Userscript to hide view of downvotes on discuit.net

discuit-hide-downvotes.user.js

// ==UserScript==
// @name         discuit-hide-downvotes
// @namespace    discuit-aw-userscripts
// @version      2024-04-11
// @description  Hide downvotes on Discuit
// @author       AuralWanderer
// @match        https://discuit.net/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=discuit.net
// @grant        none
// ==/UserScript==

"use strict";

// elements to hide: hover on posts in feed
// post page: green/red bar and its hover; hover on post badge
// comments: downvote element
// user feed: downvote count, post badge hover

function nodeSelect(root, selector, handler) {
  // check the node itself for matching the selector
  if (root.matches(selector)) {
    handler(root);
  }
  // check the subtree
  let subMatches = root.querySelectorAll(selector);
  for (let node of subMatches) {
    handler(node);
  }
}

function handlePostBadge(node) {
  const pat = /Upvotes: (\d+) • Downvotes: (\d+)/i;
  let matchResult = node.title.match(pat);
  node.innerHTML = matchResult[1];
  node.title = "Upvotes: " + matchResult[1] + " • Downvotes: 0";
}

function handleVoteBar(node) {
  node.querySelector(".votes-bar-down").style.width = "0%";
  const pat = /upvoted • (\d+ upvotes?)/i;
  let upvotes = node.title.match(pat)[1];
  node.title = "100% upvoted • " + upvotes + " • 0 downvotes";
}

function handlePostComment(node) {
  node.innerHTML = 0;
}

function handleUserFeedComment(node) {
  const pat = /\d+ upvotes?/i;
  let upvotes = node.innerHTML.match(pat)[0];
  node.innerHTML = upvotes + " • 0 downvotes";
}

function handleMobilePostPercent(node) {
  node.innerHTML = "100% Upvoted";
}

function observeDownvotes(mutations) {
  for (let mutation of mutations) {
    for (let node of mutation.addedNodes) {
      if (! (node instanceof HTMLElement)) continue;
      nodeSelect(node, "div.post-votes-no", handlePostBadge);
      nodeSelect(node, "div.post-card-votes-bar", handleVoteBar);
      nodeSelect(node, "div.post-comment-points.is-grayed", handlePostComment);
      nodeSelect(node, "div.comment-score", handleUserFeedComment);
      nodeSelect(node, "div.post-card-vote-percent", handleMobilePostPercent);
    }
  }
}

let observerInit = new MutationObserver(observeDownvotes);
observerInit.observe(document.querySelector("body"), {childList: true, subtree: true});