atob() return is not limited to ASCII

[dckc]

Docs say it returns ASCII:

endo/packages/base64/atob.js

Line 5 in f845665

* @returns {string} an ASCII string containing decoded data from `encodedData`

not so:

test('really ascii?', t => {
  const data = new Uint8Array([0x6e, 0xf1]);
  const encoded = encodeBase64(data);
  const actual = atob(encoded);
  const ascii = /^[\x20-\x7f]+$/;
  t.log(actual);
  t.regex(actual, ascii);
});

[kriskowal]

Aye, this should be revised to “string where each character’s code point is the value of the corresponding byte in the range 0 to 255” or words to that effect.

https://developer.mozilla.org/en-US/docs/Glossary/Base64