Menu | Pfft !

https://github.com/victorqribeiro/radialMenu 03/09/2019

Flippin' burgers 16/09/2018

A set of hamburger menu open/close animations…

https://codepen.io/erikterwan/pen/EVzeRP 05/05/2018

https://developers.google.com/web/updates/2017/03/performant-expand-and-collapse 20/11/2017