class-proxy

The Class Proxy is used to define custom behavior for fundamental operations (e.g. property lookup, assignment, enumeration, function invocation, etc).

npm install class-proxy

api

• MDN: Proxy
• index.d.ts

demo

1import createClassProxy from 'class-proxy';
2import { createClassProxy } from 'class-proxy';
3
4var createClassProxy = require("class-proxy/node");

1import { implementation as URLImpl } from 'whatwg-url/lib/URL-impl';
2
3let URLImplProxy2 = createClassProxy(URLImpl, {
4	get(target, name)
5	{
6		return target[name];
7	},
8	set(target, prop, value, receiver)
9	{
10		if (prop == '_query')
11		{
12			value._url = target;
13
14			console.log(value);
15		}
16
17		target[prop] = value;
18		return true;
19	},
20	ownKeys(target): string[]
21	{
22		return [
23			'href',
24			'origin',
25			'protocol',
26			'username',
27			'password',
28			'host',
29			'hostname',
30			'port',
31			'pathname',
32			'search',
33			'hash',
34			'searchParams',
35		];
36	},
37	getOwnPropertyDescriptor(target, prop)
38	{
39		return {
40			value: target[prop],
41			enumerable: this.ownKeys(target).includes(prop),
42			configurable: true,
43		};
44	},
45	construct(target, args)
46	{
47		if (typeof args[0] == 'string')
48		{
49			return new target([args[0]]);
50		}
51
52		return new target(...args);
53	}
54});