Decodes a Base64-encoded string in URL Safe format into bytes.
decodeURLSafe(string)
string
A base64-encoded string in URL Safe format.
A Uint8Array with decoded bytes.
Throws an error if the string is not a valid base64 string.
base64.decodeURLSafe("AQID_w")
Uint8Array [1, 2, 3, 255]