Hello Stack Overflow Users/Developers,
I'm trying to take JSON from a file using the fs module, add a key to the variable that holds the JSON, and then overwrite the file. Basically making a Data Saving System with fs. I've tried many different ways but I came across an error when trying this.
SyntaxError: Unexpected End of JSON input
var UserTable = JSON.stringify(require('./data/Data'))
UserTable[`User_${id[key]}`] = value;
setTimeout(() => {
console.log(UserTable);
}, 1000);
fs.writeFileSync(__dirname + '/data/Data.json', UserTable);
Your are updating json after JSON.stringfy().
Before abc.json file
{
name : "Tom"
}
const appjson = require("./abc.json");
var fs = require('fs');
id = [1, 2, 3, 4] // json or array
key = 3 //index or key
value = "some_value" // data to set
appjson[`User_${id[key]}`] = value;
fs.writeFileSync(__dirname + '/abc.json', JSON.stringify(appjson));
After abc.json
{
"name": "Tom",
"User_4": "some_value"
}