fixed #292

Author: arnog

CHANGELOG.md

@@ -38,6 +38,11 @@
   correctly skipped instead of being parsed as `HorizontalSpacing` expressions
   wrapped in `InvisibleOperator`.
 
+- **Fixed `require()` returning empty exports on Node 22+** (#292): Because the
+  package sets `"type": "module"`, Node treated the UMD `.js` files as ESM,
+  breaking the UMD factory pattern. The UMD builds now use a `.cjs` extension so
+  Node always treats them as CommonJS.
+
 ### 0.53.0 _2026-02-21_
 
 #### Runtime and Scoping

package.json

@@ -46,13 +46,13 @@
     ".": {
       "types": "./dist/types/compute-engine.d.ts",
       "import": "./dist/compute-engine.min.esm.js",
-      "require": "./dist/compute-engine.min.umd.js",
+      "require": "./dist/compute-engine.min.umd.cjs",
       "default": "./dist/compute-engine.min.esm.js"
     },
     "./math-json": {
       "types": "./dist/types/math-json.d.ts",
       "import": "./dist/math-json.min.esm.js",
-      "require": "./dist/math-json.min.umd.js",
+      "require": "./dist/math-json.min.umd.cjs",
       "default": "./dist/math-json.min.esm.js"
     }
   },

scripts/build.mjs

@@ -68,7 +68,7 @@ await Promise.all([
   esbuild.build({
     ...BUILD_OPTIONS,
     entryPoints: ['./src/compute-engine.ts'],
-    outfile: './dist/compute-engine.umd.js',
+    outfile: './dist/compute-engine.umd.cjs',
     format: 'iife',
     ...COMPUTE_ENGINE_UMD_OPTIONS,
     globalName: 'ComputeEngine',
@@ -84,7 +84,7 @@ await Promise.all([
   esbuild.build({
     ...BUILD_OPTIONS,
     entryPoints: ['./src/math-json.ts'],
-    outfile: './dist/math-json.umd.js',
+    outfile: './dist/math-json.umd.cjs',
     format: 'iife',
     ...MATH_JSON_UMD_OPTIONS,
     globalName: 'MathJson',
@@ -107,7 +107,7 @@ await Promise.all([
     pure: ['console.assert', 'console.log'],
     minify: true,
     entryPoints: ['./src/compute-engine.ts'],
-    outfile: './dist/compute-engine.min.umd.js',
+    outfile: './dist/compute-engine.min.umd.cjs',
     format: 'iife',
     ...COMPUTE_ENGINE_UMD_OPTIONS,
     globalName: 'ComputeEngine',
@@ -129,7 +129,7 @@ await Promise.all([
     pure: ['console.assert', 'console.log'],
     minify: true,
     entryPoints: ['./src/math-json.ts'],
-    outfile: './dist/math-json.min.umd.js',
+    outfile: './dist/math-json.min.umd.cjs',
     format: 'iife',
     ...MATH_JSON_UMD_OPTIONS,
     globalName: 'MathJson',