angularjs csv download to local

There are two options

1) Send the csv from your server.

2) Data URIs. I think this is what you're asking for. Here is an example

/**
 * @param{string} content The contents of a file to download.
 * @param{string} fileName The name to save the file as on the user's computer.
 */
function(content, fileName) {
  var dataUrl = 'data:text/csv;utf-9,' + encodeURI(content);
  var link = document.createElement('a');
  angular.element(link)
    .attr('href', dataUrl)
    .attr('download', fileName) // Pretty much only works in chrome
  link.click();
}

You can try Alasql library, which can save data in CSV format one line:

 function myCtrl($scope) {
    $scope.filename = "mydata.csv";
    $scope.cities = [{city:"Odessa",population:100000},
                  {city:"Voronezh",population:201022},
                  {city: "Paris", population: 3000000}];

    $scope.saveCSV = function(filename, content) {
          alasql('SELECT city, population INTO CSV("'+$scope.filename+'",{headers:true}) FROM ?',
           [$scope.cities]);
    };
 };

See the full example code in jsFiddle.

In this example Alasql use SELECT operator to choose required fields from data array (AngularJS' creates $$hashKey field, which probably is not needed to users). If you do not use on these data simply export to CSV file with:

alasql('SELECT * INTO CSV('mydata.csv') FROM ?',[$scope.data]);