freeCodeCamp/guide/chinese/javascript/standard-objects/object/object-freeze/index.md

title	localeTitle
Object Freeze	对象冻结

对象冻结

Object.freeze()方法冻结了一个对象。冻结的对象会_阻止您_ ：

• 添加新属性
• 从中删除现有的特性
• 更改其现有属性的可枚举性，可配置性或可写性

句法

Object.freeze(obj) 

参数

obj

• 要冻结的对象。

返回

冻结的物体。

重要的提示

尝试添加，删除或修改冻结对象的属性将导致失败。此失败将是静默或抛出TypeError （如果启用了严格模式）。另外， Object.freeze()是一个浅操作。这意味着冻结对象的嵌套对象是可修改的。

例

// Create your object 
 let person = { 
  name: 'Johnny', 
  age: 23, 
  guild: 'Army of Darkness', 
  hobbies: ['music', 'gaming', 'rock climbing'] 
 } 
 
 // Modify your object 
 person.name = 'John' 
 person.age = 24 
 person.hobbies.splice(1,1) 
 delete person.guild 
 
 // Verify your object has been modified 
 console.log(person) // { name: 'John', age: 24, hobbies: ['music', 'rock climbing'] 
 
 // Freeze your object 
 Object.freeze(person) 
 
 // Verify that your object can no longer be modified 
 person.name = 'Johnny' // fails silently 
 person.age = 23 // fails silently 
 console.log(person) // { name: 'John', age: 24, hobbies: ['music', 'rock climbing'] 
 
 // The freeze is "shallow" and nested objects (including arrays) can still be modified 
 person.hobbies.push('basketball') 
 consol.log(person.hobbies) // ['music', 'rock climbing', 'basketball'] 

更多信息：

MDN文档