$response.excel
Method $response.excel() renders report by provided template and writes it file into the body stream in a efficient way.
Syntax
$response.excel(template, context[, reportName])
Parameters
template
Path to template .xlsx file (string). Example template's content:

context
Data to render (Javascript object)
reportName
Filename for download (string, optional)
Return value
null if success or string error if error.
Example
$response.excel("./template.xlsx", {"name": "John Smith"}, "report.xlsx")