Auto follow users on Instagram

instagram-auto-follow.js

/**
 * 
 * Auto follow users on Instagram Web
 * 
 * Tired of following users one by one. Follow below steps to automate it.
 * 1. Go to some user's profile i.e. https://www.instagram.com/spacex and click on followers, popup with user list will appear.
 * 2. Open console ( press F12 in chrome ) and paste all the code below.
 * 3. Wait while all the users are being followed.
 * 
 * @author : Hardik Sondagar <hardikmsondagar@gmail.com>
 * 
 */
var follow_class = 'L3NKy';
var follow_list_cast = 'isgrP';
var follow_duration = 20000
var follow_list_refresh_duration = 10000

function follow(user) {
  user.click();
}

var follow_interval = setInterval(
  function() {
    var users = document.getElementsByClassName(follow_class);
    var user_to_follow = null;
    var i;
    for (i=0; i<users.length; i++) {
      if (users[i].innerText == 'Follow') {
          user_to_follow = users[i];
          break;
      }
    }
    if (user_to_follow) {
      console.log(user_to_follow.innerText);
      follow(user_to_follow);
    }
  },
  follow_duration
);


var refresh_list_interval = setInterval(
  function() {
    follow_list = document.getElementsByClassName(follow_list_cast);
    follow_list[0].scrollTop = follow_list[0].scrollHeight;
  },
  follow_list_refresh_duration
);