FlexBox Playground
the-echoplex.net
the-echoplex.net
Of course I must say I don’t wish any disprespect to pete_b. Efforts like these always appreciated, and it does have value, at minimum allowing others to learn and evolve from it.
It could just be so much more intuitive to illuminate the most important flexbox levers and more effective as a productivity tool to quick prototype results for use in other code.
The first time I played with flexbox, I needed something, anything, to show me how it worked, and this saved me the time of making the same thing by hand. It was a great learning tool.
I found a few of these demo sites for flexbox, and I'd hit them when I was trying to figure out a new property or method. Then after awhile, I didn't need them anymore. So I wouldn't ever expect it to be anything more than a teaching tool, not a dev tool.