check whether a string is a base64url encoded string or not
string to be checked
true if the string is a Base64URL encoded string
isBase64
isBase64URL("YWE") -> trueisBase64URL("YW-") -> trueisBase64URL("YW+") -> false Copy
isBase64URL("YWE") -> trueisBase64URL("YW-") -> trueisBase64URL("YW+") -> false
check whether a string is a base64url encoded string or not