JSON Stringify

<!DOCTYPE html>
<html>
<body>

<h2>Store and retrieve data from local storage.</h2>
<p id="demo"></p>

<script>
/* Storing data: */
const myObj = {name: "Ahmed", age: 31, city: "Cairo"};
const myJSON = JSON.stringify(myObj);
localStorage.setItem("testJSON", myJSON);

/* Retrieving data: */
let text = localStorage.getItem("testJSON");
let obj = JSON.parse(text);
document.getElementById("demo").innerHTML = obj.name;
</script>

</body>
</html>