jsfWriteFile seems to get the wrong dLen(data length)

thax!
Yes,i used jswrap_encodeURIComponent before btoa base64 encode for those utf8 multibyte Symbol or characters, and use require('Storage').write("abc.js",decode­URIComponent(atob("Cmcu...DApOw==")),0,1­000); write to the Storage.
use 0,1000 for slicing as the file little big...
atob("Cmcu...DApOw==").length is no problem, i'll try to modify the espruino build