javascript - 将代理应用于对象(Applying proxy to an object)

Question

Hi, I am trying to transform an object into a proxy, without changing the reference to the object:(嗨，我正在尝试将一个对象转换为一个代理，而不更改对该对象的引用：)

Here is a simple class:(这是一个简单的类：) class Foo { constructor () { this.a = 'bar' } } const foo = new Foo() Here is my Proxy:(这是我的代理：) const proxy = new Proxy(foo, { get () { return 'proxy-bar' }, set () { // Don't do anything return true } }) Here is what a normal use of this proxy does:(这是此代理的常规用法：) console.log(foo.a) // bar console.log(proxy.a) // proxy-bar Now, I want to keep using foo , but with the capabilities of proxy .(现在，我想继续使用foo ，但要具有proxy的功能。) So I tried to use Object.assign which seems to work only for the getter, but not for the setter.(因此，我尝试使用Object.assign ，它似乎仅适用于getter，但不适用于setter。) Is their something I miss?(是我想念的吗？) Object.assign(foo, proxy) console.log(foo.a) // Getter works: proxy-bar foo.a = 'proxy-proxy-bar' console.log(foo.a) // Setter does not work: proxy-proxy-bar   ask by Hammerbot translate from so

Answer 1

You can apply the proxy in your constructor and return it :(您可以在构造函数中应用代理并将其返回：)

class Foo { constructor() { this.a = 'bar'; return new Proxy(this, { get() { return 'proxy-bar' }, set() { // Don't do anything return true } }); } } const foo = new Foo(); foo.a = 'proxy-proxy-bar'; console.log(foo.a); // proxy-bar