node's watchFile( ) questions

Question

node's watchFile( ) questions

Q1. I have the following code. But when I change and save config1.json, it outputs the Initial config: , does not output the new config. What am I doing wrong here?

var fs = require("fs");
console.log("Started");
var config = JSON.parse(fs.readFileSync("./files/config1.json"));
console.log("Initial config: ", config);

fs.watchFile("./files/config1.json", function(current, previous){
    console.log("Config changed");
    config = JSON.parse(fs.readFileSync("./files/config1.json"));
    console.log("New config file: ", config);
});

The above outputs the following.

node watch.js
Started
Initial config:  { username: 'ollie',
  api_key: 'parsley',
  name: 'Ollie Parsley',
  version: 112 }

Q2. Since it is watching in the terminal, I am not able to get out or quit it. How can I quit it from the above code in the terminal?

Thanks in advance.

node.js

Answer 1

Q1. I found that if I use curr and prev, it works.

var fs = require("fs");
console.log("Started");
var config = JSON.parse(fs.readFileSync("./files/config1.json"));
console.log("Initial config: ", config);

fs.watchFile("./files/config1.json", function(curr, prev){
    console.log("Config changed");
    config = JSON.parse(fs.readFileSync("./files/config1.json"));
    console.log("New config file: ", config);
});

Q2. Control+c will stop the running code.