add ie11 compat

code by samboylett

Author: aldarund

src/index.ts

@@ -141,15 +141,15 @@ export default function devalue(value: any, level = defaultLogLevel) {
 					}
 					return stringify(json);
 				}
-				const obj = `{${Object.keys(thing).map(key => `${safeKey(key)}:${stringify(thing[key])}`).join(',')}}`;
-				const proto = Object.getPrototypeOf(thing);
-				if (proto === null) {
-					return Object.keys(thing).length > 0
-						? `Object.assign(Object.create(null), ${obj})`
-						: `Object.create(null)`;
+				if (Object.getPrototypeOf(thing) === null) {
+					if (Object.keys(thing).length === 0) {
+						return 'Object.create(null)';
+					}
+
+					return `Object.create(null,{${Object.keys(thing).map(key => `${safeKey(key)}:{writable:true,value:${stringify(thing[key])}}`).join(',')}})`;
 				}
 
-				return obj;
+				return `{${Object.keys(thing).map(key => `${safeKey(key)}:${stringify(thing[key])}`).join(',')}}`;
 		}
 	}
 

test/test.ts

@@ -124,6 +124,8 @@ describe('devalue', () => {
 	describe('misc', () => {
 		test('Object without prototype', Object.create(null), 'Object.create(null)');
 
+		test('Object without prototype with values', Object.assign(Object.create(null), { foo: 1 }), 'Object.create(null,{foo:{writable:true,value:1}})');
+
 		// let arr = [];
 		// arr.x = 42;
 		// test('Array with named properties', arr, `TODO`);