<!DOCTYPE html>
<html lang="en-US">
<body>
<script>
"use strict";
var bike = {
company:"honda",
model:"CBR 1000RR",
color:"Red"
};
Object.defineProperty(bike, "company", {writable:false});
bike.color="Black";
document.write(bike.color);
// Error occur, check your console
bike.company="Harley Davidson";
document.write(bike.company);
</script> </body>
</html>