Bookmarklet to expand all "Show resolved" and "Show hidden" and "Load More" links in a GitHub PR conversation

expand all comments.js

javascript:(() => {
  const DEFAULT_NUM_TRIES_AFTER_DONE = 5;
  const MILLIS_TO_SLEEP = 500;
  const MAX_ITERATIONS = 50;
  const MAX_PARENTS_TO_CHECK = 7;

  /* Originally taken from https://github.com/broadinstitute/gatk/wiki/Expand-outdated-Github-Comments */
  function loadAll(numIterations, triesRemainingAfterDone) {
    let showButtonArray = Array.from(document.getElementsByClassName('Details-content--closed')).filter(element => !parentIsOpen(element));
    let loadMoreButtonArray = Array.from(document.getElementsByClassName('ajax-pagination-btn'));
    let foundSome = showButtonArray.length > 0 || loadMoreButtonArray.length > 0;
    
    showButtonArray.forEach(showButton => showButton.click());
    loadMoreButtonArray.forEach(loadMoreButton => loadMoreButton.click());
    
    scheduledNext(foundSome, numIterations, triesRemainingAfterDone);
  }

  function scheduledNext(foundSome, numIterations, triesRemainingAfterDone) {
    if (numIterations > MAX_ITERATIONS) {
      console.log(`stopped loading github comments to prevent infinite loop. numIterations = ${numIterations}`);
      return;
    }
    
    if (foundSome) {
      setTimeout(() => loadAll(numIterations + 1, DEFAULT_NUM_TRIES_AFTER_DONE), MILLIS_TO_SLEEP);
    } else if (triesRemainingAfterDone > 0) {
      setTimeout(() => loadAll(numIterations + 1, triesRemainingAfterDone - 1), MILLIS_TO_SLEEP);
    } else {
      done();
    }
  }

  function parentIsOpen(element) {
    let currentParent = element.parentNode;
    for (let i = 0; i < MAX_PARENTS_TO_CHECK; i++) {
      if (currentParent === null || currentParent === undefined) {
        return false;
      }

      if (currentParent.hasAttribute('open')) {
        return true;
      }

      currentParent = currentParent.parentNode;
    }
  }

  /* inspired from this: https://stackoverflow.com/a/15466856/152061 */
  function done() {
    let div = document.createElement('div');
    div.setAttribute('style', 'position:fixed; top:15%; left:1%; background-color:white; color:black display:inline-block; border-style:solid; border-color:black;');
    div.innerHTML = 'finished expanding comments';
    document.body.appendChild(div);
    setTimeout(() => div.parentNode.removeChild(div), 2500);
    console.log('done');
  }
  
  loadAll(0, DEFAULT_NUM_TRIES_AFTER_DONE);
})();