runjs

Lightweight Rust example that embeds a JavaScript runtime using deno_core.

This repository contains a minimal Rust program that loads and runs JavaScript files from src/ using the Deno core crate. It demonstrates how to host and execute JS from Rust with an embedded runtime.

Requirements:

• Rust toolchain with cargo (stable channel)

Files:

• src/main.rs: Rust entry point that boots the JS runtime.
• src/runtime.js: Runtime helper code used by the Rust host.
• src/example.js: Example JavaScript file demonstrating usage.

Build & Run

Build (debug):

cargo build

Run the program:

cargo run

For an optimized build:

cargo build --release
./target/release/runjs-test

Note: cargo run automatically builds and runs the binary.

How to use

• Edit or add JavaScript files in src/ (for example, src/example.js).
• The Rust host (src/main.rs) will load/execute or import these scripts via the embedded deno_core runtime.

Development tips

• Make small changes to src/example.js and re-run cargo run to iterate quickly.
• Use cargo build --release when benchmarking or preparing a distribution.