After deploying to Firebase, animations suddenly cease to function

After running npm run-script build and deploying my React app to Firebase hosting with firebase deploy, I encountered an issue where my animations stopped working.

I'm puzzled as to why this is happening, especially since I've included keyframes that are compatible with all web browsers.

When running my app on localhost (npm start), everything looks fine:

https://i.sstatic.net/ytkrE.gif

However, once it's hosted on Firebase, the animations don't seem to work:

https://i.sstatic.net/1kBJv.gif

It appears to be having trouble reading my keyframe animations.

Here's a snippet from index.js:

// Code block imported from index.js
...

And here's App.js:

// Code block imported from App.js
...

The HomePage.js file contains:

// Code block imported from HomePage.js
...

These CSS rules are defined in HomePage.module.css:

// Code block describing CSS styles for the home page
...

AnimatedSlideShowText.js includes:

// Code block related to AnimatedSlideShowText component
...

This animation module can be found in AnimatedSlideShowText.module.css:

// Code block showing CSS animations for slide show text
...

If more source code is necessary to address the problem, please let me know. Any assistance in resolving this animation issue post-build and deployment would be greatly appreciated. Do you think using module.css could potentially affect animations in the deployed version? Your insights would be invaluable; thank you in advance for your help.

Answer №1

In a previous experience, I encountered a similar issue while using a CSS framework. The culprit turned out to be the build cache on my hosting provider. When utilizing create-react-app (which utilizes Webpack), the 'tree-shake' process occurs during the build stage. This process eliminates any unused styles, classes, etc from your modules.

A module that functioned properly in a local environment may fail in production because it was removed during the initial build and is subsequently excluded from the new build based on the build cache's settings.

While I can't guarantee that this will solve your current problem, I recommend investigating this possibility as it proved effective for me in the past.

Answer №2

Success! I was able to solve the issue, which turned out to be simpler than I initially thought.

Summary: The key fix was changing all instances of opacity: 100% to opacity: 1, and suddenly everything displayed correctly.

Detailed explanation: After some troubleshooting in the console, I discovered that all elements were present but not visible. By experimenting with animations on and off, I noticed brief flickers indicating the problem. It appeared that the opacity was mistakenly set as opacity: 1% instead of opacity: 100%. Strangely, building with npm run-script build seemed to introduce these extra zeros after 100%.

In any case, thank you for the assistance, everything is now functioning perfectly.

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