Untitled

<!DOCTYPE html>
<html>
    <body>

<form onsubmit="addToJSON();">
First name:<br>
<input type="text" id="place">
<br>
Last name:<br>
<input type="text" id="username">
<br><br>
<input type="submit" value="Submit">
</form>
<script src="data.json"></script>
<script>
function addToJSON(){
    alert("inside JS");
    var x = document.getElementById('place').value;
    var y = document.getElementById('username').value;
    var obj = {
    place: x,
    username: y
};
localStorage.setItem("info",JSON.stringify(obj));
}
</script>

</body>
</html>