It’s hard to say for this, but from your codepen, it doesn’t work and seems you are missing jQuery. You need to have jQuery on the page for any of this to work.
I added jQuery to the codepen and it seems to work with that in place, with the exception of FB. FB also requires their own library to be included on the page.
You can start by adding one of the links from here for jQuery to the page: https://code.jquery.com/
jQuery link needs to be before your script that runs.
That should fix most of your issues.
You’ll have to comment out your FB call from setHackernewCount(); in your document ready, then all the rest should work.
This page, https://developers.facebook.com/docs/javascript/quickstart should give you what you need (instructions wise) to use the FB.ui javascript API.
UPDATE:
After more investigation I do not see this script even on the page you’re trying to use it on. You will need to start there and add the script to the page.
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solved Links via JQuery Are Working Correctly Resulting in Error or Missing URL [closed]