show-hide-github-outdated-comments.js

## set the attribute 'open' to show the outdated comment
javascript:Array.from(document.getElementsByClassName('outdated-comment')).forEach(l => l.setAttribute('open',true));

## remove the attribute 'open' to collapse the outdated comment 
javascript:Array.from(document.getElementsByClassName('outdated-comment')).forEach(l => l.removeAttribute('open'));

## Show

javascript:(function() {var list = document.getElementsByClassName("outdated-comment"); 
for (var i = 0; i < list.length; i++) { list[i].setAttribute("open", "");} ;}());
 
## Hide 
javascript:(function() {var list = document.getElementsByClassName("outdated-comment"); 
for (var i = 0; i < list.length; i++) { list[i].removeAttribute("open");} ;}());