base64:base64url/2

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Predicate base64url/2

base64url(+Plain, -Encoded) is det
base64url(-Plain, +Encoded) is det: Translates between plaintext and base64url encoded atom or string. Base64URL encoded values can safely be used as URLs and file names. The use "-" instead of "+", "_" instead of "/" and do not use padding. This implies that the encoded value cannot be embedded inside a longer string.
Equivalent to base64_encoded/3 using the options as(atom), encoding(utf8) and charset(url).