Javet

Javet is Java + V8 (JAVa + V + EighT). It is an awesome way of embedding Node.js and V8 in Java.

If you like my work, please Star this project. And, you may follow me @sjtucaocao, or visit https://blog.caoccao.com/ or https://caoccao.blogspot.com/. And the official support channel is at discord.

💖 If you like my work, please donate to support me. If you have a retired Mac OS (x86_64) device and are fine with mailing it to me, that will be great because I don't have such device to support the community. Thank you for supporting Javet.

Major Features

CPU Arch	Android	Linux	MacOS	Windows
x86	✔️	❌	❌	❌
x86_64	✔️	✔️	✔️	✔️
arm	✔️	❌	❌	❌
arm64	✔️	✔️	✔️	❌

• Node.js v22.14.0 + V8 v13.5.212.10
• i18n and non-i18n
• Dynamic switch between Node.js and V8 mode
• Polyfill V8 mode with Javenode
• V8 API exposure in JVM
• JavaScript and Java interop
• Native BigInt and Date
• Javet engine pool
• Easy spring integration
• Live debug with Chrome DevTools
• AST analysis with swc4j
• JS, TS, JSX, TSX transformation and transpilation with swc4j
• Enhance JVM via Byte-code with JavetBuddy
• Live interaction with JavetShell

Quick Start

Dependency

Maven

<!-- Core (Must-have) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- Node.js Linux (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-node-linux-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- Node.js Linux (arm64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-node-linux-arm64</artifactId>
    <version>4.1.1</version>
</dependency>

<!-- Node.js Mac OS (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-node-macos-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- Node.js Mac OS (arm64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-node-macos-arm64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- Node.js Windows (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-node-windows-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- V8 Linux (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-v8-linux-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- V8 Linux (arm64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-v8-linux-arm64</artifactId>
    <version>4.1.1</version>
</dependency>

<!-- V8 Mac OS (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-v8-macos-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- V8 Mac OS (arm64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-v8-macos-arm64</artifactId>
    <version>4.1.2</version>
</dependency>

<!-- V8 Windows (x86_64) -->
<dependency>
    <groupId>com.caoccao.javet</groupId>
    <artifactId>javet-v8-windows-x86_64</artifactId>
    <version>4.1.2</version>
</dependency>

Gradle Kotlin DSL

implementation("com.caoccao.javet:javet:4.1.2") // Core (Must-have)
implementation("com.caoccao.javet:javet-node-linux-arm64:4.1.1")
implementation("com.caoccao.javet:javet-node-linux-x86_64:4.1.2")
implementation("com.caoccao.javet:javet-node-macos-arm64:4.1.2")
implementation("com.caoccao.javet:javet-node-macos-x86_64:4.1.2")
implementation("com.caoccao.javet:javet-node-windows-x86_64:4.1.2")
implementation("com.caoccao.javet:javet-v8-linux-arm64:4.1.1")
implementation("com.caoccao.javet:javet-v8-linux-x86_64:4.1.2")
implementation("com.caoccao.javet:javet-v8-macos-arm64:4.1.2")
implementation("com.caoccao.javet:javet-v8-macos-x86_64:4.1.2")
implementation("com.caoccao.javet:javet-v8-windows-x86_64:4.1.2")

Gradle Groovy DSL

implementation 'com.caoccao.javet:javet:4.1.2' // Core (Must-have)
implementation 'com.caoccao.javet:javet-node-linux-arm64:4.1.1'
implementation 'com.caoccao.javet:javet-node-linux-x86_64:4.1.2'
implementation 'com.caoccao.javet:javet-node-macos-arm64:4.1.2'
implementation 'com.caoccao.javet:javet-node-macos-x86_64:4.1.2'
implementation 'com.caoccao.javet:javet-node-windows-x86_64:4.1.2'
implementation 'com.caoccao.javet:javet-v8-linux-arm64:4.1.1'
implementation 'com.caoccao.javet:javet-v8-linux-x86_64:4.1.2'
implementation 'com.caoccao.javet:javet-v8-macos-arm64:4.1.2'
implementation 'com.caoccao.javet:javet-v8-macos-x86_64:4.1.2'
implementation 'com.caoccao.javet:javet-v8-windows-x86_64:4.1.2'

For more detail, please visit the installation page.

Hello Javet

// Node.js Mode
try (V8Runtime v8Runtime = V8Host.getNodeInstance().createV8Runtime()) {
    System.out.println(v8Runtime.getExecutor("'Hello Javet'").executeString());
}

// V8 Mode
try (V8Runtime v8Runtime = V8Host.getV8Instance().createV8Runtime()) {
    System.out.println(v8Runtime.getExecutor("'Hello Javet'").executeString());
}

Sponsors

HiveMQ | SheetJS | momen.app

License

APACHE LICENSE, VERSION 2.0

Blog

• Performance Comparison of GraalJS, Javet and Nashorn
• How to Elegantly Expose JsonNode in V8
• How to Compromise V8 on JVM
• Is TypeScript a Good Choice for a Script Engine?
• Run TypeScript Directly in Java
• SSR — React + Spring Boot with Javet

Documents

• Javet Intro
• Javet Javadoc
• Javet Document Portal