详解如何在Javascript中使用Object.freeze()

const objectExample = {
 prop1: 20,
 prop2: "羊先生"
};

// 默认情况下，我们可以根据需要修改对象的属性
objectExample.prop1 = 100;
console.log(objectExample.prop1)

// 冻结对象
Object.freeze(objectExample);

objectExample.prop2 = "Alice" // 如果在严格模式会抛出失败，在非严格模式下只会抛出异常

console.log(objectExample.prop2);

"use strict";

const theObject = {
 x: 1,
 z: 2,
 y: {
  a: "Hello",
  b: "羊先生"
 }
}

Object.freeze(theObject);

theObject.x = 100
console.log(theObject.x);

theObject.y.a = 'vipbic';
console.log(theObject.y.a);

const theObject = {
 x: 1,
 z: 2,
 y: {
  a: "Hello",
  b: "羊先生"
 }
}

const deepFreeze = (obj) => {

 const propNames = Object.getOwnPropertyNames(obj)

 for (const name of propNames) {
  const value = obj[name];

  if (value && typeof value === "object") { 
   deepFreeze(value);
  }
 }

 return Object.freeze(obj);
}

deepFreeze(theObject);
theObject.y.a = 100;
console.log(theObject.y.a );

<h4 v-for="(item,idx) in items" :key="idx">{{ item.text }}</h4>

data() {
  let data = Object.freeze([{text:'羊先生'},{text:'ipbic'}])
  return {
    msg: '',
    items:data
  }
},
mounted() {

  this.items[0].text = '分享快乐'; // 界面不会更新

  this.items = [{ text: 'itnavs' },{ text: '分享快乐' }]; // 界面会更新

  this.items = Object.freeze([{ text: 'itnavs' },{ text: '分享快乐' }]); // 界面会更新
},