> import ascii from '@aureooms/js-codec-ascii' ;
> import base64 from '@aureooms/js-codec-base64' ;
> let bytes = ascii.encode('any carnal pleasure') ;
> base64.decode( bytes ) ;
'YW55IGNhcm5hbCBwbGVhc3VyZQ=='
> base64.decode( bytes , { variant : 'RFC7515' } ) ;
'YW55IGNhcm5hbCBwbGVhc3VyZQ'
> base64.decode( bytes , { variant : 'Y64' } ) ;
'YW55IGNhcm5hbCBwbGVhc3VyZQ--'
> base64.decode( bytes , { alphabet : 'BCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/A' , padding : '.' } ) ;
'ZX66JHOidn6icDCxcHWid4WzaR..'