Quick Edit for Blogger Themes without quick edit enabled

The almighty quick edit

Create a HTML/Javascript Widget to the footer, and add this code:

<span class="item-control blog-admin">
<a 
onclick="blogQuickEdit()" style="display: block;text-align: 
center;"><img alt='' class='icon-action' height='18' 
src='http://img2.blogblog.com/img/icon18_edit_allbkg.gif' 
width='18'/></a>
</span>
<script>
// https://cl.mt/blog/new-blogger-theme-quick-editing
function blogQuickEdit() {
    var str = document.getElementsByTagName('html')[0].innerHTML;
    var w;
    var urla = window.location.href
    var v = str.split("targetBlogID=")[1];
    w = v.substring(0, v.indexOf("&"));
    var r = str.split("postID=")[1];
    var z = r.substring(0, r.indexOf("&"))
	if (z.length > 19) { //legacy support
		r = str.split("feeds/")[4];
		z = r.substring(0, r.indexOf("/"));
	}
    var url = "https://www.blogger.com/blog/post/edit/" + w + "/" + z;
    window.open(url, '_blank');
}
</script>

Modified from Clement Ong's work to work on a website rather than a bookmark, and use the new blogger editor as of 2020.

DISCLAIMER: I'm lazy and only set this up to quick edit posts. It will fail for pages.