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Comment by sp332 | Hacker News Reader

I was poking around and found this in the linked article, at the end of the article text:

  <script type="text/javascript" src="http://127.0.0.1:5337/
   opmlEditor/comments/
   button?title=The%20magic%20of%20HTML%205%20and%20S3&
   editorialDomain=comments.scripting.com></script>

What does it do? Wouldn't it fail loading something from my localhost?

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Not familiar with OPML editor, but it looks like a way of activating features that are only available on the author's own computer (e.g., editing comments) that is useless to everyone else. Seems like a bad way of doing that though.

Dave's long-time software, Radio Userland http://radio.userland.com uses a local server to serve the UI of a blog publishing tool. I surmise it published this site, and this is an artifact.

In the dev console you can see that this script actually failed to load.

This confuses me, and I am also unclear about the benefits HTML5 bring over a normal static website - S3 is already "infinitely scalable."

He just means that HTML5 allows you to do things purely locally that previously would have required some kind of interaction with a dynamic script on a web server.

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