转储字节数组为十六进制值

Question

In JavaScript on Firefox, a Uint8Array shows like this on the console, using console.log :

Uint8Array […]
0: 131
1: 165
2: 116
3: 111
4: 112

How can I make it show as hexadecimal values, like this:

Uint8Array […]
0: 0x83
1: 0xa5
2: 0x74
3: 0x6f
4: 0x70

I'm trying to debug some websocket communication and have to look up the bytes in the format specification which only lists the values in hex.

Answer 1

You can't make the console do that (at least I know of no way to do that), but you could transform the array explicitly:

console.log([].map.call(yourArray, x => x.toString(16))

edit — thanks for the correction; the typed arrays return new typed arrays from their .map() .

You could also make it a regular array with Array.from() .