 | Standard Built-in Objects29,653 tests built-ins  | 89% ChakraCore: 81%JavaScriptCore: 88%SpiderMonkey: 90%V8: 98% |
|---|
 | Array5,203 tests/built-ins/Array/ | 99% ChakraCore: 97%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100% |
| ArrayBuffer160 tests/built-ins/ArrayBuffer/ | 94% ChakraCore: 95%JavaScriptCore: 85%SpiderMonkey: 98%V8: 98% |
| ArrayIterator.prototype46 tests/built-ins/ArrayIteratorPrototype/ | 95% ChakraCore: 86%JavaScriptCore: 95%SpiderMonkey: 100%V8: 100% |
| AsyncFromSyncIterator.prototype44 tests/built-ins/AsyncFromSyncIteratorPrototype/ | 75% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| AsyncFunction30 tests/built-ins/AsyncFunction/ | 98% ChakraCore: 93%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| AsyncGeneratorFunction38 tests/built-ins/AsyncGeneratorFunction/ | 75% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| AsyncGenerator.prototype90 tests/built-ins/AsyncGeneratorPrototype/ | 74% ChakraCore: 0%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100% |
| AsyncIterator.prototype8 tests/built-ins/AsyncIteratorPrototype/ | 75% ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Atomics460 tests/built-ins/Atomics/ | 40% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 74%V8: 89% |
| BigInt134 tests/built-ins/BigInt/ | 50% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 100%V8: 100% |
| Boolean96 tests/built-ins/Boolean/ | 98% ChakraCore: 97%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100% |
| DataView910 tests/built-ins/DataView/ | 81% ChakraCore: 54%JavaScriptCore: 73%SpiderMonkey: 100%V8: 99% |
| Date1,388 tests/built-ins/Date/ | 99% ChakraCore: 98%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100% |
| decodeURI106 tests/built-ins/decodeURI/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| decodeURIComponent106 tests/built-ins/decodeURIComponent/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| encodeURI58 tests/built-ins/encodeURI/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| encodeURIComponent58 tests/built-ins/encodeURIComponent/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Error74 tests/built-ins/Error/ | 97% ChakraCore: 94%JavaScriptCore: 97%SpiderMonkey: 100%V8: 100% |
| eval16 tests/built-ins/eval/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Function889 tests/built-ins/Function/ | 92% ChakraCore: 83%JavaScriptCore: 87%SpiderMonkey: 98%V8: 99% |
| GeneratorFunction40 tests/built-ins/GeneratorFunction/ | 95% ChakraCore: 90%JavaScriptCore: 95%SpiderMonkey: 95%V8: 100% |
| Generator.prototype114 tests/built-ins/GeneratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| global58 tests/built-ins/global/ | 98% ChakraCore: 93%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Infinity12 tests/built-ins/Infinity/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| isFinite32 tests/built-ins/isFinite/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| isNaN32 tests/built-ins/isNaN/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Iterator.prototype8 tests/built-ins/IteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| JSON234 tests/built-ins/JSON/ | 94% ChakraCore: 85%JavaScriptCore: 92%SpiderMonkey: 100%V8: 99% |
| Map285 tests/built-ins/Map/ | 99% ChakraCore: 99%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100% |
| MapIterator.prototype22 tests/built-ins/MapIteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Math546 tests/built-ins/Math/ | 99% ChakraCore: 100%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100% |
| NaN12 tests/built-ins/NaN/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| NativeErrors146 tests/built-ins/NativeErrors/ | 95% ChakraCore: 83%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Number562 tests/built-ins/Number/ | 98% ChakraCore: 96%JavaScriptCore: 98%SpiderMonkey: 99%V8: 100% |
| Object6,194 tests/built-ins/Object/ | 99% ChakraCore: 98%JavaScriptCore: 99%SpiderMonkey: 100%V8: 99% |
| parseFloat114 tests/built-ins/parseFloat/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| parseInt118 tests/built-ins/parseInt/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Promise942 tests/built-ins/Promise/ | 83% ChakraCore: 79%JavaScriptCore: 78%SpiderMonkey: 75%V8: 98% |
| Proxy479 tests/built-ins/Proxy/ | 96% ChakraCore: 93%JavaScriptCore: 95%SpiderMonkey: 98%V8: 98% |
| Reflect274 tests/built-ins/Reflect/ | 99% ChakraCore: 99%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| RegExp2,836 tests/built-ins/RegExp/ | 73% ChakraCore: 50%JavaScriptCore: 87%SpiderMonkey: 68%V8: 89% |
| RegExpStringIterator.prototype34 tests/built-ins/RegExpStringIteratorPrototype/ | 50% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 100%V8: 100% |
| Set374 tests/built-ins/Set/ | 99% ChakraCore: 99%JavaScriptCore: 99%SpiderMonkey: 100%V8: 100% |
| SetIterator.prototype22 tests/built-ins/SetIteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| SharedArrayBuffer114 tests/built-ins/SharedArrayBuffer/ | 50% ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 100%V8: 100% |
| String2,135 tests/built-ins/String/ | 97% ChakraCore: 92%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100% |
| StringIterator.prototype14 tests/built-ins/StringIteratorPrototype/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| Symbol162 tests/built-ins/Symbol/ | 95% ChakraCore: 85%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100% |
| ThrowTypeError26 tests/built-ins/ThrowTypeError/ | 80% ChakraCore: 65%JavaScriptCore: 73%SpiderMonkey: 84%V8: 100% |
| TypedArray2,100 tests/built-ins/TypedArray/ | 68% ChakraCore: 55%JavaScriptCore: 60%SpiderMonkey: 60%V8: 98% |
| TypedArrayConstructors1,360 tests/built-ins/TypedArrayConstructors/ | 58% ChakraCore: 43%JavaScriptCore: 42%SpiderMonkey: 51%V8: 94% |
| undefined12 tests/built-ins/undefined/ | 100% ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100% |
| WeakMap176 tests/built-ins/WeakMap/ | 99% ChakraCore: 98%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100% |
| WeakSet150 tests/built-ins/WeakSet/ | 99% ChakraCore: 98%JavaScriptCore: 98%SpiderMonkey: 100%V8: 100% |
Test262