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Why is my element leaving behind white specks when it transitions?

Hey Guil Hernandez maybe you could help me out with this. I just finished your course on CSS Layout Techniques.

I noticed when I didn't have the flex-grow transition property set for my navigation list items, when my icons slide in they leave behind a trail of "debris". Why is this? What causes this?

Here's a photo of what's happening: http://imgur.com/ANOENrd

When I added the flex-grow transition it solved the problem, but what if I don't want any flex-grow?

nicholas maddren
nicholas maddren
12,793 Points

You'd really need to include your code for anyone to replicate the issues you are having so we can help. JSFiddle is always good :) Thanks