Convert to an ECMAScript module.

action.yml

@@ -23,4 +23,4 @@ inputs:
     required: false
 runs:
   using: node20
-  main: dist/index.js
+  main: dist/index.mjs

eslint.config.mjs

@@ -18,9 +18,6 @@ export default [
   }),
   eslintPluginUnicorn.configs["flat/all"],
   {
-    "languageOptions": {
-      "sourceType": "commonjs"
-    },
     "linterOptions": {
       "reportUnusedDisableDirectives": true
     },
@@ -40,13 +37,5 @@ export default [
       "unicorn/prefer-module": "off",
       "unicorn/prefer-top-level-await": "off"
     }
-  },
-  {
-    "files": [
-      "eslint.config.mjs"
-    ],
-    "languageOptions": {
-      "sourceType": "module"
-    }
   }
 ];

markdownlint-cli2-action.mjs

@@ -1,9 +1,7 @@
 // @ts-check
 
-"use strict";
+import * as core from "@actions/core";
-
+import { main as markdownlintCli2 } from "markdownlint-cli2";
-const core = require("@actions/core");
-const { "main": markdownlintCli2 } = require("markdownlint-cli2");
 
 const logMessage = core.info;
 const outputFormatter = (options) => {

package.json

@@ -7,7 +7,7 @@
     "url": "https://dlaa.me/"
   },
   "license": "MIT",
-  "type": "commonjs",
+  "type": "module",
   "homepage": "https://github.com/DavidAnson/markdownlint-cli2-action",
   "repository": {
     "type": "git",
@@ -16,16 +16,13 @@
   "bugs": "https://github.com/DavidAnson/markdownlint-cli2-action/issues",
   "funding": "https://github.com/sponsors/DavidAnson",
   "scripts": {
-    "build": "ncc build markdownlint-cli2-action.js",
+    "build": "ncc build markdownlint-cli2-action.mjs",
-    "docker-npm-install": "docker run --rm --tty --name npm-install --volume $PWD:/home/workdir --workdir /home/workdir --user node node:16 npm install",
+    "lint": "eslint *.mjs --max-warnings 0 && markdownlint-cli2 *.md",
-    "docker-npm-run-upgrade": "docker run --rm --tty --name npm-run-upgrade --volume $PWD:/home/workdir --workdir /home/workdir --user node node:16 npm run upgrade",
+    "test": "npm run lint && npm run build && git diff --exit-code"
-    "lint": "eslint *.js eslint.config.mjs --max-warnings 0 && markdownlint-cli2 *.md",
-    "test": "npm run lint && npm run build && git diff --exit-code",
-    "upgrade": "npx --yes npm-check-updates --upgrade"
   },
   "dependencies": {
     "@actions/core": "1.11.1",
-    "markdownlint-cli2": "0.16.0"
+    "markdownlint-cli2": "DavidAnson/markdownlint-cli2#esm"
   },
   "devDependencies": {
     "@eslint/js": "9.16.0",