how to reverse json stringify code example

Example 1: json opposite of stringify

let s = '{"hello":"world"}';
let obj = JSON.parse(s);

Example 2: js reverse JSON.stringify

var str = '{"hello":"world"}';
try {
  var obj = JSON.parse(str); // this is how you parse a string into JSON 
  document.body.innerHTML += obj.hello;
} catch (ex) {
  console.error(ex);
}