Boa (JavaScript engine)
From Wikipedia, the free encyclopedia
Boa is an open-source JavaScript engine written in Rust.[2] Boa was introduced at JSConf EU 2019 by Jason Williams.[3][4]
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| Original author(s) | Jason Williams |
|---|---|
| Developer(s) | Boa Developers |
| Initial release | 10 June 2019 |
| Stable release | v0.20[1] / 5 December 2024
/ |
| Repository | github |
| Written in | Rust[2] |
| Platform | x86-64, 32-bit ARM, AArch64 |
| Type | JavaScript and WebAssembly engine |
| License | MIT |
| Website | boajs |
Williams created Boa in 2017 after working on Servo and being inspired by the "written from scratch" CSS engine.[5][4] He was eager to work on a JavaScript engine using Rust to learn more about how JavaScript implementations work, since then the project has had over 100 contributors.[3][6] Overtime the engine gained more prominent features such as bytecode compilation,[7] better conformance to the specification and ergonomic API design.[1]
Design
Boa is an open-source implementation of a JavaScript execution engine. The project is developed as a Rust library for embedding the JavaScript engine in Rust applications. Additionally, the authors of Boa provide a command-line interface (CLI) for users to interact with Boa as standalone JavaScript interpreter accessible from a command line.[8]
Boa follows the common interpreter design which approximately consists of a lexer, parser, compiler and bytecode interpreter[8]
Standards
Boa implements the ECMA-262 specification (ECMAScript). As of 6 September 2024 Boa has 88% conformance to Test262[9]
See also
- JerryScript, an ultra-lightweight JavaScript engine
- SpiderMonkey, a JavaScript engine used in Firefox
- List Of ECMAScript engines
References
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