stringify.js

// Works on simple data structures, did not test on more complex cases 
// defined here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify
const stringify = (jsobj) => {
  const typ = typeof(jsobj);
  if(typ==='string') return `"${jsobj}"`;
  if(typ==='number' || typ==='boolean') return `${jsobj}`;

  let [start, result, ending] = ['', '', ''];
  if(jsobj.length === undefined) {
    start = "{";
    result = Object.keys(jsobj).reduce((acc, k) => `${acc}"${k}":${stringify(jsobj[k])},`, '');
    ending = "}";
  } else {
    start = "[";
    result = jsobj.reduce( (acc, e) => `${acc}${stringify(e)},`, '');
    ending = "]";
  }
  return `${start}${result.slice(0,-1)}${ending}`; // slice removes last comma
};