Test262 Report

About

Filter Engines

JavaScript Engines

JunJulAugSepOctNovDecJan 2019FebMarAprMayJunJulAugSep
All Features
New Features
ChakraCoreJavaScriptCoreSpiderMonkeyV8Moddable XS
Current folder:Features20,677 tests
features
(source)
46%
ChakraCore: 15%JavaScriptCore: 27%SpiderMonkey: 42%V8: 59%Moddable XS: 85%
Folder:
Array.prototype.flat28 tests/Array.prototype.flat/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Array.prototype.flatMap35 tests/Array.prototype.flatMap/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Atomic Operations460 tests/Atomics/
53%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 99%V8: 99%Moddable XS: 69%
Folder:
BigInt2,259 tests/BigInt/
58%
ChakraCore: 4%JavaScriptCore: 5%SpiderMonkey: 94%V8: 97%Moddable XS: 88%
Folder:
Class Fields Private1,769 tests/class-fields-private/
58%
ChakraCore: 39%JavaScriptCore: 40%SpiderMonkey: 40%V8: 74%Moddable XS: 99%
Folder:
Class Fields3,498 tests/class-fields-public/
43%
ChakraCore: 13%JavaScriptCore: 13%SpiderMonkey: 31%V8: 61%Moddable XS: 99%
Folder:
Class Private Methods and Getter/Setters3,243 tests/class-methods-private/
35%
ChakraCore: 20%JavaScriptCore: 20%SpiderMonkey: 20%V8: 20%Moddable XS: 98%
Folder:
Class Static Fields Private640 tests/class-static-fields-private/
40%
ChakraCore: 3%JavaScriptCore: 3%SpiderMonkey: 3%V8: 89%Moddable XS: 100%
Folder:
Class Static Fields Public72 tests/class-static-fields-public/
67%
ChakraCore: 47%JavaScriptCore: 44%SpiderMonkey: 44%V8: 100%Moddable XS: 100%
Folder:
Class Static Methods Private2,812 tests/class-static-methods-private/
28%
ChakraCore: 10%JavaScriptCore: 10%SpiderMonkey: 10%V8: 10%Moddable XS: 98%
Folder:
Dynamic Import1,038 tests/dynamic-import/
65%
ChakraCore: 22%JavaScriptCore: 84%SpiderMonkey: 84%V8: 89%Moddable XS: 48%
Folder:
`export * as namespace from module`36 tests/export-star-as-namespace-from-module/
51%
ChakraCore: 44%JavaScriptCore: 22%SpiderMonkey: 22%V8: 94%Moddable XS: 72%
Folder:
FinalizationGroup140 tests/FinalizationGroup/
0%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0%
Folder:
Global this4 tests/globalThis/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Hashbang Grammar35 tests/hashbang/
89%
ChakraCore: 62%JavaScriptCore: 82%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
import.meta46 tests/import.meta/
85%
ChakraCore: 43%JavaScriptCore: 82%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Intl.DateTimeFormat: dateStyle and timeStyle options16 tests/Intl.DateTimeFormat-datetimestyle/
20%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 100%Moddable XS: 0%
Folder:
Intl.DateTimeFormat-dayPeriod24 tests/Intl.DateTimeFormat-dayPeriod/
6%
ChakraCore: 8%JavaScriptCore: 8%SpiderMonkey: 8%V8: 8%Moddable XS: 0%
Folder:
Intl.DateTimeFormat-fractionalSecondDigits18 tests/Intl.DateTimeFormat-fractionalSecondDigits/
8%
ChakraCore: 11%JavaScriptCore: 11%SpiderMonkey: 11%V8: 11%Moddable XS: 0%
Folder:
Intl.DateTimeFormat-quarter2 tests/Intl.DateTimeFormat-quarter/
0%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0%
Folder:
Intl.ListFormat134 tests/Intl.ListFormat/
19%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 98%Moddable XS: 0%
Folder:
Intl.Locale196 tests/Intl.Locale/
18%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 94%Moddable XS: 0%
Folder:
Intl.NumberFormat Unified API8 tests/Intl.NumberFormat-unified/
15%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 75%Moddable XS: 0%
Folder:
Intl.RelativeTimeFormat150 tests/Intl.RelativeTimeFormat/
34%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 76%V8: 98%Moddable XS: 0%
Folder:
Intl.Segmenter144 tests/Intl.Segmenter/
0%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0%
Folder:
ECMAScript ⊃ JSON8 tests/json-superset/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Numeric Separator Literal316 tests/numeric-separator-literal/
84%
ChakraCore: 67%JavaScriptCore: 87%SpiderMonkey: 68%V8: 99%Moddable XS: 99%
Folder:
Object.fromEntries48 tests/Object.fromEntries/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Optional Catch Binding10 tests/optional-catch-binding/
84%
ChakraCore: 20%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Promise.allSettled184 tests/Promise.allSettled/
58%
ChakraCore: 2%JavaScriptCore: 96%SpiderMonkey: 2%V8: 97%Moddable XS: 91%
Folder:
Promise.prototype.finally46 tests/Promise.prototype.finally/
92%
ChakraCore: 100%JavaScriptCore: 100%SpiderMonkey: 95%V8: 100%Moddable XS: 65%
Folder:
proxy-missing-checks6 tests/proxy-missing-checks/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
RegExp s (dotAll) flag34 tests/regexp-dotall/
55%
ChakraCore: 0%JavaScriptCore: 94%SpiderMonkey: 0%V8: 100%Moddable XS: 82%
Folder:
RegExp lookBehind38 tests/regexp-lookbehind/
38%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 100%Moddable XS: 94%
Folder:
RegExp named groups capturing162 tests/regexp-named-groups/
68%
ChakraCore: 71%JavaScriptCore: 67%SpiderMonkey: 71%V8: 30%Moddable XS: 98%
Folder:
RegExp Unicode Property Escapes1,076 tests/regexp-unicode-property-escapes/
46%
ChakraCore: 24%JavaScriptCore: 80%SpiderMonkey: 26%V8: 73%Moddable XS: 26%
Folder:
Shared Memory622 tests/SharedArrayBuffer/
55%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 99%V8: 99%Moddable XS: 77%
Folder:
String Trimming104 tests/string-trimming/
78%
ChakraCore: 7%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 84%
Folder:
String.prototype.matchAll28 tests/String.prototype.matchAll/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Async Iteration and Generators1,068 tests/Symbol.asyncIterator/
57%
ChakraCore: 0%JavaScriptCore: 64%SpiderMonkey: 67%V8: 67%Moddable XS: 90%
Folder:
Symbol.prototype.description14 tests/Symbol.prototype.description/
82%
ChakraCore: 14%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%
Folder:
Tail Call Optimization40 tests/tail-call-optimization/
40%
ChakraCore: 15%JavaScriptCore: 70%SpiderMonkey: 20%V8: 20%Moddable XS: 77%
Folder:
WeakRef64 tests/WeakRef/
0%
ChakraCore: 0%JavaScriptCore: 0%SpiderMonkey: 0%V8: 0%Moddable XS: 0%
Folder:
Well-formed JSON.stringify2 tests/well-formed-json-stringify/
80%
ChakraCore: 0%JavaScriptCore: 100%SpiderMonkey: 100%V8: 100%Moddable XS: 100%