How to push to an array value in proxy object in Javascript

Question

in normal object we can push to normal array value like obj.l =[]; obj.l.push("test")

Example.

var prxy =  new Proxy({} , {
get(target, name){
    return target[name]
}, 
set(target,name, value){
    target[name] = value; 
    return true;
}
})

prxy.h = {test : "test"}
>> {test: "test"}
prxy.h
>>{test: "test"}
prxy.h.push("test")
>>VM2724:1 Uncaught TypeError: prxy.h.push is not a function
at <anonymous>:1:8

push() is for arrays, not objects, so use the right data structure. stackoverflow.com/questions/8925820/… — Seifeddine Besbes
– Seifeddine Besbes, Commented Sep 26, 2017 at 13:13
@Durga — Arrays are objects too. The significance is that Proxy is not an array. — Quentin
– Quentin, Commented Sep 26, 2017 at 13:13

Lars Peterson · Accepted Answer · 2021-04-07 04:27:48Z

5

You can't use array methods on an object. And there really wouldn't be a point here anyway. There's no reason to use push() when you can just append a value to an object:

prxy.h.someKey = someValue;

Or using a dynamic key:

var dynamicKey = "car";
prxy.h[dynamicKey] = someValue;

edited Apr 7, 2021 at 4:27

answered Sep 26, 2017 at 13:13

Lars Peterson

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