Just so everyone is clear on this: “Flexbox” (more specifically: CSS Flexible Box Layout Module) has undergone a lot of changes in the last three years. Changes both to the spec and what browsers have implemented.
How To Tell
If you Google around about Flexbox, you will find lots of outdated information. Here’s how you can quickly tell:
If you are looking at a blog post (or whatever) about Flexbox and you see display: box; or a property that is …