| ChakraCoreJavaScriptCoreSpiderMonkeyV8Moddable XS |
|---|
 | Standard Built-in Objects30,248 tests built-ins  | 90% ChakraCore: 80%JavaScriptCore: 88%SpiderMonkey: 95%V8: 97%Moddable XS: 92% |
|---|
 | AggregateError56 tests/built-ins/AggregateError/ | 0% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0% |
| Array5,221 tests/built-ins/Array/ | 99% ChakraCore: 97%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100%Moddable XS: 99% |
| ArrayBuffer160 tests/built-ins/ArrayBuffer/ | 95% ChakraCore: 95%JavaScriptCore: 85%SpiderMonkey: 98%V8: 98%Moddable XS: 97% |
| ArrayIterator.prototype46 tests/built-ins/ArrayIteratorPrototype/ | 95% ChakraCore: 86%JavaScriptCore: 95%SpiderMonkey: 100%V8: 100%Moddable XS: 95% |
| AsyncFromSyncIterator.prototype44 tests/built-ins/AsyncFromSyncIteratorPrototype/ | 80% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| AsyncFunction32 tests/built-ins/AsyncFunction/ | 93% ChakraCore: 87%JavaScriptCore: 93%SpiderMonkey: 100%V8: 93%Moddable XS: 93% |
| AsyncGeneratorFunction40 tests/built-ins/AsyncGeneratorFunction/ | 78% ChakraCore: 0%JavaScriptCore: 95%SpiderMonkey: 100%V8: 100%Moddable XS: 95% |
| AsyncGenerator.prototype90 tests/built-ins/AsyncGeneratorPrototype/ | 79% ChakraCore: 0%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| AsyncIterator.prototype8 tests/built-ins/AsyncIteratorPrototype/ | 80% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Atomics486 tests/built-ins/Atomics/ | 53% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 99%V8: 99%Moddable XS: 71% |
| BigInt134 tests/built-ins/BigInt/ | 59% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 100%V8: 100%Moddable XS: 98% |
| Boolean98 tests/built-ins/Boolean/ | 98% ChakraCore: 97%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100%Moddable XS: 97% |
| DataView910 tests/built-ins/DataView/ | 82% ChakraCore: 54%JavaScriptCore: 73%SpiderMonkey: 100%V8: 99%Moddable XS: 83% |
| Date1,408 tests/built-ins/Date/ | 99% ChakraCore: 98%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100%Moddable XS: 99% |
| decodeURI108 tests/built-ins/decodeURI/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| decodeURIComponent108 tests/built-ins/decodeURIComponent/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| encodeURI60 tests/built-ins/encodeURI/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| encodeURIComponent60 tests/built-ins/encodeURIComponent/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Error80 tests/built-ins/Error/ | 97% ChakraCore: 95%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100%Moddable XS: 95% |
| eval18 tests/built-ins/eval/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| FinalizationGroup136 tests/built-ins/FinalizationGroup/ | 0% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0% |
| Function895 tests/built-ins/Function/ | 92% ChakraCore: 83%JavaScriptCore: 87%SpiderMonkey: 98%V8: 98%Moddable XS: 97% |
| GeneratorFunction40 tests/built-ins/GeneratorFunction/ | 96% ChakraCore: 90%JavaScriptCore: 95%SpiderMonkey: 100%V8: 100%Moddable XS: 95% |
| Generator.prototype114 tests/built-ins/GeneratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| global56 tests/built-ins/global/ | 98% ChakraCore: 92%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Infinity10 tests/built-ins/Infinity/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| isFinite32 tests/built-ins/isFinite/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| isNaN32 tests/built-ins/isNaN/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Iterator.prototype8 tests/built-ins/IteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| JSON280 tests/built-ins/JSON/ | 95% ChakraCore: 83%JavaScriptCore: 92%SpiderMonkey: 100%V8: 100%Moddable XS: 98% |
| Map286 tests/built-ins/Map/ | 99% ChakraCore: 99%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100%Moddable XS: 99% |
| MapIterator.prototype22 tests/built-ins/MapIteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Math546 tests/built-ins/Math/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| NaN10 tests/built-ins/NaN/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| NativeErrors170 tests/built-ins/NativeErrors/ | 92% ChakraCore: 78%JavaScriptCore: 92%SpiderMonkey: 100%V8: 100%Moddable XS: 92% |
| Number562 tests/built-ins/Number/ | 99% ChakraCore: 96%JavaScriptCore: 99%SpiderMonkey: 99%V8: 100%Moddable XS: 99% |
| Object6,244 tests/built-ins/Object/ | 99% ChakraCore: 98%JavaScriptCore: 99%SpiderMonkey: 99%V8: 99%Moddable XS: 99% |
| parseFloat116 tests/built-ins/parseFloat/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| parseInt120 tests/built-ins/parseInt/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Promise942 tests/built-ins/Promise/ | 93% ChakraCore: 78%JavaScriptCore: 97%SpiderMonkey: 94%V8: 100%Moddable XS: 98% |
| Proxy509 tests/built-ins/Proxy/ | 94% ChakraCore: 90%JavaScriptCore: 95%SpiderMonkey: 100%V8: 100%Moddable XS: 85% |
| Reflect274 tests/built-ins/Reflect/ | 99% ChakraCore: 99%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| RegExp2,864 tests/built-ins/RegExp/ | 73% ChakraCore: 49%JavaScriptCore: 88%SpiderMonkey: 67%V8: 89%Moddable XS: 70% |
| RegExpStringIterator.prototype34 tests/built-ins/RegExpStringIteratorPrototype/ | 80% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| Set374 tests/built-ins/Set/ | 99% ChakraCore: 99%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100%Moddable XS: 99% |
| SetIterator.prototype22 tests/built-ins/SetIteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| SharedArrayBuffer114 tests/built-ins/SharedArrayBuffer/ | 59% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 100%V8: 100%Moddable XS: 98% |
| String2,209 tests/built-ins/String/ | 95% ChakraCore: 89%JavaScriptCore: 99%SpiderMonkey: 96%V8: 96%Moddable XS: 93% |
| StringIterator.prototype14 tests/built-ins/StringIteratorPrototype/ | 97% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 85% |
| Symbol164 tests/built-ins/Symbol/ | 93% ChakraCore: 85%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 81% |
| ThrowTypeError26 tests/built-ins/ThrowTypeError/ | 81% ChakraCore: 65%JavaScriptCore: 65%SpiderMonkey: 92%V8: 92%Moddable XS: 92% |
| TypedArray2,106 tests/built-ins/TypedArray/ | 80% ChakraCore: 54%JavaScriptCore: 60%SpiderMonkey: 98%V8: 98%Moddable XS: 89% |
| TypedArrayConstructors1,360 tests/built-ins/TypedArrayConstructors/ | 73% ChakraCore: 43%JavaScriptCore: 42%SpiderMonkey: 95%V8: 94%Moddable XS: 89% |
| undefined12 tests/built-ins/undefined/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100% |
| WeakMap176 tests/built-ins/WeakMap/ | 99% ChakraCore: 98%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100%Moddable XS: 98% |
| WeakRef52 tests/built-ins/WeakRef/ | 0% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0% |
| WeakSet150 tests/built-ins/WeakSet/ | 99% ChakraCore: 98%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100%Moddable XS: 98% |
Test262