An embeddable JavaScript engine written in Rust, supporting over 90% of the ECMAScript specification.
Boa is an embeddable JavaScript engine written in Rust that lexes, parses, and interprets JavaScript code. It solves the need for a high-performance, standards-compliant JavaScript runtime that can be integrated into Rust applications, supporting over 90% of the ECMAScript specification.
Rust developers looking to embed JavaScript execution in their applications, contributors interested in compiler and interpreter development, and those exploring alternative JavaScript engine implementations.
Developers choose Boa for its Rust-based safety and performance, strong ECMAScript conformance, and modular crate design, which allows for flexible embedding and experimentation compared to larger, more monolithic engines.
Boa is an embeddable Javascript engine written in Rust.
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Implements over 90% of the latest ECMAScript specification with continuous updates, as evidenced by their public test262 results, ensuring strong standards adherence for embedded use.
Leverages Rust's memory safety and concurrency features to reduce common engine bugs, providing a reliable base for high-performance JavaScript execution within Rust applications.
Published as multiple crates like boa_engine and boa_parser, allowing developers to use only necessary components for flexible integration and reuse in Rust projects.
Includes a CLI, REPL, AST dumping, flowgraph generation, and benchmarking utilities, facilitating testing, debugging, and performance analysis directly from the README examples.
Labeled as experimental, Boa may have breaking changes and is not recommended for production use, limiting its adoption in critical systems where stability is paramount.
Missing 10% of the ECMAScript spec could cause compatibility issues with certain JavaScript features, making it risky for applications requiring full standard compliance.
The boa_runtime crate offers basic WebAPI features but lacks the extensive APIs found in browsers or Node.js, restricting its use for web development without additional work.
Enabling Wasm support requires specific feature flags and RustFLAGS configurations, adding setup complexity compared to more plug-and-play engines.