@teakit/napi

    CallInfo

    Raw call info for variadic or dynamic-arity functions. Recognized by type as a function parameter; does not consume a JS argument.

    pub fn sum(env: napi.Env, info: napi.CallInfo) !napi.Val {
    const args = try info.args(env, 16);
    const argc = try info.argCount(env);
    var total: f64 = 0;
    for (0..argc) |i| total += try args[i].to(env, f64);
    return env.toJs(total);
}

    Methods

    MethodReturnsPurpose
    args(env, comptime max: usize)![max]napi.ValExtract up to max arguments. Missing slots filled with undefined.
    argCount(env)!usizeNumber of arguments actually passed.
    this(env)!napi.ValThe this binding of the call.

    args returns a fixed-size array; the size is comptime. Use argCount to know how many slots are real.

    When to use it

    • Variadic functions like sum(...nums).
    • Functions whose argument types depend on runtime conditions (where you would convert each argument with val.to(env, T) based on its observed type).
    • Reaching this from a function that is being called as a method on a JS object.

    For everything else, prefer typed parameters; the bridge does the conversion for you and the result is shorter and clearer.