fixed some ids lul

Facebook Hidden Reactions.user.js

// ==UserScript==
// @name Facebook Hidden Reactions
// @description Adds new hidden reactions
// @match *://*.facebook.com/*
// @version 1.1
// @grant none
// @run-at document-body
// ==/UserScript==
//
// Original code: https://p0358.net/facebook_reactions.user.js
let hookFacebookReactionsCounter = 0;
function hookFacebookReactions() { 
  const modulesToHook = ['UFICentralUpdates', 'UFIFeedbackTargets'];
  const updateFeedbackEvent = 'update-feedback'; 
  const defaultReactionsCount = 6;
  const newReactions = [{name: "fire", id: 14 } , 
                        {name: "plane", id: 15}];
  if(window.requireLazy) {
    window.requireLazy(modulesToHook,
      (UFICentralUpdates, UFIFeedbackTargets) => {
        // listen for the event that updates the object used by Reactions
        UFICentralUpdates.subscribe(updateFeedbackEvent, onUpdateFeedback);
        // listen when a 'FeedbackTarget' is updated so we can modify its data
        function onUpdateFeedback(eventName, feedbackObj) {
          var supportedReactions = feedbackObj.feedbacktarget.supportedreactions;
          // to prevent an infinite callback loop, only send an update if the Reactions haven't been modified yet
          if(supportedReactions.length === defaultReactionsCount) {
              for(let reaction of newReactions.reverse()){
                  supportedReactions.push(reaction.id);
              }
            feedbackObj.feedbacktarget.supportedreactions = supportedReactions; // reassign the supportedreactions
            UFICentralUpdates.inform(updateFeedbackEvent, feedbackObj); // update the 'FeedbackTarget' ???? PROFIT!!
          }
        }
      }
    );
    let cssText = ``; 
    for(let reaction of newReactions){
        // make up css style
        cssText += `div[data-reaction='${reaction.id}'] div._4sm1:after { content: ' ${reaction.name}'; }`;
    }
    //hook style
    let hookScript = document.createElement("style");
    hookScript.type = "text/css";
    hookScript.textContent = cssText;
    (document.head || document.body || document.documentElement).appendChild(hookScript);
  } else {
    console.log('Failed to inject Facebook Reactions hook.');
    hookFacebookReactionsCounter++;
    if (hookFacebookReactionsCounter < 30) setTimeout(hookFacebookReactions, 50);
  }
};

hookFacebookReactions();