Style old Github issues

old-issues.js

var how_far_back = 60; //time in days
var css = '.old-issue { background-color: #ddd; opacity: 0.1; filter: blur(2px); -webkit-filter: blur(2px); }'; //your css

// don't edit below!
var $rows = document.querySelectorAll('.js-issue-row'); //all issues
//check for old issues
for (var i = 0, l = $rows.length; i < l; i++) {
    var current_time = new Date();
    var $issue = $rows[i];
    var $issue_time = $issue.getElementsByTagName('relative-time');
    var issue_time = new Date($issue_time[0].getAttribute('datetime'));

    current_time.setDate(current_time.getDate() - how_far_back);
	if (issue_time < current_time) {
	    
	    $issue.className += ' old-issue';
	}
}

// insert stylesheet in head
var $head = document.head || document.getElementsByTagName('head')[0];
var $style = document.createElement('style');

$style.type = 'text/css';
if ($style.styleSheet){
  $style.styleSheet.cssText = css;
} else {
  $style.appendChild(document.createTextNode(css));
}

$head.appendChild($style);

Updated:

• Removed jQuery requirement
• Handles Github's change from time element to relative-time