Hi Stranger

Uncaught (in promise) ReferenceError: saveAs is not defined if you want to use saveAs(), you need a module **There is a comment : here is online FileSaver.js just import this saveAs is not defined 에러가뜰때위 스크립트를 삽입하세요!!

When the progress bar jumps 0% -> 100%you should use streamFiles:true at zip.generateAsync refer https://github.com/Stuk/jszip/issues/373

JSZip test sample https://stuk.github.io/jszip/documentation/examples/downloader.html