Angular PrimeNG TreeTable Basic

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. This article will show us how to use the Basic TreeTable in Angular PrimeNG.

Angular PrimeNG Basic TreeTable is used to render and use the TreeTable component. we can easily modify, manipulate the data and show the data in an interactive way using Basic TreeTable Component.

Syntax:

<p-treeTable #tableref>
</p-treeTable>

Creating Angular application & Module Installation:

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

ng new appname

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

cd appname

Step 3: Install PrimeNG in your given directory.

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

Project Structure: It will look like the following:

Project Structure

Example 1: Below is a simple example that demonstrates the use of the Angular PrimeNG TreeTable, In this example, we are making a simple and basic TreeTable.

app.component.html

<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Basic</h4>

<p-treeTable #myTab [columns]="cols" [value]="tableData">
  <ng-template pTemplate="colgroup" let-columns>
    <colgroup>
      <col *ngFor="let col of columns" ttReorderableColumn />
    </colgroup>
  </ng-template>

  <ng-template pTemplate="header" let-columns>
    <tr>
      <th *ngFor="let col of columns">
        {{ col.header }}
      </th>
    </tr>
  </ng-template>

  <ng-template
    pTemplate="body"
    let-rowNode
    let-rowData="rowData"
    let-columns="columns"
  >
    <tr>
      <td *ngFor="let col of columns; let i = index">
        <p-treeTableToggler
            [rowNode]="rowNode" *ngIf="i == 0">
        </p-treeTableToggler>
        {{ rowData[col.field] }}
      </td>
    </tr>
  </ng-template>
</p-treeTable>

app.component.ts

import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    tableData: TreeNode[] = [];
    cols: any[] = [];
    constructor(private nodeService: NodeService) { }

    ngOnInit() {
        this.cols = [
            { field: 'name', header: 'First Name' },
            { field: 'age', header: 'Age' },
        ];
        this.tableData = [
            {
                data: {
                    name: 'David',
                    age: '40',
                },
                children: [
                    {
                        data: {
                            name: 'Nathan',
                            age: '16',
                        },
                        children: [
                            {
                                data: {
                                    name: 'Abe',
                                    age: '12',
                                },
                            },
                            {
                                data: {
                                    name: 'Ksi',
                                    age: '12',
                                },
                            },
                        ],
                    },
                    {
                        data: {
                            name: 'Shane',
                            age: '14',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'Warner',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'Max',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'Willy',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'Miley',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'Sam',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'James',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Michelle',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'Charlie',
                            age: '24',
                        },
                    },
                ],
            },
        ];
    }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TreeTableModule,
        ButtonModule,
        InputTextModule,
        HttpClientModule,
        FormsModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [NodeService],
})

export class AppModule { }

Output:

Example 2: Below is another example that demonstrates the use of the Angular PrimeNG Basic TreeTable.

app.component.html

<h2 style="color: green">GeeksforGeeks</h2>
<h4>Angular PrimeNG TreeTable Basic</h4>

<p-treeTable #myTab [columns]="cols" [value]="tableData">
  <ng-template pTemplate="colgroup" let-columns>
    <colgroup>
      <col *ngFor="let col of columns" ttReorderableColumn />
    </colgroup>
  </ng-template>

  <ng-template pTemplate="header" let-columns>
    <tr>
      <th *ngFor="let col of columns">
        {{ col.header }}
      </th>
    </tr>
  </ng-template>

  <ng-template
    pTemplate="body"
    let-rowNode
    let-rowData="rowData"
    let-columns="columns"
  >
    <tr>
      <td *ngFor="let col of columns; let i = index">
        <p-treeTableToggler
            [rowNode]="rowNode" *ngIf="i == 0">
        </p-treeTableToggler>
        {{ rowData[col.field] }}
      </td>
    </tr>
  </ng-template>
</p-treeTable>

app.component.ts

import { Component, OnInit } from '@angular/core';
import { NodeService } from './nodeservice';
import { TreeNode } from 'primeng/api';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})
export class AppComponent {
    tableData: TreeNode[] = [];
    cols: any[] = [];
    constructor(private nodeService: NodeService) { }

    ngOnInit() {
        this.cols = [
            { field: 'name', header: 'First Name' },
            { field: 'age', header: 'Age' },
        ];
        this.tableData = [
            {
                data: {
                    name: 'A',
                    age: '40',
                },
                children: [
                    {
                        data: {
                            name: 'B',
                            age: '16',
                        },
                    },
                    {
                        data: {
                            name: 'C',
                            age: '14',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'D',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'E',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'F',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'G',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'H',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'I',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'J',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'K',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'L',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'M',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'N',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'O',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'P',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'Q',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'R',
                            age: '24',
                        },
                    },
                ],
            },
            {
                data: {
                    name: 'S',
                    age: '55',
                },
                children: [
                    {
                        data: {
                            name: 'T',
                            age: '20',
                        },
                    },
                    {
                        data: {
                            name: 'U',
                            age: '24',
                        },
                    },
                ],
            },
        ];
    }
}

app.module.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent } from './app.component';
import { NodeService } from './nodeservice';
import { TreeTableModule } from 'primeng/treetable';
import { ButtonModule } from 'primeng/button';
import { InputTextModule } from 'primeng/inputtext';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        TreeTableModule,
        ButtonModule,
        InputTextModule,
        HttpClientModule,
        FormsModule,
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent],
    providers: [NodeService],
})

export class AppModule { }

Output:

Reference: https://primefaces.org/primeng/treetable