XLSX.read is not a function Electron JS

Dears, I’m fairly new to this thing, so let me know what info I’m missing: VSCode Electron 11 Trying to read a local excel file in browser.

What I tried:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.16.9/xlsx.core.min.js"></script>

AND (not simultaneously)

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.16.9/xlsx.full.min.js"></script>

What happened: I wrote the html file, and opened it in chrome (87.0 64bit, latest as of 2021-jan-03) It worked fine, reading alright. Then I npm-started the project in VSCode, and I got: “Uncaught TypeError: XLSX.read is not a function at FileReader.filereader.onload”

My Code Snippet:

`<script type="text/javascript">

    let resultingJSON;
    function selectFile() 
    {
        let selectedFile;
        document.getElementById('file').click();
        document.getElementById('file').addEventListener('change', function (e)
        {
            selectedFile = e.target.files[0];
            var fileReader = new FileReader();
            fileReader.readAsBinaryString(selectedFile);
            fileReader.onload = (event)=>
            {                
                let data = event.target.result;
                let workbook = XLSX.read(data,{type:"binary"});
                let workSheet = workbook.Sheets["Sheet1"];
                resultingJSON = XLSX.utils.sheet_to_json(workSheet);
            }
        });
    }
</script>`