Export excel file using exceljs to client - node.js

Question

I'm trying to export excel file using exceljs library. I'm using AngularJS and NodeJS.
Here is my code:
HTML:
<a class="btn m-b-xs btn-info btn-doc" ng-click="exportExcel()" style='background-color: #34495e; margin-left: 5%;'>
</a>
Controller:
$scope.exportExcel = function() {
$http.post('/api/exportExcel/exportExcel', {"data": $scope.data});
};
NodeJS:
const Excel = require('exceljs');
export async function exportExcel(req, res) {
try {
var workbook = new Excel.Workbook();
var worksheet = workbook.addWorksheet('My Sheet');
worksheet.columns = [
{ header: 'Id', key: 'id', width: 10 },
{ header: 'Name', key: 'name', width: 32 },
{ header: 'D.O.B.', key: 'DOB', width: 10 }
];
worksheet.addRow({id: 1, name: 'John Doe', dob: new Date(1970,1,1)});
worksheet.addRow({id: 2, name: 'Jane Doe', dob: new Date(1965,1,7)});
var tempFilePath = tempfile('.xlsx');
workbook.xlsx.writeFile(tempFilePath).then(function() {
console.log('file is written');
res.sendFile(tempFilePath, function(err){
console.log('---------- error downloading file: ' + err);
});
});
} catch(err) {
console.log('OOOOOOO this is the error: ' + err);
}
}
I've just found this example of code for generating excel just to try get excel file on client side and after that i will create my own file.
But for now i just get in log this error
file is written
(node:25624) UnhandledPromiseRejectionWarning: TypeError: res.sendFile is not a function
Does anyone can help me to get excel file in browser after i click on button for export?
UPDATE
controller:
$scope.exportExcel = function() {
$http.post('/api/exportExcel/exportExcel', {"offer": $scope.offer})
.then(function(response) {
console.log(response.data);
var data = response.data,
blob = new Blob([data], { type: response.headers('content-type') }),
url = $window.URL || $window.webkitURL;
$scope.fileUrl = url.createObjectURL(blob);
});
};
html:
<a class="btn m-b-xs btn-info btn-doc" ng-click="exportExcel()" ng-href="{{ fileUrl }}" download="table.xlsx">
<i class="fa"></i>Export</a>

Answer 1

There were some problems, I have corrected them check and verify.
Definition of Route:-
var express = require("express");
var router = express.Router();
var fs = require("fs");
const Excel = require("exceljs");
var path = require("path");
router.get("/", async function(req, res, next) {
console.log("---InSideFunction---");
try {
var workbook = new Excel.Workbook();
var worksheet = workbook.addWorksheet();
worksheet.columns = [
{ header: "Id", key: "id", width: 10 },
{ header: "Name", key: "name", width: 32 },
{ header: "D.O.B.", key: "DOB", width: 10 }
];
worksheet.addRow({ id: 1, name: "John Doe", DOB: new Date(1970, 1, 1) });
worksheet.addRow({ id: 2, name: "Jane Doe", DOB: new Date(1965, 1, 7) });
workbook.xlsx
.writeFile("newSaveeee.xlsx")
.then(response => {
console.log("file is written");
console.log(path.join(__dirname, "../newSaveeee.xlsx"));
res.sendFile(path.join(__dirname, "../newSaveeee.xlsx"));
})
.catch(err => {
console.log(err);
});
} catch (err) {
console.log("OOOOOOO this is the error: " + err);
}
});
module.exports = router;

Answer 2

req and res are not associated with 'exceljs'.