Overriding JSON.stringify causing error

Question

I just created a function that return JSON.stringify like this:

JSON.stringify = function (item, replacer, space) {
     return JSON.stringify(item, replacer, space);
}

and it causes all these errors on angularjs: click here

The reason I want to override the function is because I want to create a property in objects that tells the JSON to ignore a field, like this:

JSON.stringify = function (item, replacer, space) {
    if (angular.isObject(item)) {
        var newItem = angular.copy(item);
        var ignores = item.jsonIgnore || [];

        ignores.forEach(prop => {
            delete newItem[prop];
        });

        return JSON.stringify(newItem, replacer, space);
    }

    return JSON.stringify(item, replacer, space);
}

uhmm, I thought that it was calling the original JSON.stringify — Eduardo Rosostolato, Feb 11 '18 at 13:47
Thanks dude, I resolved creating a local `var originalStringify = JSON.stringify;` and then calling `return originalStringify(item, replacer, space);` — Eduardo Rosostolato, Feb 11 '18 at 13:49
@EduardoRosostolato You should post that [as an answer](https://stackoverflow.com/help/self-answer) — Bergi, Feb 11 '18 at 13:59

Pedram · Answer 1 · 2018-02-11T14:03:38.517

0

It is a recursive function without any end condition. Either you can solve the problem with creating a local function:

var localStringify = function (item, replacer, space) {
    ...
}

Or override the original function considering the explanation given in this thread.

edited Feb 11 '18 at 14:03

answered Feb 11 '18 at 13:55

Pedram

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score 0 · Accepted Answer · answered Feb 11 '18 at 14:18

Thanks all, I resolved creating a local variable with the original function

var originalStringify = JSON.stringify;

and then calling on my custom function

return originalStringify(item, replacer, space);

Now my full Json ignore override function is like this:

// JSON ignore
var original = JSON.stringify;

JSON.stringify = function (item, replacer, space) {
    if (angular.isObject(item)) {
        var newItem = angular.copy(item);
        var ignores = item.jsonIgnore || [];

        ignores.forEach(prop => {
            delete newItem[prop];
            delete newItem.jsonIgnore;
        });

        return original(newItem, replacer, space);
    }

    return original(item, replacer, space);
}

Overriding JSON.stringify causing error

2 Answers2

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