JSZip features :
add(name, data [,options])Add a file to the zip file. Supports chaining.
folder(name)Add a directory to the zip file. Supports chaining.
find(needle)Compare a string or regular expression against all of the filenames and returns an informational object for each that matches.
remove(name)Delete a file or folder.
generate(asBytes = false)Generates the complete zip file. By default encoded as base64.