Playground

The Playground runs a browser WASM wrapper around vela_engine. It is intended for quick experiments with syntax, collections, standard methods, diagnostics, and return values.

What It Can Run

The Playground compiles the source in the editor and calls the selected entry function. It can show compiler diagnostics, runtime errors, and JSON output for script-owned return values.

Try small scripts like:

fn main() {
    let scores = { "quest": 5, "raid": 8 };
    return scores["quest"] + scores["raid"];
}

Sandbox Limits

The browser environment does not expose real Rust host objects, server state, filesystem access, or a long-lived application runtime. Host write-through examples, native function registration, persistent state, and hot reload workflows belong in the Rust examples and embedding chapters.

Use the Playground to check language behavior. Use local examples when you need to test the host boundary.

Entry Compile Run

main.vela

Output loading wasm