我们准备了以下脚本将数据下载到CSV文件中：

// Variable to store the final csv data
    var csv = [];
    // Get each row data
    var rows = document.querySelectorAll("table tr");
    // Get each column data
    for(var i = 1; i < rows.length; i++){
            // Stores each csv row data
            var row = [], cols = rows[i].querySelectorAll("td,th");
            for(var j = 0; j < cols.length; j++){
                // Get the text data of each cell
                // of a row and push it to csvrow
                row.push('"' + cols[j].innerText.trim() + '"');                
            }
            // Combine each column value with comma
            csv.push(row.join(",") + "\n");
    }

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问题是我们在每一行的开头都有一个逗号。你能告诉我们如何修复我们的代码来删除这个逗号吗？谢谢！示例输出：

"Host","Version","Country","Brand","Store"
,"test1","5.2","MX","brand","1234"
,"test2","5.2","CA","brand","4321"
,"test3","5.2","US","brand","4444"

型
所需输出：

"Host","Version","Country","Brand","Store"
"test1","5.2","MX","brand","1234"
"test2","5.2","CA","brand","4321"
"test3","5.2","US","brand","4444"

型