feat: respect for .cjs files and move towards exports fields

.eslintrc.js

@@ -1,4 +1,4 @@
-const extensions = [".mjs", ".js", ".json"];
+const extensions = [".mjs", ".js", ".cjs", ".json"];
 module.exports = {
   root: true,
   extends: [

package.json

@@ -23,9 +23,13 @@
   },
   "license": "MIT",
   "author": "Anton Kudryavtsev <boblobl4@gmail.com>",
-  "main": "dist/index.js",
-  "module": "dist/index.mjs",
-  "types": "dist/index.d.ts",
+  "exports": {
+    "import": "./dist/index.js",
+    "require": "./dist/index.cjs"
+  },
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "files": [
     "dist"
   ],

rollup.config.js

@@ -11,7 +11,7 @@ import resolve from "@rollup/plugin-node-resolve";
 import typescript from "@rollup/plugin-typescript";
 
 import pkg from "./package.json";
-const extensions = [".ts", ".mjs", ".js", ".json"];
+const extensions = [".ts", ".mjs", ".js", ".cjs", ".json"];
 
 /** @type {import('rollup').RollupOptions[]} */
 const config = [

src/.eslintrc.js

@@ -1,5 +1,5 @@
 const { join } = require("path");
-const extensions = [".ts", ".mjs", ".js", ".json"];
+const extensions = [".ts", ".mjs", ".js", ".cjs", ".json"];
 module.exports = {
   root: true,
   extends: [

src/utils/load-module.ts

@@ -5,7 +5,7 @@ const loaded: Record<string, unknown> = {};
 const options: ResolveOpts = {
   caller: "Module loader",
   basedirs: [process.cwd()],
-  extensions: [".js", ".mjs", ".json"],
+  extensions: [".cjs", ".js", ".mjs", ".json"],
   preserveSymlinks: false,
   packageFilter: pkg => pkg,
 };

src/utils/resolve.ts

@@ -6,7 +6,7 @@ export interface ResolveOpts {
   caller?: string;
   /** directories to begin resolving from (defaults to `[__dirname]`) */
   basedirs?: string[];
-  /** array of file extensions to search in order (defaults to `[".mjs", ".js", ".json"]`) */
+  /** array of file extensions to search in order (defaults to `[".mjs", ".js", ".cjs", ".json"]`) */
   extensions?: string | ReadonlyArray<string>;
   /** don't resolve `basedirs` to real path before resolving. (defaults to `true`) */
   preserveSymlinks?: boolean;
@@ -31,7 +31,7 @@ interface Package {
 const defaultOpts: ResolveDefaultOpts = {
   caller: "Resolver",
   basedirs: [__dirname],
-  extensions: [".mjs", ".js", ".json"],
+  extensions: [".mjs", ".js", ".cjs", ".json"],
   preserveSymlinks: true,
   packageFilter(pkg) {
     if (pkg.module) pkg.main = pkg.module;