add Uint8Array to/from base64 and hex

[dbushell]

The tc39 Uint8Array to/from base64 and hex proposal is stage 3.

Support for this would significantly reduce boilerplate code.

Examples:

let arr = new Uint8Array([72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100]);
console.log(arr.toBase64());
// 'SGVsbG8gV29ybGQ='
console.log(arr.toHex());
// '48656c6c6f20576f726c64'

let string = 'SGVsbG8gV29ybGQ=';
console.log(Uint8Array.fromBase64(string));
// Uint8Array([72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100])

string = '48656c6c6f20576f726c64';
console.log(Uint8Array.fromHex(string));
// Uint8Array([72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100])

Full spec.

[littledivy]

This needs to be implemented upstream in V8.

Here's the V8 tracking issue: https://issues.chromium.org/issues/42204568

[BlackAsLight]

Out of curiosity, what boilerplate would it decrease? Or really, what do you mean by boilerplate here.

[dbushell]

Maybe "boilerplate" is the wrong word. I mean just having built-in methods would be less of a chore than importing from @std/encoding. Especially when writing temporary code in the REPL.