['!cols'] is undefined

I am trying to modify XLS files and keeping the visibility values for columns.

I am using ^0.14.3 inside a web worker with Angular ^8.0.0.

However, whenever I read an XLS file, ['!cols'] is not defined in the worksheet object, even though there are hidden columns in the file. So it is impossible for me to retrieve the ‘hidden’ values for the columns.

Am I missing something? !ref and !margins are there.

Here’s the web worker code:

/// <reference lib="webworker" />

declare function importScripts(...urls: string[]): void;

declare function postMessage(message: any): any;

declare const XLSX: any;

addEventListener('message', ({ data }) => {

    let str = `${data.window.protocol}//path/to/xlsx.full.min.js`;

    importScripts(str);

    const xls = XLSX.read(data.file, { type: 'array' });

    const sheet = xls.Sheets[xls.SheetNames[0]];

    console.log(sheet['!cols']);    // returns undefined

    // (...)

    postMessage(xls);

});

Below function sits in a service and spins up a Worker for every file from a FileList

loadXLS(files: FileList, values: {}, loc: string) {
        Array.from(files).forEach(file => {
            const worker = new Worker('../excel.worker.ts', {
                type: 'module'
            });
            const reader: FileReader = new FileReader();
            reader.readAsArrayBuffer(file);
            reader.onloadend = (e: any) => {
                worker.onmessage = ({ data }) => {
                    XLSX.writeFile(data, file.name);
                };
                worker.postMessage({ file: new Uint8Array(e.target.result), locale: loc, val: values, window: this.inputWindow });
            };
        });
    }

Here’s a branch that provides an implementation example: https://github.com/fripso/kupshred/tree/missingcols

[SheetJSDev]

@fripso for XLSX format, cellStyles: true must be set to extract column metadata.

@cjl-df “range is wrong” is almost always an issue in the file. XLS has a Dimension record and XLSX also has a way of specifying range, so the reader will set the range based on what that file reports (even if cells exist outside). We’d be glad to take a look at a sample file if you can share one

[cjl-df]

but how to decide the font style