@cavias as you pointed in this Symfony Docs issue: symfony/symfony-docs#19878 Cloudflare has decided to deprecate the minify feature. They explain this:

The reasons why we plan to remove the feature are manifold but boil down to the fact that it’s a performance feature used for the purpose of reducing page weight and it is not as efficient at doing this as other projects Cloudflare’s working on, like improving compression.

In the related email that Cloudflare sent to customers they even give this number:

the benefit (of minify) for page size reduction is less than 0.1% across all minified files on Cloudflare's network

And also:

As we continue to invest in compression, we have observed a consistent decrease in users of Auto Minify

In your case, it's clear that minifying assets produces better results. However, generally speaking, minifying asset contents is no longer required for most apps, as long as they use an excellent compression feature such as Brotli or zstd.

With regards to Cloudflares arguments. Couldn't it also be the case that with a lot of modern websites there is an assets build pipeline which does (already) minify the assets? So in those cases it doesn't make sense to enable auto minify on Cloudflares end (as there should be nothing to minify anymore, as it's already minified). And in those cases where the auto minify would still be enabled while the "original" assets are already minified it would obviously also result in not having any effects (or less effect).

And this is also (clearly) stated in their deprecation notice:

We recommend that you minify at the origin during the build phase. Minification is included in most modern web development frameworks.

(emphasis mine)

So IMO this is a catch 22. Symfony docs refer to (for example) using Cloudflares auto minify feature. While Cloudflare refers to using it at the origin as part of a build process.

2 things are to consider here:

1. Minification helps with performance and must be done.
2. Many people are concerned about avoiding giving internal details to anybody who opens their JS files and having the ability to read the comments. When you write twig templates, you use {# #} comments. Why pretend JS would be any different when it's more critical? (theme: privacy & security)

I wanted to claim the second point because I'm so surprised nobody raised it besides it seems so critical to me (even though I agree security by obfuscation is not great).

Besides that, I'm also surprised that it has been fine at some point to say "to do so, use cloudflare" which is a private company not related to Symfony in any way 🧐 , and it's not even free! But nvm, they do not offer the feature anymore so there's no point understanding why this recommendation anymore...

AssetMapper has the necessary extension points to allow hooking a minification step. The main issue for that is that there is no reliable implementation of a JS minifier in PHP (which is a huge project in itself, and needs to be maintained regularly to cope with updates of the JS syntax every year).
There are a bunch of JS/CSS minifiers available on Packagist but as far as I can tell, all of them use regex-based approaches, which will actively break some valid JS code.

@stof maybe we could do the same as with TailwindCSSBundle ... download a binary that does the job and that's it.

There's a Golang project that includes many minifiers ... and provides a standalone CLI binary for multiple platforms. See https://github.com/tdewolff/minify

For me the challenging part is there :

But with more official and guaranteerd support.

There are bundle out there that does help for who wants to minify its assets.

But to ensure some garantee here, in the front-end world, that's a massive leap of faith.

Any updates?

@moshkov-konstantin I've released the Minify Bundle following @javiereguiluz comment, you can try it out.

Thank you so much!

Thank you for this suggestion.
There has not been a lot of activity here for a while. Would you still like to see this feature?
Every feature is developed by the community.
Perhaps someone would like to try?
You can read how to contribute to get started.

Could I get an answer? If I do not hear anything I will assume this issue is resolved or abandoned. Please get back to me <3