Javascript to grab Javascript (more) comments within <head>

Question

I originally received help in this thread: Javascript to grab Javascript comments within <head>.

Where I wanted to use Greasemonkey/Javascript to grab a comment from within tags.

<html>
    <head>
    <!-- 12036,2011-11-29/11:02 -->
    <title>Products & Services</title>

The answer I received in the thread above grabbed the number "12036" and displayed this as an overlay on my page. Now I want to grab the second part (the date) ie "2011-11-29" and also display this as an overlay.

What do I need to add/change from the following to grab the date?

var commentNode = [].slice.call(document.head.childNodes).filter(function(node) {
        return node.nodeType == 8;
      })[0],
id = commentNode.data.match(/^\s*(\d+)/)[1];

var elem = document`.createElement('div');
elem.id = 'id-display';

elem.appendChild(document.createTextNode(id));

document.body.appendChild(elem);

You just need to change the regular expression, to match everything between the comma and the space. Isn't that obvious? — Barmar
– Barmar, Commented May 6, 2013 at 22:18
I don't understand what's happening. I'm not a programmer and never claimed to be. I need basic programming help with this regular expression. — rlsaj
– rlsaj, Commented May 6, 2013 at 22:40

Barmar · Accepted Answer · 2013-05-06 22:51:00Z

1

Replace the id = ... line with:

id = commentNode.data.match(/,(.*?)\s/)[1];

Go to regular-expressions.info to learn about regular expressions.

answered May 6, 2013 at 22:51

Barmar

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