Export Heroku env

heroku.env.js

// This script lets you export all heroku config vars
// 1) Go to your app settings and reveal config vars
// 2) Open the console and run this code:
// BONUS: You can add this script as a bookmark.

function download(filename, text) {
  var element = document.createElement('a');
  element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
  element.setAttribute('download', filename);

  element.style.display = 'none';
  document.body.appendChild(element);

  element.click();

  document.body.removeChild(element);
}

var env = ''
Array.from(document.getElementsByTagName('tbody')[0].children).map(item => env += item.children[0].children[0].value + '=' + item.children[1].children[0].value + '\n')
download('env.txt', env);

Minified:

function download(e,t){var n=document.createElement("a");n.setAttribute("href","data:text/plain;charset=utf-8,"+encodeURIComponent(t)),n.setAttribute("download",e),n.style.display="none",document.body.appendChild(n),n.click(),document.body.removeChild(n)}var env="";Array.from(document.getElementsByTagName("tbody")[0].children).map(e=>env+=e.children[0].children[0].value+"="+e.children[1].children[0].value+"\n"),download("env.txt",env);