Large .xlsx file not getting .Sheets

Hello, I am using the newest library of xlsx.js on the client-side (browser). It works reading xlsx files and rendering to HTML table for smaller files.

Now I have a larger xlsx file with 1mil rows. I am getting the sheetNames attributes, but I am not getting the .Sheets object. It is empty. A smaller sub-set of this file reads perfectly.

What could be the error? Thank you very much!

Update: I used the WTF: true read options and receive following errror:

xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js:17317 Uncaught RangeError: Invalid string length
    at Array.join (native)
    at Object.arrayLikeToString [as string] (http://localhost:3000/assets/jszip.self-dcc1caf9dd7a61892574ee6089fd0084b3f35682d2f9a06604edf5ba62b4c505.js?body=1:1932:19)
    at Object.exports.transformTo (http://localhost:3000/assets/jszip.self-dcc1caf9dd7a61892574ee6089fd0084b3f35682d2f9a06604edf5ba62b4c505.js?body=1:2052:50)
    at ZipObject.dataToString (http://localhost:3000/assets/jszip.self-dcc1caf9dd7a61892574ee6089fd0084b3f35682d2f9a06604edf5ba62b4c505.js?body=1:712:24)
    at ZipObject.asBinary (http://localhost:3000/assets/jszip.self-dcc1caf9dd7a61892574ee6089fd0084b3f35682d2f9a06604edf5ba62b4c505.js?body=1:760:29)
    at getdatastr (http://localhost:3000/assets/xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js?body=1:1556:38)
    at getdata (http://localhost:3000/assets/xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js?body=1:1573:95)
    at getzipdata (http://localhost:3000/assets/xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js?body=1:1594:19)
    at safe_parse_sheet (http://localhost:3000/assets/xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js?body=1:17300:14)
    at parse_zip (http://localhost:3000/assets/xlsx.self-4eba00dc4b89315f21b672499210ec51d971b33bc29739752e402683284d8353.js?body=1:17429:3)

[kisaragi99]

Need help. I have the same error message as jensJJ had. Tried to parse calendar_stress_test file. (74mb, 1 million rows) https://github.com/SheetJS/sheetjs/issues/61#issuecomment-47676371 Converted it to xlsx.

Got this error.

If im not mistaken - the issue with V8 max string length is obsolete and the size of sheet1 (572mb) should be fine?

Archive:  calendar_stress_test_copy.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
     1348  01-01-1980 00:00   [Content_Types].xml
      733  01-01-1980 00:00   _rels/.rels
      831  01-01-1980 00:00   xl/_rels/workbook.xml.rels
     1393  01-01-1980 00:00   xl/workbook.xml
      383  01-01-1980 00:00   xl/sharedStrings.xml
     7646  01-01-1980 00:00   xl/theme/theme1.xml
     2285  01-01-1980 00:00   xl/styles.xml
572078353  01-01-1980 00:00   xl/worksheets/sheet1.xml
    38292  01-01-1980 00:00   docProps/thumbnail.jpeg
      792  01-01-1980 00:00   docProps/app.xml
168383066  01-01-1980 00:00   xl/calcChain.xml
      593  01-01-1980 00:00   docProps/core.xml
---------                     -------
740515715                     12 files

But, it worked perfectly in Firefox - approx 2 minutes.

(No browser extensions enabled in both chrome and firefox)

[Kaiido]

Today was holiday here and I had time to make a simple Proof-Of-Concept of my idea in https://github.com/SheetJS/sheetjs/issues/792#issuecomment-785733626

You can see it at https://xml-stream-parsing-poc.glitch.me/

Sorry it is very fast written since I lack time, and it might make your eyes get out of their orbit seeing how bad my xlsx parser is (I really just wanted to somehow log the values in my sheet), but it at least shows that it should be possible to implement such an xml stream parser in your library too.
Using that I was able to parse 60MB+ files in Chrome, while SheetJS fails to read these.

However the speed of parsing obviously suffers from this streaming method, but I believe it’s preferable to have a slower parser than to not be able to parse some files, moreover when this allows to add some kind of a progress event.