AngularJS使用箭头键导航Image Carousel

I have an image carousel built in AngularJS that navigates via two A tags used as buttons with ng-click. I would like to allow the user to also use the arrow keys to navigate left and write. I have found a few examples using ng-keypress, or ng-keyup/keydown, but they all require an input tag to have focus. I have an image carousel built in AngularJS tha