JSFiddle - React, Tailwind, and code Playground

JavaScript

function downloadFile(conteudo, filename) {
    var ancora = document.createElement('a');
    ancora.href = 'data:application/octet-stream;charset=utf-8,' + conteudo;
    ancora.download = filename;
    ancora.click();
}

downloadFile(JSON.stringify({foo: 1, bar: false}), "textarea.json");