​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JavaScript 对象是易变的</h1>
​
<p>对对象副本的任何更改也将更改原始对象。</p>
​
<p id="demo"></p>
​
<script>
var person = {firstName:"Bill", lastName:"Gates", age:62, eyeColor:"blue"}
​
var x = person;
x.age = 10;
​
document.getElementById("demo").innerHTML =
person.firstName + " is " + person.age + " years old.";
</script>
​
</body>
</html>
​