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MetaFilter number all comments

On MetaFilter.com, adds a "comment 1 of 30" to each comment.

当前为 2019-08-12 提交的版本，查看 最新版本。

	// ==UserScript==
// @name        MetaFilter number all comments
// @version     2
// @grant       none
// @match       http://*.metafilter.com/*
// @match       https://*.metafilter.com/*
// @description On MetaFilter.com, adds a "comment 1 of 30" to each comment.
// @locale      en-us
// @namespace   https://greasyfork.org/users/324881
// ==/UserScript==

function addCountToComments() {
  // first, clear all counts in case this runs more than once on a page.
  let allCommentCountSpans = document.getElementsByClassName('tehhundUserScriptCommentCount');
  let loopCount = 0;
  while (allCommentCountSpans.length > 0) { // .remove() is failing on random spans for an unknown reason, so loop this until it finishes removing everything. <Gary Oldman voice>EVERYTHING!</Gary Oldman voice>
    loopCount += 1;
    console.log("Number of loops: " + loopCount);
    for (currentSpan of allCommentCountSpans) {
      currentSpan.remove();
    }
    allCommentCountSpans = document.getElementsByClassName('tehhundUserScriptCommentCount'); // Grab all elements so the loop can check whether it's done.
  }
  
  // then add counts to every comment div.
  let allCommentDivs = document.getElementsByClassName('comments');
  allCommentDivs = Array.from(allCommentDivs).filter( function(div) { return div.previousSibling.tagName == 'A'; });
  let index = 0;
  for (let divToHighlight of allCommentDivs) {
    index += 1;
    divToHighlight.lastChild.innerHTML += '<span class=\'tehhundUserScriptCommentCount\'>. Comment ' + index + ' of ' + allCommentDivs.length + ' </span>';
  }
}

// Attach event listeners

window.addEventListener('load',addCountToComments); // In case this script runs before the window load event, highlight when that event fires.
addCountToComments(); // In case this script runs after the window load event, highlight as soon as Greasemonkey runs the script.