Finished my TwitchTV app. Critics are welcome)

I would appreciate any suggestions about color, text and others.

You haven’t implemented this user story:

I will see a placeholder notification if a streamer has closed their Twitch account (or the account never existed). You can verify this works by adding brunofin and comster404 to your array of Twitch streamers.

Check for color schemes.
Blue links on red background doesn’t look good.

And I’m just curious, but why you used Babel as JS preprocessor?

Thank you for critics and for advice!
I use ES6 and for this I need Babel (In future I will try to replace callbacks with promises)