Angular PrimeNG TieredMenu Styling

Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. It provides a lot of templates, components, theme design, an extensive icon library, and much more. In this article, we will see the Angular PrimeNG TieredMenu Styling.

The TieredMenu component allows the creation of the menu in the form of a tier. It displays submenus in nested overlays. The TieredMenu Styling classes allow changing the design of the component from the default design by implementing the various list of structural style classes.

Angular PrimeNG TieredMenu Styling Classes:

• p-tieredmenu: It is a container element.
• p-menu-list: It is a list element.
• p-menuitem: It is a menuitem element.
• p-menuitem-text: It is a label of a menu item.
• p-menuitem-icon: It is an icon of a menu item.
• p-submenu-icon: It is the arrow icon of a submenu.

Syntax:

// app.component.html
<p-tieredMenu [model]="items"></p-tieredMenu>

// app.component.css
:host ::ng-deep .p-menuitem-text {
  border: 2px black;
  border-style: dashed;
}

Creating Angular application & Module Installation:

Step 1: Create an Angular application using the following command.

ng new geeks_angular

Step 2: After creating your project folder i.e. geeks_angular, move to it using the following command.

cd geeks_angular

Step 3: Install PrimeNG and CDK in your given directory.

npm install primeng --save
npm install primeicons --save

Project Structure: The project structure will look like the following:

Example 1: In the following example, we have a TieredMenu with a border around list items.

• app.component.html

HTML

<h1 style="color: green;
           text-align:center;">
  GeeksforGeeks
</h1>

<h3>Angular PrimeNG TieredMenu Styling</h3>
<p-tieredMenu [model]="items"></p-tieredMenu>

• app.component.css

CSS

:host ::ng-deep .p-menuitem {
  border: 2px black;
  border-style: dashed;
  padding: 2px;
}

• app.component.ts

Javascript

import { Component, OnInit, ViewEncapsulation }
    from '@angular/core';
import { MenuItem } from 'primeng/api';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css'],
})
export class AppComponent {
    items: MenuItem[];

    ngOnInit() {
        this.items = [
            {
                label: 'Data Structures',
                items: [
                    {
                        label: 'Linked List',
                        items: [
                            {
                                label: 'Singly Linked List',
                            },
                            {
                                label: 'Doubly Linked List',
                            },
                        ],
                    },
                    {
                        label: 'Trie',
                    },
                    {
                        label: 'Array',
                    },
                ],
            },
            {
                label: 'Algorithms',
                items: [
                    {
                        label: 'Sorting',
                    },
                    {
                        label: 'Searching',
                    },
                ],
            },
            {
                label: 'Development',

                items: [
                    {
                        label: 'Android',
                    },
                    {
                        label: 'Web development',
                    },
                ],
            },
        ];
    }
}

• app.module.ts

Javascript

import { NgModule } from '@angular/core';
import { BrowserModule }
    from '@angular/platform-browser';
import { RouterModule } from '@angular/router';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { TieredMenuModule } from 'primeng/tieredmenu';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TieredMenuModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})

export class AppModule { }

Output:

Example 2: In the following example, we have applied a shadow around the list item.

• app.component.html

HTML

<h1 style="color: green;
           text-align:center;">
  GeeksforGeeks
</h1>

<h3>Angular PrimeNG TieredMenu Styling</h3>
<p-tieredMenu [model]="items"></p-tieredMenu>

• app.component.css

CSS

:host ::ng-deep .p-submenu-list {
  box-shadow: 10px 8px 10px #1ac53f;
}

• app.component.ts

Javascript

import { Component, OnInit, ViewEncapsulation }
    from '@angular/core';
import { MenuItem } from 'primeng/api';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css'],
})
export class AppComponent {
    items: MenuItem[];

    ngOnInit() {
        this.items = [
            {
                label: 'Data Structures',
                items: [
                    {
                        label: 'Linked List',
                        items: [
                            {
                                label: 'Singly Linked List',
                            },
                            {
                                label: 'Doubly Linked List',
                            },
                        ],
                    },
                    {
                        label: 'Trie',
                    },
                    {
                        label: 'Array',
                    },
                ],
            },
            {
                label: 'Algorithms',
                items: [
                    {
                        label: 'Sorting',
                    },
                    {
                        label: 'Searching',
                    },
                ],
            },
            {
                label: 'Development',

                items: [
                    {
                        label: 'Android',
                    },
                    {
                        label: 'Web development',
                    },
                ],
            },
        ];
    }
}

• app.module.ts

Javascript

import { NgModule } from '@angular/core';
import { BrowserModule }
    from '@angular/platform-browser';
import { RouterModule } from '@angular/router';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { TieredMenuModule } from 'primeng/tieredmenu';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TieredMenuModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})

export class AppModule { }

Output:

Reference: http://primefaces.org/primeng/tieredmenu