js 动态表格 无法提交

document.getElementById('submitBtn').addEventListener('click', function() {
    // 提交数据的代码
});

function getTableData() {
    let data = [];
    let rows = document.querySelectorAll('#myTable tr');
    rows.forEach(row => {
        let cols = row.querySelectorAll('td');
        let rowData = [];
        cols.forEach(col => {
            rowData.push(col.innerText);
        });
        data.push(rowData);
    });
    return data;
}

function submitData(data) {
    fetch('/submit', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify(data)
    })
    .then(response => response.json())
    .then(result => {
        console.log('Success:', result);
    })
    .catch(error => {
        console.error('Error:', error);
    });
}