "./dist/mjs/index.mjs",
+    "type": "module",
     "exports": {
         ".": {
             "import": {
-                "types": "./dist/esm/index.d.ts",
-                "default": "./dist/esm/index.js"
+                "types": "./dist/mjs/index.d.mts",
+                "default": "./dist/mjs/index.mjs"
             },
             "require": {
-                "types": "./dist/cjs/index.d.ts",
-                "default": "./dist/cjs/index.js"
+                "types": "./dist/cjs/index.d.cts",
+                "default": "./dist/cjs/index.cjs"
             }
         }
     },
     "scripts": {
-        "build": "rm -rf dist && tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json",
+        "build": "rm -rf dist && tsc -p tsconfig.cjs.json && tsc -p tsconfig.mjs.json && node ./scripts/build.js",
         "prepare": "npm run build",
         "lint": "eslint src",
         "test": "jest",

scripts/build.js

@@ -0,0 +1,36 @@
+import * as path from "path";
+import * as fs from "fs";
+
+const DIST = "dist";
+const MJS = "mjs";
+const CJS = "cjs";
+const PKG = "package.json";
+const FILES = ["README.md", "LICENSE"];
+
+fs.writeFileSync(
+    path.join(DIST, CJS, PKG),
+    JSON.stringify({ type: "commonjs" }, null, 2)
+);
+fs.writeFileSync(
+    path.join(DIST, MJS, PKG),
+    JSON.stringify({ type: "module" }, null, 2)
+);
+
+// Inside the MJS folder we need to replace all import x from "y" with import x
+// from "y.js"
+fs.readdirSync(path.join(DIST, MJS)).forEach((file) => {
+    const content = fs
+        .readFileSync(path.join(DIST, MJS, file), "utf-8")
+        .replace(/from "([^"]+)"/g, 'from "$1.js"');
+    fs.writeFileSync(path.join(DIST, MJS, file), content);
+});
+
+const pkg = fs.readFileSync(PKG, "utf-8");
+const json = JSON.parse(pkg);
+
+delete json.scripts;
+delete json.devDependencies;
+
+fs.writeFileSync(path.join(DIST, PKG), JSON.stringify(json, null, 2));
+
+FILES.forEach((file) => fs.copyFileSync(file, path.join(DIST, file)));

scripts/build.mjs

@@ -77,7 +77,7 @@
         // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
         // "verbatimModuleSyntax": true,                     /* Do not transform or elide any imports or exports not marked as type-only, ensuring they are written in the output file's format based on the 'module' setting. */
         // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
-        "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
+        // "esModuleInterop": true                           /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
         // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
         "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
 

tsconfig.json

@@ -2,7 +2,7 @@
     "extends": "./tsconfig",
     "compilerOptions": {
         "module": "esnext",
-        "outDir": "./dist/esm"
+        "outDir": "./dist/mjs"
     },
     "exclude": ["test/**/*.ts"]
 }