How to add object to json file?

Question

JavaScript

In general, I want to send

[
{
"id": 1
}
]

I tried to file ikuky.json through myJson.push, it doesn't work.

Answer 1

You need to overwrite the file
https://nodejs.org/api/fs.html
https://metanit.com/web/nodejs/2.8.php

const Json = require('./my.json');
const fs = require("fs");
Json.push({
    userId: 2,
    id: 2
});
fs.writeFileSync("my.json", JSON.stringify(Json))

Answer 2

If this is a file, then you must first read it, then convert the string to JSON, and only then work with it.

Answer 3

You need to parse the string, add the required value, and cast it back to JSON
Links:
JSON format, toJSON method