GitHub comment thread bookmarklets

1 Expand All Comments.js

javascript:(function() { document.querySelectorAll(".outdated-comment").forEach(function (node) {
  node.classList.add("open");
}) }());

2 Expand All My Comments.js

// In the usual, simple case:
javascript:(function(){ document.querySelectorAll(".js-comment .author").forEach(function (node) {
  if(node.textContent === "<YOUR USERNAME HERE>") {
    for (var parent = node.parentNode; parent; parent = parent.parentNode) {
      if (parent.classList && parent.classList.contains("outdated-comment")) { parent.classList.add("open"); break; }
    }
  }
}) }());

// Or in my case I have two different usernames for GitHub vs. internal GH:
javascript:(function(){ document.querySelectorAll(".js-comment .author").forEach(function (node) {
  if(node.textContent === "pflynn" || node.textContent === "peterflynn") {
    for (var parent = node.parentNode; parent; parent = parent.parentNode) {
      if (parent.classList && parent.classList.contains("outdated-comment")) { parent.classList.add("open"); break; }
    }
  }
}) }());

3 Highlight & Expand All Comments Updated since... .js

javascript:(function(){
  var start=new Date(prompt("Enter Date/Time", new Date()));
  document.querySelectorAll(".js-comment relative-time").forEach(function (node) {
    function closest(node, className) {
      for (var parent = node.parentNode; parent; parent = parent.parentNode) {
        if (parent.classList && parent.classList.contains(className)) return parent;
      }
    }
    var border=closest(node, "js-comment");
    if (new Date(node.getAttribute("datetime")) >= start) {
      border.style.border = "1px solid red";
      var container = closest(border, "outdated-comment");
      if (container) { container.classList.add("open"); }
    } else {
      border.style.border = "";
    }
  });
}());

4 Go to Blame in Parent Commit.js

javascript:(function(){
function closest(node, className) {
  for (var parent = node.parentNode; parent; parent = parent.parentNode) {
    if (parent.classList && parent.classList.contains(className)) return parent;
  }
}

var selectionNode = document.getSelection().anchorNode;
if (!selectionNode) {
    alert("Select text in the file to go to parent blame for that file");
    return;
}
var fileBlock = closest(selectionNode, "file");
var fileRelPath = fileBlock.getElementsByClassName("file-header")[0].dataset.path;
var parentSHABlock = document.querySelectorAll(".commit-meta .sha-block")[0];
var parentSHANodes = parentSHABlock.querySelectorAll(".sha");
if (parentSHANodes.length > 1) {
    alert("Commit has two parents - unsure which to use");
    return;
}
var commitURL = parentSHANodes[0].href;
var url = commitURL.replace("/commit/", "/blame/") + "/" + fileRelPath;

/* Get line number */
var codeCell = closest(selectionNode, "blob-code");
var lineNumCell = codeCell.previousElementSibling;
var lineNum = lineNumCell.dataset.lineNumber;
url += "#L" + lineNum;

/* Navigate to new page */
window.location.href = url;
}());

Expand all Load Diff.js

javascript:(function() {
  loadDiffClassSelector = "text-bold f4 mb-3 js-button-text";
  const list = document.getElementsByClassName(loadDiffClassSelector);
  for(let i=0; i < list.length; i++) { 
    list[i].click();
  }
}());

Useful GitHub bookmarklets

To use: create a new bookmark and paste into the URL field.

In Chrome, you can paste the full multiline code as shown below.
In other browsers, you may need to minify the code into one line first.