JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdn.jsdelivr.net/filesaver.js/0.1/FileSaver.min.js"></script>

JavaScript

var myjson= "{a:3, b:4}";
var blob = new Blob([myjson], {type: "application/json"});

var saveAs = window.saveAs;
saveAs(blob, "my_outfile.json");