From swift to JavaScript?

Question

JavaScript

I roughly understand how it will look like in js, but I'm not sure enough. Help me convert to JS from SWIFT

let message: [UInt8] = [
            0x01,
            21,
            0xFF,
            0xFF,
            0xFF,
            0xFF,
            0xFF,
            UInt8(target & 0xFF),
            UInt8(target >> 8 & 0xFF)
        ]

Answer 1

let message = new Uint8Array([
    0x01,
    21,
    0xFF,
    0xFF,
    0xFF,
    0xFF,
    0xFF,
    target & 0xFF,
    target >> 8 & 0xFF
]);

Uint8Array