isBase64URL

Checks if a string is Base64URL encoded.

Syntax

isBase64URL(value: string): boolean

Parameters

Name	Type	Description
value	string	The string to be checked

Returns

Type	Description
boolean	Returns true if the string is in Base64URL format, otherwise false

Example

isBase64URL("U29tZV9kYWRvLQ"); // true
isBase64URL("U29tZSBkYWRv"); // false
isBase64URL(12345); // throws TypeError

Notes

• Throws a TypeError if the value is not a string.
• Base64URL uses the characters A-Z, a-z, 0-9, _, and -.

References

• RFC 4648 - Base64URL