I have an object:
var obj = {
name: "Sarah",
age: "25",
id: "[3]"
}
and I am looking to add it to the existing list in "people.json":
[
{
"name": "John",
"age": "30",
"id": [0]
},
{
"name": "Emma",
"age": "28",
"id": [1]
}
]
Any suggestions on how I can achieve this? Thank you!
When working with Node.js, the following steps can help you tackle your programming questions.
Firstly, you'll need to read and write a .json file using the code snippet below:
const fs = require("fs");
let usersjson = fs.readFileSync("users.json","utf-8");
Next, you'll want to transform a json string into a JavaScript array like so:
let users = JSON.parse(usersjson);
After that, you can append an object to an array using the following line of code:
users.push(obj);
To transform the updated array back into a json string, use this piece of code:
usersjson = JSON.stringify(users);
Finally, don't forget to save the modified json file by executing the following command:
fs.writeFileSync("users.json",usersjson,"utf-8");
If your script is executing in the browser and users.json serves as an output file, chances are you can retrieve its contents easily.
Utilize the push() method.
Be mindful of the missing commas within your objects.
var obj = {
username: "James",
surname: "Brandon",
id: "[2]"
};
var users = [
{
"username": "Andy",
"surname": "Thompson",
"id": [0]
},
{
"username": "Moe",
"surname": "Brown",
"id": [1]
}
];
users.push(obj);
console.log( JSON.stringify(users) );With the updated array of objects in hand, consider uploading it to the server (refer to this question) or providing a download option for the user (see this other question).
It's worth noting that modifying a file on the server directly from the client side is not feasible. Similarly, saving files directly to the client's filesystem is not achievable.
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