ExportTo CSV Using Flexmonster.js

Thank you Tanya for the quick reply. But I have to use Flexmonster's ExportAPI feature Without showing Pivot Grid.
In order to achieve this I believe, I need to bind data first to the PivotContainer and then use ExportAPI. Is this possible to achieve this by keeping PivotContainer Grid(div) hidden.

Hi Tanya,
Here I am providing more details.
I added one button in HTML and Export functionality on click event and kept div of Pivot Container hidden.
Please find below HTML and Javascript code for the same.
It's working but columns are not appearing in exported CSV file. How to make these columns visible in CSV file.Additionally I attached CSV file
 
HTML
<script src="https://cdn.flexmonster.com/flexmonster.js"></script>
<div id="pivot-container" style="display: none;"></div>
<button onclick="ExportCSV()">Export CSV</button>
JS
var pivot = new Flexmonster({
container: "#pivot-container",
componentFolder: "https://cdn.flexmonster.com/",
width: "100%",
height: 430,
toolbar: true,
report: {
dataSource: {
filename: "data/sales.csv",
},
slice: {
rows: [{
uniqueName: "Month"
}, {
uniqueName: "[Measures]"
}],
columns: [{
uniqueName: "Category",
levelName: "Product Name",
filter: {
members: [
"category.[condiments].[bbq sauce]",
"category.[breakfast cereals].[corn flakes]",
"category.[confectionery]",
"category.[bakery].[chocolate biscuits]",
"category.[fruit preserves].[apple jam]",
"category.[bakery].[apple cake]",
"category.[soups].[tomato soup]"
]
}
}],
measures: [{
"uniqueName": "Revenue",
"aggregation": "sum",
"format": "2sfou03a"
}]
},
conditions: [{
formula: "#value < 2500",
measure: "Revenue",
format: {
backgroundColor: "#df3800",
color: "#FFFFFF"
},
isTotal: false
},
{
formula: "#value > 20000",
measure: "Revenue",
format: {
backgroundColor: "#00A45A",
color: "#FFFFFF"
},
isTotal: false
}],
formats: [{
name: "2sfou03a",
thousandsSeparator: ",",
decimalSeparator: ".",
decimalPlaces: 2,
currencySymbol: "$",
currencySymbolAlign: "left",
nullValue: "",
textAlign: "right",
isPercent: false
}]
}
});
ExportCSV = function()
{
pivot.exportTo('csv');
}