How to prevent angular material mat-menu from closing?

Question

I'm creating a date time picker control in the angular material and having the below code to do that

<button mat-button [matMenuTriggerFor]="menu">
    <mat-icon>date_range</mat-icon>
    <span>Date Range</span>
</button>
<mat-menu #menu="matMenu">
    <div fxLayout="row">
        <div fxLayout="column">
            <button (click)="setInterval(15)" mat-menu-item>Last 15 minutes</button>
            <button (click)="setInterval(360)" mat-menu-item>Last 6 hours</button>
            <button (click)="setInterval(1440)" mat-menu-item>Last 24 hours</button>
            <button (click)="setInterval(2880)" mat-menu-item>Last 2 days</button>
            <button (click)="setInterval(10080)" mat-menu-item>Last 7 days</button>
            <button (click)="setInterval(-1)" [matMenuTriggerFor]="dateTimeMenu" mat-menu-item>Custom</button>
        </div>
        <mat-menu class="date-range-menu" #dateTimeMenu="matMenu">
            <div fxLayout="row">
                <div fxLayout="column">
                    <b>From</b>
                    <mat-calendar></mat-calendar>
                </div>
                <div fxLayout="column">
                    <b>To</b>
                    <mat-calendar></mat-calendar>
                </div>
            </div>
        </mat-menu>
    </div>
</mat-menu>

Currently when ever I click a button it is closing the menu. I know we can do $event.stoppropagation() on each mat-menu-item to prevent it from closing.

But I want to know is it possible to do that for mat-calendar

As you can see in the above image currently when i select a date it is closing the menu. Is it possible to prevent that?

Answer 1

You just add (click) = "$event.stopPropagation()" to the parent element of these calendars. Like below,

<mat-menu class="date-range-menu" #dateTimeMenu="matMenu">
    <div fxLayout="row">
        <div fxLayout="column" (click)="$event.stopPropagation();">
            <b>From</b>
            <mat-calendar></mat-calendar>
        </div>
        <div fxLayout="column" (click)="$event.stopPropagation();">
            <b>To</b>
            <mat-calendar></mat-calendar>
        </div>
    </div>
</mat-menu>

Stackblitz demo.

Answer 2

By giving a return to the previous solution, encapsulating the instruction in a method allows not to close the menu and continue executing instructions

IN HTML:

<mat-menu class="date-range-menu" #dateTimeMenu="matMenu">
    <div fxLayout="row">
        <div fxLayout="column" (click)="doSomething($event);">
            <b>From</b>
            <mat-calendar></mat-calendar>
        </div>
        <div fxLayout="column" (click)="doSomething($event)">
            <b>To</b>
            <mat-calendar></mat-calendar>
        </div>
    </div>
</mat-menu>

IN TS:

doSomething($event:any){
    $event.stopPropagation();
    //Another instructions
}

Answer 3

if You want to stop closing mat-menu even on clicking on mat-menu-content i did hack as added $event.stopPropogation() on a anchor tag instead of mat-menu. so Menu dailog will not close even if clicked anywhere on the form.

Example:- 
    <mat-menu #nameAndDescriptioContextMenu="matMenu" [hasBackdrop]="false">
         <a (click)="$event.stopPropagation();$event.preventDefault();">
               <div>
                 Form Group Form
               </div> 
         </a> 
    </mat-menu>

Answer 4

You have many options, I invite you try the following

    <mat-menu [hasBackdrop]="false">
     <div  (click)="$event.stopPropagation()" (keydown)="$event.stopPropagation()">
     ...
     </div>
    </mat-menu>

the [hasBackdrop]="false" if you want to prevent closing mat-menu when clicking anywhere outside the box, otherwise remove it

Answer 5

Unfortunately, none of the above answers worked for me. In cases when you need menu panel to be much wider than the content, there is no place you can put "$event.stopPropagation();" on, so if you click on mat-menu-panel it will close. Luckily, there is still a way to avoid this, by 'overriding' click event of MatMenu. Here is stackblitz example, thanks to my colleague: https://stackblitz.com/edit/mat-menu-disable-close

ngAfterViewInit() {
    // Inject our custom logic of menu close
    (this.searchMenu as any).closed = this.searchMenu.close = this.configureMenuClose(this.searchMenu.close);
  }

private configureMenuClose(old: MatMenu['close']): MatMenu['close'] {
    const upd = new EventEmitter();
    feed(upd.pipe(
      filter(event => {
        if (event === 'click') {
          // Ignore clicks inside the menu 
          return false;
        }
        return true;
      }),
    ), old);
    return upd;
  }
}
function feed<T>(from: Observable<T>, to: Subject<T>): Subscription {
  return from.subscribe(
    data => to.next(data),
    err => to.error(err),
    () => to.complete(),
  );
}

This way, it will close only if you click outside (that's an easy to remove) and if you use trigger. That is the behavior I wanted in my project and I hope it will be useful for someone.

Answer 6

you can use this directive directly in your component.

in HTML

<mat-menu class="date-range-menu" #dateTimeMenu="matMenu">
    <div fxLayout="row">
        <div fxLayout="column" mat-filter-item>
            <b>From</b>
            <mat-calendar></mat-calendar>
        </div>
        <div fxLayout="column" mat-filter-item >
            <b>To</b>
            <mat-calendar></mat-calendar>
        </div>
    </div>
</mat-menu>

save it as filter.directive.ts import { Directive, HostListener, HostBinding } from "@angular/core";

@Directive({
  selector: "[mat-filter-item]"
})
export class FilterItemDirective {
  @HostListener("click", ["$event"])
  onClick(e: MouseEvent) {
    e.stopPropagation();
    e.preventDefault();

    return false;
  }
}