JavaScriptCore

E24803

JavaScript engine software library

JavaScriptCore is Apple’s high-performance JavaScript engine used primarily in the Safari web browser and WebKit-based applications.

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All labels observed (7)

Label	Occurrences
JavaScriptCore canonical	7
JavaScriptCore.framework	2
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 self-linksurface differs ⓘ surface form: JavaScriptCore.framework Objective-C API ⓘ
frameworkName	JavaScriptCore self-linksurface differs ⓘ surface form: JavaScriptCore.framework
implementsFeature	DOM-related JavaScript execution (via WebKit integration) ⓘ ECMAScript ⓘ surface form: ECMAScript runtime semantics
integratedInto	Web Inspector developer tools ⓘ surface form: Safari Web Inspector tooling
license	BSD-like license ⓘ
openSourceProject	WebKit ⓘ
optimizedFor	high performance ⓘ
partOf	WebKit ⓘ surface form: WebKit project
platform	iOS ⓘ iPadOS ⓘ macOS ⓘ tvOS ⓘ watchOS ⓘ
programmingLanguage	C++ ⓘ
providesFeature	Garbage collection ⓘ JavaScript bytecode interpreter ⓘ JavaScript parser ⓘ JavaScript runtime ⓘ Just-in-time compilation ⓘ
relatedTo	JavaScriptCore self-linksurface differs ⓘ surface form: Nitro (Safari JavaScript engine name)
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

Referenced by (14)

Full triples — surface form annotated when it differs from this entity's canonical label.

JavaScript → notableImplementation → JavaScriptCore ⓘ

Apple Safari → usesEngine → JavaScriptCore ⓘ

this entity surface form: Nitro JavaScript engine

Bun → usesJavaScriptEngine → JavaScriptCore ⓘ

ChakraCore → relatedTo → JavaScriptCore ⓘ

JavaScriptCore → exposesAPI → JavaScriptCore self-linksurface differs ⓘ

this entity surface form: JavaScriptCore.framework

JavaScriptCore → frameworkName → JavaScriptCore self-linksurface differs ⓘ

this entity surface form: JavaScriptCore.framework

JavaScriptCore → relatedTo → JavaScriptCore self-linksurface differs ⓘ

this entity surface form: Nitro (Safari JavaScript engine name)

WebKit → basedOn → JavaScriptCore ⓘ

this entity surface form: KJS

WebKit → component → JavaScriptCore ⓘ

WebKit → notableComponent → JavaScriptCore ⓘ

this entity surface form: JavaScriptCore JIT compiler

Safari → usesEngine → JavaScriptCore ⓘ

React Native → supports → JavaScriptCore ⓘ

WebCore → integratesWith → JavaScriptCore ⓘ

QtWebKit → supports → JavaScriptCore ⓘ

this entity surface form: JavaScriptCore as JavaScript engine

All labels observed (7)

How this entity was disambiguated Show

Statements (48)

How these facts were elicited Show

Referenced by (14)

How this entity was disambiguated

How these facts were elicited