当您在mat-menu菜单上使用复选框(或任何响应点击的交互式元素)时，您不希望菜单在您关闭时关闭单击它，您需要通过使用MouseEvent.stopPropagation()停止菜单来阻止菜单接收到click事件.尝试这样的事情:

When you use a checkbox (or any interactive element that responds to clicks) on a mat-menu, and you don't want the menu to close when you click it, you need to prevent the menu from receiving the click event by stopping it with MouseEvent.stopPropagation(). Try something like this:

<mat-checkbox (click)="$event.stopPropagation()">Check Me</mat-checkbox>

md-prevent-menu-close功能来自AngularJS的旧Angular Material-Angular Material(v6)的最新版本"没有该功能. Angular Material(对于AngularJS为v1.x)和Angular Material2(对于Angular为v2/5/6)不可互换.

The md-prevent-menu-close feature is from the old Angular Material for AngularJS - the 'latest version' of Angular Material (v6) doesn't have that feature. Angular Material (v1.x for AngularJS) and Angular Material2 (v2/5/6 for Angular) are not interchangeable.