Proxies and Object Operations in Javascript

Proxies and Object Operations in Javascript

In this article, we’ll look at metaprogramming with JavaScript proxies.

In this article, we’ll look at metaprogramming with JavaScript proxies.

Wrapping Instances of Built-in Constructors

We can use proxies to wrap instances of built-in constructors.

For instance, we can write:

const target = new Date();
const handler = {};
const proxy = new Proxy(target, handler);

But if we write:

console.log(proxy.getDate());

We get ‘Uncaught TypeError: this is not a Date object.’ because we called getDate on the proxy instead of the original Date instance.

However, proxies can be wrapped transparently with arrays.

web-development programming javascript technology software-development

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