tyring suggestion from https://www.sensedeep.com/blog/posts/2021/how-…

…to-create-single-source-npm-module.html

fixup

@@ -0,0 +1,11 @@
+cat >dist/cjs/package.json <<!EOF
+{
+    "type": "commonjs"
+}
+!EOF
+
+cat >dist/mjs/package.json <<!EOF
+{
+    "type": "module"
+}
+!EOF

package.json

@@ -1,16 +1,22 @@
 {
   "name": "near-ca",
-  "module": "index.ts",
   "version": "0.0.0-alpha.1",
   "license": "MIT",
-  "main": "dist/index.js",
+  "main": "dist/cjs/index.js",
+  "module": "dist/mjs/index.js",
+  "exports": {
+      ".": {
+          "import": "./dist/mjs/index.js",
+          "require": "./dist/cjs/index.js"
+      }
+  },
   "types": "dist/index.d.ts",
   "type": "module",
   "files": [
     "dist/**/*"
   ],
   "scripts": {
-    "build": "rm -rf ./dist && tsc",
+    "build": "rm -fr dist/* && tsc -p tsconfig.json && tsc -p tsconfig-cjs.json && ./fixup",
     "lint": "eslint . --ignore-pattern dist/",
     "test": "jest --testTimeout 30000",
     "coverage": "yarn test --coverage",

tsconfig-base.json

@@ -0,0 +1,28 @@
+{
+  "compilerOptions": {
+    "moduleResolution": "Node",
+    "declaration": true,
+    "esModuleInterop": true,
+
+    // Best practices
+    "strict": true,                                      /* Enable all strict type-checking options. */
+    "noImplicitAny": true,                               /* Enable error reporting for expressions and declarations with an implied 'any' type. */
+    "strictNullChecks": true,                            /* When type checking, take into account 'null' and 'undefined'. */
+    "strictFunctionTypes": true,                         /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
+    "strictBindCallApply": true,                         /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
+    "strictPropertyInitialization": true,                /* Check for class properties that are declared but not set in the constructor. */
+    "noImplicitThis": true,                              /* Enable error reporting when 'this' is given the type 'any'. */
+    "useUnknownInCatchVariables": true,                  /* Default catch clause variables as 'unknown' instead of 'any'. */
+    "alwaysStrict": true,                                /* Ensure 'use strict' is always emitted. */
+    "noUnusedLocals": true,                              /* Enable error reporting when local variables aren't read. */
+    "noUnusedParameters": true,                          /* Raise an error when a function parameter isn't read. */
+    "exactOptionalPropertyTypes": true,                  /* Interpret optional property types as written, rather than adding 'undefined'. */
+    "noImplicitReturns": true,                           /* Enable error reporting for codepaths that do not explicitly return in a function. */
+    "noFallthroughCasesInSwitch": true,                  /* Enable error reporting for fallthrough cases in switch statements. */
+    "noUncheckedIndexedAccess": true,     
+    "noPropertyAccessFromIndexSignature": false,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*.ts"],
+  "exclude": ["node_modules", "dist", "examples", "tests", "eslint.config.js"]
+}

tsconfig-cjs.json

@@ -0,0 +1,8 @@
+{
+    "extends": "./tsconfig-base.json",
+    "compilerOptions": {
+        "module": "commonjs",
+        "outDir": "dist/cjs",
+        "target": "ES2020"
+    }
+}

tsconfig.json

@@ -1,32 +1,8 @@
 {
-  "compilerOptions": {
-    "target": "ES2020",
-    "module": "ESNext",
-    "moduleResolution": "Node",
-
-    "declaration": true,
-    "outDir": "dist",
-    "esModuleInterop": true,
-
-    // Best practices
-    "strict": true,                                      /* Enable all strict type-checking options. */
-    "noImplicitAny": true,                               /* Enable error reporting for expressions and declarations with an implied 'any' type. */
-    "strictNullChecks": true,                            /* When type checking, take into account 'null' and 'undefined'. */
-    "strictFunctionTypes": true,                         /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
-    "strictBindCallApply": true,                         /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */
-    "strictPropertyInitialization": true,                /* Check for class properties that are declared but not set in the constructor. */
-    "noImplicitThis": true,                              /* Enable error reporting when 'this' is given the type 'any'. */
-    "useUnknownInCatchVariables": true,                  /* Default catch clause variables as 'unknown' instead of 'any'. */
-    "alwaysStrict": true,                                /* Ensure 'use strict' is always emitted. */
-    "noUnusedLocals": true,                              /* Enable error reporting when local variables aren't read. */
-    "noUnusedParameters": true,                          /* Raise an error when a function parameter isn't read. */
-    "exactOptionalPropertyTypes": true,                  /* Interpret optional property types as written, rather than adding 'undefined'. */
-    "noImplicitReturns": true,                           /* Enable error reporting for codepaths that do not explicitly return in a function. */
-    "noFallthroughCasesInSwitch": true,                  /* Enable error reporting for fallthrough cases in switch statements. */
-    "noUncheckedIndexedAccess": true,     
-    "noPropertyAccessFromIndexSignature": false,
-    "skipLibCheck": true
-  },
-  "include": ["src/**/*.ts"],
-  "exclude": ["node_modules", "dist", "examples", "tests", "eslint.config.js"]
-}
+    "extends": "./tsconfig-base.json",
+    "compilerOptions": {
+        "module": "ESNext",
+        "outDir": "dist/mjs",
+        "target": "ESNext"
+    }
+}