How to write sharepoint list items to text file using javascript/jquery?

var siteUrl = 'http://peakfinders/';

function retrieveListItems() {

var clientContext = new SP.ClientContext(siteUrl);

var oList = clientContext.get_web().get_lists().getByTitle('Employee');

var camlQuery = new SP.CamlQuery();

camlQuery.set_viewXml('<View><Query><Where><Geq><FieldRef Name=\'ID\'/>' + 

    '<Value Type=\'Number\'>1</Value></Geq></Where></Query><RowLimit>10</RowLimit></View>');

this.collListItem = oList.getItems(camlQuery);

clientContext.load(collListItem);

clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));        

}

function onQuerySucceeded(sender, args) {

var listItemInfo = '';

var listItemEnumerator = collListItem.getEnumerator();

while (listItemEnumerator.moveNext()) {

    var oListItem = listItemEnumerator.get_current();

    listItemInfo += '\nID: ' + oListItem.get_id() + 

        '\nTitle: ' + oListItem.get_item('Title') + 

        '\nBody: ' + oListItem.get_item('Body');

}

alert(listItemInfo.toString());

}

function onQueryFailed(sender, args) {

alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());

}

HTML:

 function exportToCsv() {

        var myCsv = "Col1,Col2,Col3\nval1,val2,val3";

        window.open('data:text/csv;charset=utf-8,' + escape(myCsv));

    }