How can I provide a utility on sites without Stack Snippets in an appropriate manner?

Question

I just wrote this answer and in the last paragraph I decided to create a small utility as part of the answer. The utility is needed for the process. After submitting, I found that Android Enthusiasts doesn't have Stack Snippets enabled, so I ended up leaving the JS utility in the Sandbox and providing a link.

The question is, in such scenarios where I want to provide a coded utility (JavaScript or something else), especially on non-programming-oriented sites, what is a good way to do so?

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Some side notes: I didn't think of GitHub (GitHub Gists) this time because

1. GitHub Gists don't code to be executed directly, whereas Stack Snippets do
2. "Link-only answers can become invalid if the linked page changes." and I believe that Stack Exchange links are in general more reliable than GitHub links.
3. While GitHub Pages may be an alternative, there are just too many downsides and instability

Answer 1

Here's my suggestion: include a link to a place (e.g. JS Fiddle, CodePen) where the code can be run, and also include the code in the post in a code block. If the code is long, it makes sense to minify it so it all fits on one line, thus reducing the space it takes up on the page.

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The formatting sandbox should not be used like this because the answer is going to be eventually moved and the link breaks. In addition, the last time I tried to view the sandbox archive my browser (Chrome) almost crashed (in any case, the page didn't load), so fixing the link when it breaks isn't a great solution either.