Flexbox, can I use it without fear in 2017? [closed]

There's nothing you can use without fear, not in 2017, nor ever, even more so when it comes to CSS :) Even something seemingly innocent like opacity property can cause unexpected effects depending on how and where used (worse: in this case it is not a compatibility problem between browsers, it is part of the CSS specification itself).

Your question is receiving closing votes because no one will be able to answer "yes" or "no" to this. Who will have to decide if and when to use flexbox is yourself, and you will only be able to make the decision based on data. The first thing is to look at the caniuse link that Felipe Torres cited in his response. It is the most practical reference to check CSS compatibility.

The data there shows that support today is pretty decent, if you're willing to let things break in IE 11 - which has a "bunch of bugs" according to the caniuse. But of course in the real world things are not as green when they appear in the caniuse tables, as you can see in this list of flexbox incompatibilities >, which seems to be kept up to date and cites several versions of various browsers.

My advice is: if you are "afraid" to use something, do not use. Make sure you know well how it works, and look for concrete data such as the caniuse (but not only there). The more information you have, the less "fear" you will have, and it will be possible to make a thoughtful, fact-based decision.

Yes, it works.

If your question is regarding the acceptance of Flexbox on platforms, a very cool tool is CanIUse.

You see exactly which platforms and versions support what you are looking for:

link