js.rs

JavaScript in Rust Syntax (= Rust with GC 😂)

Slowly working in progress.

Why?

• Rust's restrictions make development slow
• Usually JavaScript runs fast enough
• Learning a new syntax is hard for both human and LLMs
• Rust Syntax is nice
  • Enum and Pattern Matching
  • Block as Expression
  • proc-macro is powerful

How?

• Transpiler: Rust -> JavaScript with do-expressions -> JavaScript
• IDE Support: Full IDE support powered by Volar.js
• Runtime: Just using JavaScript runtime

Example

🚀 Exactly Rust syntax + JavaScript runtime

fn add_and_print(x: number, y: number) -> number {
  let z = x + y;
  console.log(z);
  z
}

struct Rect(number, number);

impl Rect {
  fn new(width: number, height: number) -> Self {
    Self(width, height)
  }
}

trait Shape {
  fn area(&self) -> number;
}

impl Shape for Rect {
  fn area(&self) -> number {
    self.0 * self.1
  }
}