JavaScriptCore
E24803
JavaScriptCore is Apple’s high-performance JavaScript engine used primarily in the Safari web browser and WebKit-based applications.
All labels observed (10)
| Label | Occurrences |
|---|---|
| JavaScriptCore canonical | 10 |
| JavaScriptCore.framework | 2 |
| JavaScript engine | 1 |
| JavaScript runtime | 1 |
| JavaScriptCore (for JXA) | 1 |
| JavaScriptCore JIT compiler | 1 |
| JavaScriptCore as JavaScript engine | 1 |
| KJS | 1 |
| Nitro (Safari JavaScript engine name) | 1 |
| Nitro JavaScript engine | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T192162 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: JavaScriptCore Context triple: [JavaScript, notableImplementation, JavaScriptCore]
-
A.
SpiderMonkey
SpiderMonkey is Mozilla's open-source JavaScript engine, written in C/C++ and used primarily in the Firefox web browser.
-
B.
V8
V8 is Google’s high-performance open-source JavaScript engine, used in Chrome and Node.js to compile and execute JavaScript directly to native machine code.
-
C.
JavaScript
JavaScript is a high-level, dynamic programming language primarily used to create interactive and dynamic content on web pages.
-
D.
ECMAScript
ECMAScript is the official scripting language specification that defines the core features and behavior implemented by JavaScript and related languages.
-
E.
Deno
Deno is a modern, secure JavaScript and TypeScript runtime created by Ryan Dahl as a successor to Node.js, featuring built-in TypeScript support and a permission-based security model.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: JavaScriptCore Target entity description: JavaScriptCore is Apple’s high-performance JavaScript engine used primarily in the Safari web browser and WebKit-based applications.
-
A.
SpiderMonkey
SpiderMonkey is Mozilla's open-source JavaScript engine, written in C/C++ and used primarily in the Firefox web browser.
-
B.
V8
V8 is Google’s high-performance open-source JavaScript engine, used in Chrome and Node.js to compile and execute JavaScript directly to native machine code.
-
C.
JavaScript
JavaScript is a high-level, dynamic programming language primarily used to create interactive and dynamic content on web pages.
-
D.
ECMAScript
ECMAScript is the official scripting language specification that defines the core features and behavior implemented by JavaScript and related languages.
-
E.
Deno
Deno is a modern, secure JavaScript and TypeScript runtime created by Ryan Dahl as a successor to Node.js, featuring built-in TypeScript support and a permission-based security model.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
JavaScript engine
ⓘ
software library ⓘ |
| category |
runtime system
ⓘ
web browser engine component ⓘ |
| developer | Apple Inc. ⓘ |
| exposesAPI |
C API
ⓘ
JavaScriptCore.framework ⓘ
linked to:
JavaScriptCore
Objective-C API ⓘ |
| frameworkName |
JavaScriptCore.framework
ⓘ
linked to:
JavaScriptCore
|
| implementsFeature |
DOM-related JavaScript execution (via WebKit integration)
ⓘ
ECMAScript runtime semantics ⓘ
linked to:
ECMAScript
|
| integratedInto |
Safari Web Inspector tooling
ⓘ
linked to:
Web Inspector developer tools
|
| license | BSD-like license ⓘ |
| openSourceProject | WebKit ⓘ |
| optimizedFor | high performance ⓘ |
| partOf |
WebKit project
ⓘ
linked to:
WebKit
|
| platform |
iOS
ⓘ
iPadOS ⓘ macOS ⓘ tvOS ⓘ watchOS ⓘ |
| programmingLanguage | C++ ⓘ |
| providesFeature |
Garbage collection
ⓘ
JavaScript bytecode interpreter ⓘ JavaScript parser ⓘ JavaScript runtime ⓘ Just-in-time compilation ⓘ |
| relatedTo |
Nitro (Safari JavaScript engine name)
ⓘ
linked to:
JavaScriptCore
|
| replaces | older WebKit JavaScript interpreters ⓘ |
| repository | https://webkit.org ⓘ |
| supportsFeature |
ES6 features (progressively)
ⓘ
generators ⓘ promises ⓘ strict mode ⓘ typed arrays ⓘ |
| supportsLanguage | JavaScript ⓘ |
| supportsOptimization |
JIT compilation
ⓘ
code specialization ⓘ inline caching ⓘ |
| supportsStandard | ECMAScript ⓘ |
| targetArchitecture |
ARM
ⓘ
Apple silicon ⓘ x86_64 ⓘ |
| usedFor |
embedding JavaScript in applications
ⓘ
executing JavaScript in Safari ⓘ running web content in WebKit-based apps ⓘ |
| usedIn |
Safari
ⓘ
WebKit ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: JavaScriptCore Description of subject: JavaScriptCore is Apple’s high-performance JavaScript engine used primarily in the Safari web browser and WebKit-based applications.
Referenced by (20)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: JavaScriptCore
linked to: JavaScriptCore
linked to: JavaScriptCore
linked to: JavaScriptCore
linked to: JavaScriptCore
linked to: JavaScriptCore
linked to: JavaScriptCore
subject linked to:
Bun toolkit
linked to: JavaScriptCore