A simple implementation of an Instagram bot that likes photos

instalike.js

// Copyright (c) 2020 Edwin Pratt
//
// The author of this file is not responsible for any problems this script may cause.
// This file was created as toy while learning JavaScript.
//
// ------------------------------
//
// I was always interested in bots and how they work. So I created this simple bot that will like photos on Instagram.
//
// To use this script, go to https://instagram.com and login.
// Search for a tag like #family or go to a user's profile.
// Tap on the first photo/video which you see.
// Open the Developer Tools (Ctrl + Shift + I on Windows).
// Go to the JavaScript Console.
// Paste the code and press enter.
// When you're ready to start the bot, type start() and press enter.
// To stop the bot, type stop() and press enter.
//
// There is a variable called interval. This variable is used to set the interval in between each click
// On the like button.
// By default, it is on 5000 milliseconds (or 5 seconds). Adjust the value as needed if you have a slow connection.
// It is recommended that you don't go below 5000. 
//
// ---------- COPY EVERYTHING BELOW THIS LINE! ----------- //


// Set the interval for the timer.
// If you have a slow connection, increase this value to 10000 (Or 10 seconds).
// Otherwise, don't change it.
const interval = 5000;
// Start the bot.
const start = () => {
    // This variable will keep track with the number of images that have been liked.
    let count = 0;
    
    // Do not run the bot if it is already running.
    if (typeof window.idForBot != 'undefined') {
        console.error('The bot is already running. Run `stop()` to stop the bot.');
        return;
    }
    
    window.idForBot = setInterval(() => {
        try {
            // Select the DOM elements.
            const arrow = document.querySelector('.coreSpriteRightPaginationArrow');
            const heart = document.querySelector('svg[aria-label="Like"]').parentNode.parentNode.parentNode; // IG updated HTML
            
            // If the heart icon exists, click it.
            if (typeof heart != 'undefined' && heart != null) {
                heart.parentNode.click();
                count++;
            } else {
                throw 'Can not find the heart icon';
            }
            
            // If there is an arrow, click it and output the number of images that have been liked.
            // Otherwise, inform the user that he/she needs to tap on an image first.
            if (typeof arrow != 'undefined' && arrow != null) {
                arrow.click();
                console.log(`You liked ${count} photos!`);
            } else {
                throw 'Please tap on an image in order to run the bot...';
            }
        } catch (error) {
            console.error(error);
        }
    }, interval);
};

// Stop the bot.
const stop = () => {
    if (typeof window.idForBot != 'undefined') {
        clearInterval(window.idForBot);
        window.idForBot = undefined;
    } else {
        console.error('The bot is not running. Run `start()` to start the bot.');
    }
};