how to do the preset value for the js version?

[sprappcom]

1. there is preset value that can be appended to the end of the command line in cpp version. how to do the same for js?
2. possible to do one preset "17" for email addresses?

[siara-cc]

If you are looking to add your own strings such as @gmail.com, @yahoo.com, you could use usx_freq_seq parameter to compress() and decompress() functions.

The presets are not useful for this purpose. They can be only useful if your character set is much smaller than the printable 96 characters.