javascript json nodejs code example

Example 1: Working with JSON in Node.js

/*
    This code comes from Vincent Lab
    And it has a video version linked here: https://www.youtube.com/watch?v=dR--FnRoYh0
*/

// Import dependencies
const fs = require("fs");

// Load the config
const config = require("./config.json");

// Show the config
console.log(config);

// Modify the config
config.apiKey = "gj3j#4K321hIO"; // 2i3f2399g23y43q9o

// Saved the config
fs.writeFile("./config.json", JSON.stringify(config), function (err, file) {
    if (err) throw err;
    console.log("Saved!");
});

Example 2: javascript parse json

var jsonPerson = '{"first_name":"billy", "age":23}';
var personObject = JSON.parse(jsonPerson); //parse json string into JS object

Example 3: json parse returns object

var str = '[{"UserName":"xxx","Rolename":"yyy"}]'; // your response in a string
    var parsed = JSON.parse(str); // an *array* that contains the user
    var user = parsed[0];         // a simple user
    console.log(user.UserName);   // you'll get xxx
    console.log(user.Rolename);   // you'll get yyy

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