OptionalalphabetWhich base64 alphabet to use.
'base64' (default): standard alphabet (+, /).'base64url': URL-safe alphabet (-, _).OptionallastHow to handle an incomplete final chunk of input.
'loose' (default): accept and decode available bits.'strict': require correct padding; throw on incomplete chunks.'stop-before-partial': silently ignore an incomplete final chunk.
Options for decodeBase64. Mirrors the options accepted by the native
Uint8Array.fromBase64.Since
1.1.0