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Build is non-deterministic, CSS changes on every build #37

markdalgleish opened this issue Apr 19, 2015 · 1 comment

Build is non-deterministic, CSS changes on every build #37

markdalgleish opened this issue Apr 19, 2015 · 1 comment


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@markdalgleish markdalgleish commented Apr 19, 2015

The random animation delays (e.g.

animation-delay: ((random(100) / 100) - 0.2) + s;
animation-duration: ((random(100) / 100) + 0.3) + s;
) are only calculated at build time and make the build non-deterministic.

Every build results in a different CSS file, which is probably not ideal for a number of reasons:

  • A refactor with no change to the resulting CSS will still generate new animations.
  • Random animations are locked for each version, so users of an app using this library will see the same "random" animation for a while until they upgrade, at which point they'll get a new "random" animation until the next upgrade.

If you don't see this as a problem, feel free to close this issue.

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@ConnorAtherton ConnorAtherton commented Apr 20, 2015

Yeah, I'm not entirely happy with this behaviour. It wasn't a big issue for me at the start because I was just having fun with it and seeing what interesting animations I could create under imposed constraints.

I think if the parameters that generate the randomness are bounded in such a way that it doesn't change the output enough for people to visually notice, then I don't see it as a problem.

However, I've never been entirely comfortable with values changing for no reason just from a maintenance standpoint. I want to keep this open and replace the random calls to verbose nth-child declarations.

p.s. How did you get involved in nodeschool? I would love find a way to help out in my spare time.

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