Check for abnormal line differences on the Files tab for a GitHub PR

check-git-diff.js

([]).map.call(document.querySelectorAll('.diffstat.tooltipped'), (n) => {
  const linesChanged =  +n.innerHTML.match(/^\d+/)[0];
  if(linesChanged > 100) {
    // Log the line delta and the name of the file.
    console.log(n, n.parentNode.querySelector('a'));
  }
  return linesChanged;
});