The line art look is pretty popular these days. It’s largely due to the fact that After Effects shape layers excel at this type of animation. If you’ve ever wanted to see how line art animation comes together in Ae, then check out this short tutorial by Evan Abrams for PremiumBeat.
Evan walks through how to draw and animate a line art envelope step by step. This includes a neat trick for animating the paper that comes out of the envelope to give it a curled look.
Line art animation is pretty easy to do — you only need a few keyframes to create the motion you need with shape layers. It’s a great way to get a clean look to a looping GIF or UI element.