How to open and close Angular mat menu on hover

How to open and close Angular mat menu on hover

In Angular, you can open and close a MatMenu on hover by using Angular Material's mat-menu-trigger-for directive along with a combination of @HostListener for hover events. Here's an example:

Assuming you have a MatMenu and a trigger button in your component's template:

<button mat-button [matMenuTriggerFor]="menu" (mouseenter)="openMenu()" (mouseleave)="closeMenu()"> Open Menu </button> <mat-menu #menu="matMenu"> <!-- Your menu content here --> <button mat-menu-item (click)="menuItemClicked()">Menu Item</button> </mat-menu>

Now, in your component class, implement the logic to open and close the menu on hover:

import { Component, HostListener, ViewChild } from '@angular/core'; import { MatMenuTrigger } from '@angular/material/menu'; @Component({ selector: 'app-your-component', templateUrl: './your-component.component.html', styleUrls: ['./your-component.component.css'] }) export class YourComponent { @ViewChild(MatMenuTrigger) menuTrigger: MatMenuTrigger; openMenu() { this.menuTrigger.openMenu(); } closeMenu() { this.menuTrigger.closeMenu(); } @HostListener('document:click', ['$event']) documentClick(event: MouseEvent): void { if (!this.menuTrigger.menuOpen && !this.menuTrigger._elementRef.nativeElement.contains(event.target)) { this.closeMenu(); } } menuItemClicked() { // Handle menu item click logic here this.closeMenu(); } }

Explanation:

  • matMenuTriggerFor is used to associate the trigger button with the MatMenu.
  • (mouseenter) and (mouseleave) events are used to handle hover events on the trigger button.
  • The openMenu() and closeMenu() methods are used to programmatically open and close the menu.
  • @HostListener is used to close the menu when a click occurs outside the menu or trigger button.
  • menuItemClicked() is a placeholder for your menu item click logic.

Adjust the code according to your specific requirements and styling preferences.

Examples

  1. "Angular Material open mat menu on hover"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="menuTrigger.openMenu()"> Hover me </button> <mat-menu #menu="matMenu" (mouseleave)="menuTrigger.closeMenu()"> <!-- Menu content --> </mat-menu>
    • Description: Uses (mouseenter) event to open the mat menu and (mouseleave) event to close it.

  2. "Angular Material menu open and close on hover with delay"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="openMenuWithDelay()" (mouseleave)="closeMenuWithDelay()"> Hover me </button> <mat-menu #menu="matMenu"> <!-- Menu content --> </mat-menu>
    • Description: Adds delay using methods openMenuWithDelay() and closeMenuWithDelay() to control menu open and close on hover.

  3. "Angular Material menu open on hover and close on click outside"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="menuTrigger.openMenu()"> Hover me </button> <mat-menu #menu="matMenu" (click)="menuTrigger.closeMenu()"> <!-- Menu content --> </mat-menu>
    • Description: Opens the menu on hover and closes it on a click outside the menu.

  4. "Angular Material menu open on hover and close on menu item click"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="menuTrigger.openMenu()"> Hover me </button> <mat-menu #menu="matMenu"> <button mat-menu-item (click)="menuTrigger.closeMenu()"> Menu Item 1 </button> <!-- Other menu items --> </mat-menu>
    • Description: Opens the menu on hover and closes it when a menu item is clicked.

  5. "Angular Material open and close nested mat menus on hover"

    • Code:
      <button mat-button [matMenuTriggerFor]="parentMenu" (mouseenter)="parentMenuTrigger.openMenu()"> Hover me </button> <mat-menu #parentMenu="matMenu" (mouseleave)="parentMenuTrigger.closeMenu()"> <button mat-menu-item [matMenuTriggerFor]="childMenu"> Nested Menu </button> <!-- Other parent menu items --> </mat-menu> <mat-menu #childMenu="matMenu" (mouseleave)="childMenuTrigger.closeMenu()"> <!-- Nested menu content --> </mat-menu>
    • Description: Handles opening and closing of both parent and nested menus on hover.

  6. "Angular Material menu open on hover and close on outside click with directive"

    • Code:
      <div appMenuHoverDirective [matMenuTriggerFor]="menu"> Hover me </div> <mat-menu #menu="matMenu"> <!-- Menu content --> </mat-menu> 
      // menu-hover.directive.ts @Directive({ selector: '[appMenuHoverDirective]' }) export class MenuHoverDirective { @HostListener('mouseenter') onMouseEnter() { this.menuTrigger.openMenu(); } @HostListener('mouseleave') onMouseLeave() { this.menuTrigger.closeMenu(); } constructor(private menuTrigger: MatMenuTrigger) { } }
    • Description: Uses a custom directive to handle menu open and close on hover with outside click.

  7. "Angular Material open mat menu on hover with animation"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="menuTrigger.openMenu()"> Hover me </button> <mat-menu #menu="matMenu" [@menuAnimation]="menuState" (mouseleave)="menuTrigger.closeMenu()"> <!-- Menu content --> </mat-menu> 
      // component.ts export class MyComponent { menuState: string = 'closed'; @ViewChild('menu') menu: MatMenu; constructor(private menuTrigger: MatMenuTrigger) { } ngAfterViewInit() { this.menuTrigger.menuOpened.subscribe(() => this.menuState = 'open'); this.menuTrigger.menuClosed.subscribe(() => this.menuState = 'closed'); } }
    • Description: Adds animation to the menu using Angular animations.

  8. "Angular Material menu open on hover with delay and close on outside click"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="openMenuWithDelay()" (mouseleave)="closeMenuWithDelay()"> Hover me </button> <mat-menu #menu="matMenu" (click)="closeMenuWithDelay()"> <!-- Menu content --> </mat-menu> 
      // component.ts export class MyComponent { private delayTimer: any; openMenuWithDelay() { this.delayTimer = setTimeout(() => { this.menuTrigger.openMenu(); }, 500); // Adjust the delay time as needed } closeMenuWithDelay() { clearTimeout(this.delayTimer); this.menuTrigger.closeMenu(); } }
    • Description: Adds delay to menu open and close, and closes on outside click.

  9. "Angular Material menu open on hover with dynamic content"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="menuTrigger.openMenu()"> Hover me </button> <mat-menu #menu="matMenu" (mouseleave)="menuTrigger.closeMenu()"> <ng-container *ngFor="let item of menuItems"> <button mat-menu-item>{{ item }}</button> </ng-container> </mat-menu> 
      // component.ts export class MyComponent { menuItems: string[] = ['Item 1', 'Item 2', 'Item 3']; }
    • Description: Dynamically generates menu items based on a data source.

  10. "Angular Material open and close mat menu on hover using HostListener"

    • Code:
      <button mat-button [matMenuTriggerFor]="menu" (mouseenter)="openMenu()" (mouseleave)="closeMenu()"> Hover me </button> <mat-menu #menu="matMenu"> <!-- Menu content --> </mat-menu> 
      // component.ts export class MyComponent { @ViewChild('menu') menu: MatMenu; openMenu() { this.menu.openMenu(); } closeMenu() { this.menu.closeMenu(); } }
    • Description: Uses HostListener to handle menu open and close on hover.

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