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                Proxy 文檔:https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Proxy Reflect 文檔:https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Reflect **** * 先通過 Proxy 代理對象攔截目標對象的任意屬性的任意(13種)操作,包括屬性值的讀寫、屬性的添加,、屬性的刪除等。 * 然后通過 Reflect 反射對象,動態地對被代理對象的相應屬性進行特定的操作。 ```html <script type="text/javascript"> //1. 目標對象(被代理對象) const user = { name: '張三', wife: { name: '小櫻' } } //2. 代理對象 const proxyUser = new Proxy(user, { //獲取目標對象的屬性值 get(target, prop) { return Reflect.get(target, prop) }, //修改或新增目標對象的屬性 set(target, prop, val) { return Reflect.set(target, prop, val) }, //刪除目標對象屬性 deleteProperty(target, prop) { return Reflect.deleteProperty(target, prop) } }) //3. 通過代理對象獲取屬性 console.log(proxyUser.name) //張三 //4. 通過代理對象更改屬性 proxyUser.name = '王五' console.log(user) //{name: '王五', wife: {…}} //5. 通過代理對象添加新屬性 proxyUser.gender = '男' console.log(user) //{name: '王五', wife: {…}, gender: '男'} //6. 通過代理對象刪除屬性 delete proxyUser.gender console.log(user) //{name: '王五', wife: {…}} </script> ```
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