Require Node.js 18+

.github/workflows/main.yml

@@ -10,8 +10,9 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 16
-          - 14
+          - 18
+          - 20
+          - 22
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4

index.d.ts

@@ -1,4 +1,4 @@
-import {Primitive, JsonObject} from 'type-fest';
+import {type Primitive, type JsonObject} from 'type-fest';
 
 export {default as errorConstructors} from './error-constructors.js';
 
@@ -19,7 +19,7 @@ export type ErrorLike = {
 	code?: string;
 };
 
-export interface Options {
+export type Options = {
 	/**
 	The maximum depth of properties to preserve when serializing/deserializing.
 
@@ -47,7 +47,7 @@ export interface Options {
 	@default true
 	*/
 	readonly useToJSON?: boolean;
-}
+};
 
 /**
 Serialize an `Error` object into a plain object.

index.js

@@ -128,7 +128,7 @@ const destroyCircular = ({
 	}
 
 	for (const {property, enumerable} of commonProperties) {
-		if (typeof from[property] !== 'undefined' && from[property] !== null) {
+		if (from[property] !== undefined && from[property] !== null) {
 			Object.defineProperty(to, property, {
 				value: isErrorLike(from[property]) ? continueDestroyCircular(from[property]) : from[property],
 				enumerable: forceEnumerable ? true : enumerable,

index.test-d.ts

@@ -1,5 +1,7 @@
 import {expectType, expectAssignable} from 'tsd';
-import {serializeError, deserializeError, ErrorObject, Options} from './index.js';
+import {
+	serializeError, deserializeError, type ErrorObject, type Options,
+} from './index.js';
 
 const error = new Error('unicorn');
 

package.json

@@ -14,7 +14,7 @@
 	"exports": "./index.js",
 	"sideEffects": false,
 	"engines": {
-		"node": ">=14.16"
+		"node": ">=18"
 	},
 	"scripts": {
 		"//test": "xo && ava && tsd",
@@ -38,11 +38,11 @@
 		"deserialize"
 	],
 	"dependencies": {
-		"type-fest": "^2.12.2"
+		"type-fest": "^4.31.0"
 	},
 	"devDependencies": {
-		"ava": "^4.2.0",
-		"tsd": "^0.20.0",
-		"xo": "^0.48.0"
+		"ava": "^6.2.0",
+		"tsd": "^0.31.2",
+		"xo": "^0.60.0"
 	}
 }

test.js

@@ -119,7 +119,7 @@ test('should drop functions', t => {
 
 	const serialized = serializeError(object);
 	t.deepEqual(serialized, {});
-	t.false(Object.prototype.hasOwnProperty.call(serialized, 'a'));
+	t.false(Object.hasOwn(serialized, 'a'));
 });
 
 test('should not access deep non-enumerable properties', t => {
@@ -467,13 +467,19 @@ test('should serialize properties up to `Options.maxDepth` levels deep', t => {
 	t.deepEqual(levelZero, {});
 
 	const levelOne = serializeError(error, {maxDepth: 1});
-	t.deepEqual(levelOne, {message, name, stack, one: {}});
+	t.deepEqual(levelOne, {
+		message, name, stack, one: {},
+	});
 
 	const levelTwo = serializeError(error, {maxDepth: 2});
-	t.deepEqual(levelTwo, {message, name, stack, one: {two: {}}});
+	t.deepEqual(levelTwo, {
+		message, name, stack, one: {two: {}},
+	});
 
 	const levelThree = serializeError(error, {maxDepth: 3});
-	t.deepEqual(levelThree, {message, name, stack, one: {two: {three: {}}}});
+	t.deepEqual(levelThree, {
+		message, name, stack, one: {two: {three: {}}},
+	});
 });
 
 test('should identify serialized errors', t => {