ES Module

.eslintrc.json

@@ -11,7 +11,8 @@
         "SharedArrayBuffer": "readonly"
     },
     "parserOptions": {
-        "ecmaVersion": 2018
+        "ecmaVersion": 13,
+        "sourceType": "module"
     },
     "rules": {
     }

index.js

@@ -1,5 +1,5 @@
-const core = require('@actions/core');
-const wait = require('./wait');
+import core from '@actions/core';
+import { wait } from './wait.js';
 
 
 // most @actions toolkit packages have async methods

index.test.js

@@ -1,7 +1,11 @@
-const wait = require('./wait');
-const process = require('process');
-const cp = require('child_process');
-const path = require('path');
+import { wait } from './wait.js';
+import process from 'process';
+import cp from 'child_process';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
 
 test('throws invalid number', async () => {
   await expect(wait('foo')).rejects.toThrow('milliseconds not a number');

jest.config.json

@@ -0,0 +1,4 @@
+{
+  "verbose": true,
+  "transform": {}
+}

package.json

@@ -3,10 +3,11 @@
   "version": "1.0.0",
   "description": "JavaScript Action Template",
   "main": "index.js",
+  "type": "module",
   "scripts": {
     "lint": "eslint .",
     "prepare": "ncc build index.js -o dist --source-map --license licenses.txt",
-    "test": "jest",
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "all": "npm run lint && npm run prepare && npm run test"
   },
   "repository": {

wait.js

@@ -7,4 +7,4 @@ let wait = function (milliseconds) {
   });
 };
 
-module.exports = wait;
+export { wait };