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let csvFileName = `csv`;const fields = [['uid', 'company', 'corp', 'epv', 'eclick', 'cost', 'acp', 'cash']];
this.baseCustomerDetail.forEach(function(row: any) {            fields.push([                row['user_id'],                row['company'],                row['corp'],                row['epv'],                row['eclick'],                row['cost'],                row['acp'],                row['cash']            ]);        });        fields.forEach(function(item, index) {            let row = item.join(',');            str += index < fields.length ? row + '\n' : row;        });        let link = document.createElement('a');        link.setAttribute('href', 'data:text/csv;charset=gb2312,\ufeff' + str);        link.setAttribute('download', csvFileName + '.csv');        link.click();