Download javascript Object as JSON

downlaodAsJson.js

function downloadAsJson(exportObj, exportName){
  var dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(exportObj));
  var downloadAnchorNode = document.createElement('a');
  downloadAnchorNode.setAttribute("href",     dataStr);
  downloadAnchorNode.setAttribute("download", exportName + ".json");
  document.body.appendChild(downloadAnchorNode); // required for firefox
  downloadAnchorNode.click();
  downloadAnchorNode.remove();
}