All Questions
35
questions
0
votes
1
answer
81
views
Debounce "setting" of values in proxy trap without delay/timeout
I try to understand how i can debounce a "set" trap in javascript proxy.
function debounce(func, wait, immediate = false) {
let timeout = null;
return function(...args) {
let ...
- 3,836
-3
votes
1
answer
175
views
How can I use proxy with spread operator or object.assign?
I need to have methods and store bound to 'this' in my callback function, but when I use the spread operator it doesn't work.
The reason for this as far as I know is that the spread operator returns a ...
- 433
1
vote
1
answer
279
views
why are target and receiver not the same in this javascript proxy?
I am working with JavaScript Proxy and do not understand why the target and the receiver are different in both the get() and set() traps. They appear to be the same (based on console logging). The ...
- 5,198
1
vote
1
answer
119
views
Can I extend default javascript function prototype to let some code been executed on every function call?
Lets say there are functions
function a(someparams){
console.log('a called')
}
function b(){
console.log('b called')
}
...
const c (someParam) => { console.log('c called')}
I want to extend ...
- 13
0
votes
0
answers
50
views
In Javascript, is it possible to proxy 'this' within a constructor, without editing the constructor
Imagine I have the following Javascript class:
class C {
constructor() {
this.foo = "bar"
}
}
I have proxied C so I can intercept construction of C:
const handler = {
construct(...
- 105
0
votes
1
answer
271
views
Proxy trap for a part of functions
I implemented a proxy handler to intercept all functions in a class.
class SBFinder {
foo1({ name, id }) {
console.log(name + id);
}
foo2({ name, id }) {
console.log(id + name);
}
}
...
- 1,013
0
votes
1
answer
121
views
How do I intercept sort function within a JS proxy with a function?
My previous related question: How do I intercept sort function within a JS proxy?
Given the proxy:
function sort(customSort) {
/* Write logs */
console.log("Intercepted sort")
return ...
- 780
3
votes
1
answer
263
views
How do I intercept sort function within a JS proxy?
I know how to intercept get`set` and such within a proxy using the following code:
function get( target, prop, receiver ) {
console.log("Intercepted get")
return Reflect.get( target, ...
- 780
0
votes
0
answers
153
views
different behavior es6 Proxy on NodeJs and Web when return in class constructor that extends
import * as Parse from 'parse';
import { Object as ParseObject } from 'parse';
export interface IItem {
num: number;
}
export class Item extends ParseObject<IItem> implements IItem {
num = 1;
...
- 118
6
votes
1
answer
578
views
Using ES6 Proxy to lazily load resources
I am building something like an ActiveRecord class for documents stored in MongoDB (akin to Mongoose). I have two goals:
Intercept all property setters on a document using a Proxy, and automatically ...
- 551
1
vote
1
answer
177
views
Accesing method startsWith throw error when calling console.log() in proxy
I am learning about ES6 proxies, for this purpose I follow the guide on javascript.info, the following example, avoid reading, deleting, adding a new property and listing properties if the property ...
- 4,932
0
votes
0
answers
42
views
Is this a bug in Node Proxy objects (v12.6.0)?
One can wrap a class in a proxy object.
Proxy objects allow us to trap calls to the constructor.
One can extend the proxy-wrapped class.
In the browser (chrome 73.0.3683.75), calling the subclass ...
- 77
7
votes
3
answers
6k
views
Intercept method calls in javascript
What's the equivalent of the __call magic method from PHP ?
I was under the impression that Proxy can do this, but it can't.
class MyClass{
constructor(){
return new Proxy(this, {
apply: ...
- 67.5k
3
votes
2
answers
1k
views
Why is my function proxy not being called in Node?
I was using proxy get method fine. Then I tried using it on a function and quickly realized I needed to use the apply method. This simple example is not working. It never enters apply.
Node looks to ...
- 9,126
1
vote
0
answers
790
views
How should I change my code to chain generator function by using ES6 proxy?
I've been spending many hours for the last couple days to make my code work but I can't make it work!!
What I'm trying to accomplish is chaining generator functions like the below by using es6 proxy. ...
- 244