Using mat-menu as context menu: How to close opened mat-menu, and open it in another location · Issue #655 · angular/material.angular.io · GitHub
Can't bind to 'matMenuTriggerFor' since it isn't a known property of 'button'. (""> · Issue #7301 · angular/components · GitHub
![mat-menu]: control the arrow position in a nested menu trigger · Issue #8402 · angular/components · GitHub mat-menu]: control the arrow position in a nested menu trigger · Issue #8402 · angular/components · GitHub](https://user-images.githubusercontent.com/5377501/32706023-ad50322e-c822-11e7-9e33-beabc1f2becb.png)