Prevent passing arrays (#41)

Co-authored-by: Sindre Sorhus <[email protected]>
sindresorhus · Feb 28, 2022 · be6b28f · be6b28f
1 parent 5047229
commit be6b28f
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diff --git a/index.js b/index.js
@@ -61,5 +61,9 @@ export default function mapObject(object, mapper, options) {
 		throw new TypeError(`Expected an object, got \`${object}\` (${typeof object})`);
 	}
 
+	if (Array.isArray(object)) {
+		throw new TypeError('Expected an object, got an array');
+	}
+
 	return _mapObject(object, mapper, options);
 }
diff --git a/test.js b/test.js
@@ -153,6 +153,12 @@ test('validates input', t => {
 	}, {
 		instanceOf: TypeError,
 	});
+
+	t.throws(() => {
+		mapObject([1, 2], (key, value) => [value, key]);
+	}, {
+		instanceOf: TypeError,
+	});
 });
 
 test('__proto__ keys are safely dropped', t => {