​x
 
<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript Object Properties</h2>
<p>Access a property with .property:</p>
​
<p id="demo"></p>
​
<script>
const person = {
  firstname: "John",
  lastname: "Doe",
  age: 50,
  eyecolor: "blue"
};
​
document.getElementById("demo").innerHTML = person.firstname + " is " + person.age + " years old.";
</script>
​
</body>
</html>