与展开运算符同理 也是浅拷贝 遇到对象,只拷贝引用
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
</body>
<script type="text/javascript">
const obj1 = {a: {b: 1}};
const obj2 = Object.assign({}, obj1);
// obj1.a.b = 2;
// obj2.a.b // 2
console.log(obj1 == obj2)
console.log(obj1.a == obj2.a)
</script>
</html>