Download any javascript object as json file

downloadDataAsJSON.js

var data = {test: 'test'};
var dataUri = 'data:application/json;charset=utf-8,'+ encodeURIComponent(JSON.stringify(data));
var link = document.createElement("a");
link.download = 'export.json';
link.href = dataUri;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);