flask_crud_app/static/edited_csv.js

function collectEditedData(event) {
    const headers = [...document.querySelectorAll('.table-new-assets thead th')].map(th => th.dataset.attrib);
    const rows = document.querySelectorAll('.table-new-assets tbody tr');
    const assets = [];

    rows.forEach(row => {
        const cells = row.querySelectorAll('td');
        let asset = {};
        headers.forEach((attrib, i) => asset[attrib] = cells[i].innerText);
        assets.push(asset);
    });

    const input = document.createElement('input');
    input.type = 'hidden';
    input.name = 'assets';
    input.value = JSON.stringify(assets);
    document.querySelector('form').appendChild(input);

    event.target.submit();
    return true;
}