If you are a frontend developer definetly you visited codepen once or frequently. i have used codepen extensively during last few years as a documentation and experimental playground.

some days tried #100dayscss and challenged myself for learning javascript by series of codepens.

Here i have listed some of my best codepens which might be useful for you in someway.you can see My codepen profile here.

1.Animation using scss loops

See the Pen 100dayscss-44 by yogeshwaran
(@yoyo) on CodePen.

2.CSS only bulb

See the Pen 100dayscss-43 by yogeshwaran
(@yoyo) on CodePen.

3.User friendly 404 page

See the Pen User friendly 404 page by yogeshwaran
(@yoyo) on CodePen.

4.Single div Coffee cup

See the Pen #codevember - 14 - Single div coffee cup by yogeshwaran
(@yoyo) on CodePen.

5.Guess the number javascript game

See the Pen Guess the number #Javascript by yogeshwaran
(@yoyo) on CodePen.