JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://raw.githubusercontent.com/eligrey/FileSaver.js/master/FileSaver.js"></script>

aaa
<button id="b" onclick="save_file()">export to CSV</button>
bbb

JavaScript

function save_file()
{
	var blob = new Blob(["Hello, world!"], {type: "text/plain;charset=utf-8"});
	saveAs(blob, "hello world.txt");
}