BritPolNews.user.js

// ==UserScript==
// @name        BritPolNews
// @namespace   britpolnews
// @description Automatically includes recent relevant news in the OP of Brit/pol/.
// @include     https://boards.4chan.org/pol/thread/*
// @version     1
// @grant       GM_xmlhttpRequest
//
// Save in file with extension ".user.js" then drag the file in to your open browser to install.
//
// ==/UserScript==

// Ensure it only runs once.
if (window.top != window.self)
  return;

var visible = false;
var bits;

GM_xmlhttpRequest({
  method: "GET",
  url: "https://farage.neocities.org/",
  onload: function(response) {
    var parser, doc, headlines, links, time, oppost, showhidediv, showhidebutton, spacer;

    // Setup
    parser = new DOMParser();
    doc = parser.parseFromString(response.responseText, "text/html");
    headlines = doc.getElementsByClassName("quote");
    links = doc.getElementsByTagName("a");
    oppost = document.getElementsByClassName("postMessage")[0];

    // Create button
    showhidediv = document.createElement("div");
    showhidediv.style.textAlign = "center";
    showhidediv.style.marginTop = "10px";
    showhidediv.innerHTML = "[<a id='showhide' style='cursor: pointer;'>Show Live Headlines</a>]";
    oppost.appendChild(showhidediv);
    showhidebutton = document.getElementById("showhide");

    // Add event listener
    showhidebutton.addEventListener("click", function() {
      visible = !visible;
      if (visible) {
        this.innerHTML = "Hide Live Headlines";
        for (var i = 0; i < bits.length; i++)
          bits[i].style.display = "inline";
      } else {
        this.innerHTML = "Show Live Headlines";
        for (var i = 0; i < bits.length; i++)
          bits[i].style.display = "none";
      }
    });

    // Add top spacer
    spacer = document.createElement("hr");
    oppost.appendChild(spacer);

    // Create timestamp bit
    time = document.createElement("span");
    time.innerHTML = doc.getElementsByTagName("small")[0].innerHTML;
    time.innerHTML = "Headlines " + time.innerHTML.substring(4, time.innerHTML.length);
    time.style.fontStyle = "italic";
    time.className += " showhidebit";

    // Append bits
    for (var i = 0; i < headlines.length; i++) {
      headlines[i].className += " showhidebit";
      links[i].className += " showhidebit";
      oppost.appendChild(headlines[i]).appendChild(document.createElement("br")).className += " showhidebit";
      oppost.appendChild(links[i]).appendChild(document.createElement("br")).className += " showhidebit";
      oppost.appendChild(document.createElement("br")).className += " showhidebit";
      oppost.appendChild(time);
    }

    // Get all elements with class "showhidebit". Kind of a work-around because I'm shit and JS is for gayers.
    bits = document.getElementsByClassName("showhidebit");

    // Hide all bits by default
    for (var i = 0; i < bits.length; i++)
      bits[i].style.display = "none";
  }
});